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Posted by on in Valve 101

b2ap3_thumbnail_electric-actuator-exploded-view.pngAn electric actuator, also called as an electro-mechanical actuator, is a motor that makes use of electrical energy for producing mechanical energy. These are used in a number of applications and are favored by many industrial users.

Some of the advantages of electric actuators consist of the following:

  • Greater flexibility – Being highly flexible, these actuators are perfect to be used for machines or systems that require flexible processes.
  • Low replacement cost – Another major advantage offered by these types of actuators is the low replacement cost that they have. In fact, these offer great replacement value when used in applications wherein the electronics are independent of the actuator.
  • Greater accuracy – One of the greatest benefits of the electric actuators is the accuracy and precision that they offer. By employing high precision screws and anti-backlash mechanisms, users can get ultimate precision and accuracy, resulting in exact processes and results.
  • Low operational costs – It is important to note that even though the component costs of electric actuators tend to be on the higher side, still the operational and maintenance costs of these actuators is lower than the pneumatic actuators. Thus, they can be effectively used in those systems that require low maintenance and operational costs.
  • Ideal for systems where air is not available – These actuators are perfect to be used in those applications where air is not easily available. So, in case you are going to consider them for a place or situation where availability of air is a concern, and electricity is easily accessible, then go for these actuators.
  • Single source of supply – Electric actuators are great to be used for such applications which need just a single source of supply.
  • Easy installation – These actuators are not just convenient and easy to operate, but also come with simple to install wiring and offer absolutely easy installation. The installation costs of electric actuators are also on the lower side, so they are good to be used to obtain a number of advantages.
  • Accurate mounting – These actuators are suitable for applications that require accurate mounting, thanks to their great design and precise specifications.
  • No shortage of supply – In case there is a power outage, these actuators can still work with the help of a battery powered emergency power supply. So, there is nothing to worry about when these types of actuators are used in the valves.
  • Quiet operation – The electric actuators offer a smoother and quieter operation with the sophisticated technology that they have. So, in case you are looking for quieter, smoother and cleaner actuators, then these would be the right choice for you.

There are many suppliers of reliable and durable electric actuators such as Valtorc® International. Get the best in class products from this company and have smooth and glitch-free operations.

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Posted by on in Valve 101

b2ap3_thumbnail_damage-ball-valve-seats-stem.jpgAfter valve installation, it is important to take care of a ball valve and to ensure its proper maintenance. However, in many cases, even when you take great care of the valves to make sure that they function properly, still there might be cases wherein they need replacement.

This could be when the seals are broken or when some damage takes place in the valve. In fact, there can be several reasons for changing a ball valve. But what is important is to be aware of the procedure that is involved in its replacement.

Enumerated below are the few steps that can be followed to replace a ball valve in an easy manner:

  1. Buying the new valve and other supplies: You have to begin with this step. It is necessary to have all the essential things that you would need to replace the ball valve, before you take the old valve out. Thus, buy the new valve along with the supplies that are required. Ascertain the type of pipe, whether it is made up of copper, PVC, etc. Depending upon the type of pipe, you will have to buy the other necessary supplies.
  2. Turning off the water supply: The next step should be shutting off the water supply completely. Once this is done, you should then turn on the faucet, so that all the water that is sitting in the pipe comes out of the pipeline.
  3. Taking the old valve out: For removing the old valve from the pipe, you can use a hacksaw. Ensure utmost caution while you cut the pipe with the hacksaw and take the valve out of the pipe carefully, without damaging anything.
  4. Splicing the pipe & placing the new valve: After removing the valve, measure the opening to fit in the new valve and splice the new pipe with the old one. After this, put the new ball valve in place and close the pipe with the coupler.
  5. Checking the new valve: Once all the above mentioned steps are followed, turn the water and the faucets on. Make sure that the valve is working fine and there is no leakage. If you detect that there is some leakage, then take the corrective action to fix it immediately.
  6. In case, there is no leakage then turn off the water supply and seal the pipes back into the wall they are placed in. If necessary, you should repair the wall with a little paint and spackle.

By following these simple steps you can easily replace a ball valve. So, go ahead and buy your new ball valve and the necessary materials to replace the old valve. There are various manufacturers that offer great and durable valves. Contact them today and get the right products for your use, without any delay!

Tagged in: Maintenance
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Posted by on in Valve 101

b2ap3_thumbnail_steel-ball-valves.pngAfter installation, it is important to take care of a ball valve and to ensure its proper maintenance. However, in many cases, even when you take great care of the valves to make sure that they function properly, still there might be cases wherein they need replacement.

This could be when the seals are broken or when some damage takes place in the valve. In fact, there can be several reasons for changing a ball valve. But what is important is to be aware of the procedure that is involved in its replacement.

Enumerated below are the few steps that can be followed to replace a ball valve in an easy manner:

  • Buying the new valve and other supplies: You have to begin with this step. It is necessary to have all the essential things that you would need to replace the ball valve, before you take the old valve out. Thus, buy the new valve along with the supplies that are required. Ascertain the type of pipe, whether it is made up of copper, PVC, etc. Depending upon the type of pipe, you will have to buy the other necessary supplies.
  • Turning off the water supply: The next step should be shutting off the water supply completely. Once this is done, you should then turn on the faucet, so that all the water that is sitting in the pipe comes out of the pipeline.
  • Taking the old valve out: For removing the old valve from the pipe, you can use a hacksaw. Ensure utmost caution while you cut the pipe with the hacksaw and take the valve out of the pipe carefully, without damaging anything.
  • Splicing the pipe & placing the new valve: After removing the valve, measure the opening to fit in the new valve and splice the new pipe with the old one. After this, put the new ball valve in place and close the pipe with the coupler.
  • Checking the new valve: Once all the above mentioned steps are followed, turn the water and the faucets on. Make sure that the valve is working fine and there is no leakage. If you detect that there is some leakage, then take the corrective action to fix it immediately.

In case, there is no leakage then turn off the water supply and seal the pipes back into the wall they are placed in. If necessary, you should repair the wall with a little paint and spackle.

By following these simple steps you can easily replace a ball valve. So, go ahead and buy your new ball valve and the necessary materials to replace the old valve. There are various manufacturers that offer great and durable valves. Contact them today and get the right products for your use, without any delay!

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Posted by on in Valve 101

Once a valve is installed it is important that it is properly maintained, so that it works in an efficient manner. This is one such aspect which is overlooked many a times, but needs the utmost attention of the users. Poor or no maintenance of a valve can result in severe problems, leading to many obstructions in the processes for which it is being used. Therefore, it is extremely important that a valve is maintained well for better functioning and a long lasting as well as effective use.

Check after receipt

After receiving a valve, a complete and thorough examination of the product so received should be done. There might be cases wherein damages could have taken place in transit. So, the various components of the valve be it the actuator, its entire body or its ends, everything should be checked meticulously. In case a damaged valve is received, it should be replaced at the earliest to avoid any wastage of resources during the functioning of the valve.

Proper storage

If a valve is not being installed after its receipt, then it must be stored in a clean and safe place. It is important to note that the storage should be done in such a way that the valve stays away from grit, dirt, etc. If possible, it should be stored in a protective cover or casing till the time it is installed.

Clean the valve before installing

To ensure an uninterrupted flow of fluid, it is extremely important that the valve is cleaned and is free from all the dust particles, dirt, etc. This will not only help in the smooth functioning of the valve, but will also help in ensuring its long term use. It is also necessary that before its installation the valve should be completely dried out. Thus, dry air can be used for the cleaning purpose of the valve.

Manufacturer’s manuals

In case of any disruption in the working of a valve, you should always refer to the manufacturer’s manual. This will help to ensure proper valve maintenance and can also help you to sort out the minor technical glitches on your own, without the assistance of an expert.

Leakage detection

Whenever you detect any leakage from the valve, you should determine its cause, and then take the necessary corrective measure. Whether the valve needs repair or replacement, it should be decided only after thoroughly inspecting the cause of the leakage and the available solutions to correct the leakage. Many a times, it can be fixed by tightening a nut or a bolt. The pipe connections should also be regularly checked properly after the installation.

So, keep these simple and basic points in mind for proper valve maintenance & to ensure its efficient working. You can also reach to your manufacturer for any help on the valve maintenance.

There are many reliable manufacturers and suppliers of valves like Valtorc International, who can take care of all your requirements. So, contact them and get the peace of mind that you deserve.

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Posted by on in Valve 101

b2ap3_thumbnail_control-valve-diagram-bw.gifControl Valves are the valves that are used to control different conditions. These are being frequently used in many areas to control the flow, temperature, pressure, or level of any liquid. They work by closing or opening either fully or partially, when signals are received from the controllers.

By assisting in controlling the flow/temperature of liquid, these valves are increasingly being employed in oil & gas as well as in manufacturing industries. This is not all! These valves are also used at homes to control the flow of water.

There are several advantages that these valves provide and some of their benefits are listed below:

  • Automatic Operation: One of the most important benefits offered by a control valve is that it controls the opening and closing process of a fluid automatically. Thus, the users don’t have to be careful about closing or opening the valves manually, when these types of valves are employed.
  • Easy Installation: Another great advantage of control valves is that they are absolutely easy to install. Many people can effortlessly install these valves on their faucets without having to call for assistance from a plumber or from the manufacturer. Thus, being easy to install, they help in saving the time and effort of the users.
  • Reduced Wastage: Due to the automatic operations of these valves, there is a great reduction in the wastage of resources. No matter whether these are being used in industrial or manufacturing processes, or at homes, they will ensure less wastage of resources, thanks to their efficient working.

In fact, these valves are extremely helpful in saving water. Studies have revealed that control valves can lead to water savings of up to 85 percent. Thus, they are helpful in meeting the rising demand for water, by reducing the wastage of this precious resource.

  • No Clogging: Another great benefit of flow control valves is that they do not obstruct the flow of the fluid. Small particles, deposits, dust, etc. do not clog the flow of the fluid due to the perfect design of these valves.
  • Help to be Ecologically Friendly: Businesses are under a constant pressure to meet the global ecological standards. With the usage of these valves, they can become ecologically friendly by reducing the wastage of natural resources and by ensuring their judicious use.
  • Increased Financial Returns: When resources are effectively utilized, the businesses are in a position to experience reduced process variability. This ultimately helps in attaining a strategic advantage, and increasing the financial returns.
  • Saving Money Becomes Easy: When control valves are used in faucets, they help a lot in water conversation. This means that people can save money on their water and/or sewer bills by using these control valves at their homes, offices, or factories.

Thus, there are various benefits which are offered by control valves. Get them from a reliable manufacturer and use them to experience all these benefits. Search online and find a good supplier of these valves at the earliest!

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b2ap3_thumbnail_connection-ends-valves.jpgThere are various types of end connections that a valve can have. Depending upon the types of applications the valves are being used for, you can choose the right type of end connections. The common types of valve end connections are as follows:

Flanged Valve End Connections – These are one of the easiest connections to be installed or uninstalled from a pipeline. These are also one of the most commonly used end connections at present. As these are fastened to the pipe flanges, assembling or disassembling them is quick and easy. These are usually available in sizes from 15mm onwards. An important point to be mentioned about these types of end connections is that they are secured with several bolts. Thus, they ultimately need less tightening torque than what a threaded end connection requires. Hence, flanged end connections can be effectively used for various types of valves.

Threaded Valve End Connections – These types of end connections are suitable for low pressure piping systems. These are affordable and ensure quick assembly to the users, without any difficulty. In some cases, these connections may be welded around the joint, once they are assembled. However, this is not much in practice as it may cause some troubles in the efficient use of these types of valve end connections.

Socket Weld Valve End Connections – These types of connections are socketed so as to have a plain spigot end of the pipe. These are used on valves that are made up of steel, and for such applications that require higher pressure and/or higher temperature in pipelines that do not necessitate repeated disassembling. They ensure leakproof connections, that too for a long time span.

Butt Weld Valve End Connections – These types of end connections are manufactured in such a manner that each end of the valve is bevelled to match with the thickness and bevel on the pipe.   After this, the two ends are butted to the pipeline and are welded. They are used on steel valves, and as they have greater strength, they are perfect to be used for such applications that require higher pressure and/or temperature in pipelines. Also, these are ideal for all types of valves, and for use in those areas where repeated dismantling is not required.

You can easily find a reputed and well-known provider of these different types of valve end connections on the internet such as the Valtorc International. Such suppliers have various experts with them, who will help you pick the right products for your preferred areas of application.  So, contact the right manufacturer and get the most suitable valve end connections for your use.

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Posted by on in Valve 101

One of the most important aspects of using a valve for any application is to determine its right size. Ascertaining the correct size is extremely important to have adequate control of flow rate. Sizing a valve is based on a number of factors. These are pipe size, type of material, flow design, pressure drop, and so on. On the basis of all these and other such factors, you can rightly size up a valve. After all, a correctly sized valve will enhance the flow accuracy and increase the rangeability as well!

size-valvesSteps involved in determining the accurate size of a valve

  1. Ascertain the required design flow rate
  2. Determine the operating flow
  3. Choose the pipe size
  4. Identify the Maximum Pressure Drop across the valve
  5. Compute the Valve Characteristics (represented as Cv )
  6. Choose the type of valve and body size, based on the chart or table supplied by the manufacturer
  7. Check that the computed Cv does not increase the actual Cv of the chosen valve. In case it does, then you must go through the chart provided by the manufacturer once again, and select a suitable valve.
  8. Now, you should evaluate if the valve control range is right or not
  9. If the computed Cv and valve control range are now appropriate, then the valve is of the right size. However, if any of these are not suitable, then again pick up another valve from the manufacturer’s chart or table and repeat the sizing process.

It is important to understand that sizing a valve correctly is a critical process to ensure the proper functioning of the system. Even though it may seem to be a difficult technique, it is not that tough! All that is required is a little familiarity with the system and access to the right information provided by the manufacturer. It becomes all the more easier if you take the help of experts while sizing a valve.

Choosing a good and reliable supplier of valves is an essential point that you should keep in mind. This is because when you deal with the right manufacturer, you get utmost peace of mind & top quality products.

There are several companies that are operating online these days. So, you can have a look at the products being offered by them on the internet, and can pick a renowned and trustworthy supplier of valves. This way, you will be assured of excellent products, that too, without having to put a lot of effort & time!

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Posted by on in Valve 101

b2ap3_thumbnail_0108.gifBefore understanding the concept of a solenoid valve, we should first understand what a valve is.

A valve is a device which works by regulating or controlling the flow of a fluid. This fluid can be liquid, gas, slurry, etc. Valves are available in a wide variety of makes and designs, serving a variety of purposes.

Now, a solenoid valve is just the combination of a solenoid and a valve, which regulates the movement of gas or liquid by means of electric current. This electromechanical actuator stops, releases, distributes or combines fluids; and is being extensively used in a number of application areas.

Components of a Solenoid Valve

A Solenoid Valve has parts like a coil of wire (which is the Solenoid), a metal core, electrical connector, bonnet nut, body, etc. These components are necessary for the efficient functioning of the valve. In case a malfunction occurs in any of the parts, the operation of the valve will not be effective.

Hence, it should be checked regularly that all the parts are working in their best possible manner. If not, then replacement(s) might be required to ensure proper working of the valve.

Uses or Areas of Application

These engineered products are used in numerous areas. Some of the uses of a solenoid valve are as follows:

  1. Home Appliances: Be it a dishwasher or a washing machine, these appliances require solenoid valves to work efficiently.
  2. Gas Boilers: Another major use of these valves is in the gas boilers. In boilers, these valves work by controlling the flow of gas towards the burner.
  3. Automatic Irrigation Sprinkler Systems: Not just helping the homeowners of today, but these valves are quite popular in helping the agriculturists as well. The solenoid valves are used in the automatic irrigation sprinkler systems with an automatic controller or regulator.
  4. Dentistry: If you are wondering how these valves are helpful for the dentists, then don’t be amazed! The solenoid valves are used in the dentist chairs so as to regulate the air and water flow.
  5. Water Purifiers: One of the latest uses of Solenoid valves is in the water purifiers or RO water systems that are all the rage at present.
  6. Refrigeration Applications: Solenoid valves are also required in refrigeration applications to commence or restrict the flow in the refrigerant circuit, thereby automatically regulating the fluids in the system.

There are many uses of these excellent valves. However, what is important is that you choose a good supplier of such products, to ensure a long term and hassle free use for years to come. So, do a bit of research online and find a reliable manufacturer offering various types of valves.

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Posted by on in Valve 101

ACTUATOR: A fluid-powered or electrically powered device that supplies force and motion to a VALVE CLOSURE MEMBER.

AIR SET: Also SUPPLY PRESSURE REGULATOR. A device used to reduce plant air supply to valve POSITIONERS and other control equipment. Common reduced air supply pressures are 20 and 35 psig.

AIR-TO-CLOSE: An increase in air pressure to the ACTUATOR is required to cause the valve to close. This is another way of saying the valve is Fail Open or Normally Open.

AIR-TO-OPEN: An increase in air pressure to the ACTUATOR is required to cause the valve to open. This is another way of saying the valve is FAIL CLOSED or NORMALLY CLOSED.

ANSI: An abbreviation for the American National Standards Institute.

ANTI-CAVITATION TRIM: A special trim used in CONTROL VALVES to stage the pressure drop through the valve, which will either prevent the CAVITATION from occurring or direct the bubbles that are formed to the center of the flow stream away from the valve BODY and TRIM. This is usually accomplished by causing the fluid to travel along a torturous path or through successively smaller orifices or a combination of both.

API: An abbreviation for the American Petroleum Institute.

ASME: An abbreviation for the American Society of Mechanical Engineers.

ASTM: An abbreviation for the American Society for Testing and Materials.

BALANCED TRIM: A trim arrangement that tends to equalize the pressure above and below the valve plug to minimize the net static and dynamic fluid flow forces acting along the axis of the stem of a GLOBE VALVE. Some regulators also use this design, particularly in high pressure service.

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Among the two most common types of rotary valves are the ball valves and butterfly valves. Both vales have a 90 degree turn and are mainly used to control the flow of gases and liquids. There are certain features which make the ball valves better than the butterfly valves.

For a start, a ball valve can give you the perfect seal. You will not expect any leakages when the valve is fully closed. The other amazing thing about the ball valve is the fact that it turns regardless of the pressure from the supply pipe. This is a valve which will not reduce the pressure of the fluid once it is fully opened.

Ball valves are mainly used to control the flow of high pressure liquids and gas lines. This is because they do not cause any drop in pressure or restrict fluid movement when fully opened. They are mainly used when the supply pipe has an inner diameter of 6 inches or less.

Unlike butterfly valves, ball vales are used to control gas flows. This can be attributed to the fact that they provide a reliable seal unlike the butterfly valves which do not give you that perfect seal.

Ball valves do not present any trouble turning in high pressure applications. Additionally, when ball vales are used in high pressure applications, a pressure balancing scheme is not required. The same cannot be said regarding the butterfly valves.

Ball vales have a very simple structure. They are also smaller and lighter compared to many other types of valves. Ball valves give very flexible soft seals which make it very easy for one to operate them.  Ball valves give the smallest level of fluid resistance compared to all other types of valves.

You can use the valve for many years without experiencing any loss in form of leakages. This basically means that the valve is reliable and cost effective in the long term. This is the kind of valve that can be engineered to stand extremely high pressure. In fact, you will realize that high pressure systems usually have a ball valve inside them.

This allows the valve to turn the system on and shut it off as required. The ball valve can have a number of ports in it. It can allow a number of porting combinations. If you are thinking of buying the ball valve, consider these advantages prior to making your purchase.

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Posted by on in Valve 101

b2ap3_thumbnail_handwheel-tor-blog.jpgWhat is torque?
Torque is a force tending to rotate a body about an axis.
(Example): force on a wrench tending to rotate a nut around a bolt.
 
How is Torque expressed?
Torque always has two parts, force and distance, and is expressed as the product of the two.
(Example): Torque = force x distance.  Torque = pounds x feet. Torque = Newtons x meters.
 
Does that express Torque fully?
Well, not quite. Direction such as clockwise or counterclockwise must be included to express torque fully.
(Example): Torque = force x distance. Clockwise. Torque = lbft CW.
 
Why is Torque expressed as force x distance rather than distance times force?
Torque is expressed as force x distance to distinguish it from Energy which has the same units but is expressed as distance x force.
(Example): 100 lbft Torque. 100 ftlb Energy.
 
Valve Handwheel Torque and Rim Pull:
Valves are often operated by turning a Handwheel. Operating torque is applied by pulling on the Handwheel Rim. That’s called, Rim Pull. The amount of applied torque depends on the Rim Pull and the Handwheel size. Applied torque = Rim Pull x Handwheel center to Rim distance.  Or Torque = Rim Pull x Half the Handwheel diameter.  (Example): 80 lb Rim Pull on a 24 inch Handwheel: Torque = 80 lb x 24/2 in = 960 lbin or 960 lbin x ft/12 in = 80 lbft.

Tagged in: Handwheel How-To Torque
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Posted by on in Valve 101

A butterfly valve is a type of quarter turn valve. A quarter turn valve can open or close whenever the handle is turned 90 degrees (a quarter of a turn). The main function of these valves is to control the flow of liquids through a section of pipe. Butterfly valves are mainly used in waste treatment systems. They are extremely durable and need minimal maintenance.

Butterfly valves operate like other quarter turn valves. Understanding the way a basic butterfly valve works is pretty simple. It can help you to learn more about the components of valves.

Butterfly valves are made of a number of components. The most important one is the metal disc. This metal disc is the one commonly referred to as the butterfly. The butterfly is mounted on a rod and when the valve is closed it blocks passage of fluid. When the valve is fully open, the metal disc or butterfly moves a quarter turn. The passageway is unrestricted allowing fluids or air to pass.

In essence, the movement of the disc will depend on whether the valve is open or closed either partially or completely. If the valve is opened partially, it means that the disc will not be rotated a full one quarter turn, thus it cannot provide unrestricted passage. This means that, smaller amounts of fluid or air will pass through. However, if the valve is opened completely, the disc will be rotated 90 degrees then larger amounts of air or fluid will pass through.

There are many other components that form the butterfly valve. They include the resilient seat, body, packing, a stem and an actuator. The resilient seat is mounted on the body of the butterfly valve in order to provide the proper seal. The packing provides an additional seal especially in case the resilient seat is damaged.

Butterfly valves are configured differently. There are some which operate manually whereas others operate electronically depending on the system. They also come in different styles. There are those which offer high performance in systems like large pump lines and front suctions.

Butterfly vales can also be used in automobile systems. For instance, you will find the butterfly valve inside the carburetor of a car. In this case, the valve is used to control the flow of air to the car’s engine. It can partially open and close to regulate the amount of air passing through.

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Posted by on in Valve 101

b2ap3_thumbnail_butterfly-valve-article-image.jpgThere are various butterfly valves being utilized in every industry imaginable. The butterfly valve, aka quarter-turn valve, is one of the most popular and economical valves. You may not realize it, but you encounter butterfly valves on a daily basis. These valves, made of carbon steel, cast iron, stainless steel or plastic, are being utilized in many applications where assorted types of fluids, gas, air, steam are being controlled by shut-off or throttling. This valve is excellent for shut-off applications and the disk can completely block the passageway for fluids.

The body of a butterfly valve is comprised of a metal disk with a rod that runs through the disk. The rod is connected to an actuator or a manual lever which controls the disk turning it parallel or perpendicular to the flow. Depending upon the application, the disk can be made of plastic, steel, carbon steel or stainless steel. There are different options of actuators for this valve: pneumatic, electric and electro-hydraulic, manual and a gear type.

There are 3 types of butterfly valves. The standard butterfly valve is the concentric butterfly valve. The disk is metal with a rubber seat. Next, is the doubly-eccentric butterfly valve consists of various types of material for the disk and seat. This one is more of a high-performance valve. Lastly, the triply-eccentric butterfly valve (known as triple offset butterfly valve) is utilized when the application requires tight shut-off when gas or oil are involved. Being the most of expensive of the butterfly valves, the seats are typically laminated or metal in design.

Butterfly valves can be wafer or lug style. You will see wafer style valves installed when the valve is between pipe flanges. Lug style simply means that there are holes machined so that it can be bolted to the flange. These valves are typically used in HVAC applications, water systems, OEM, or irrigation for positive shut-off. Lug style will be a bit more expensive and are used at the end of the line.

When it comes to ordering butterfly valves for your specific application, you want to make sure that you are ordering from reputable and experienced company such as Valtorc International. Before you order, please know what element(s) you are dealing with, know the size needed, type of material and pressure flow, if possible. We can offer an assortment of trim features to ensure a perfect match for your particular valve needs.

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Posted by on in Valve 101

What is a V-Port Ball Valve? When it comes to ball valves, the V-port ball valve plays an important role in the valve world. This V-shaped ball or V-shaped seat is utilized with higher velocity applications that would otherwise damage a normal ball valve.  These ¼ turn control valves can be flanged or non-flanged. The seats can be rigid or flexible metal or PTFE which is a synthetic fluoropolymer better known as Teflon. The V-port ball valve is also used when precision cannot be sacrificed because corrosive liquids (clean or dirty) or gases going through the piping system need to be sustained to critical and controlled specifications.

It is imperative that you provide the following specifications to a quality and knowledgeable valve company so not to over or under-size your V-port ball valve:

  • Description of your application
  • Type & pressure of media
  • Temperature
  • Flow Rate
  • Inlet pressure
  • Line Size
  • Pressure Drop

Failure to report accurate specs can risk the success of your line. If you over-size your valve, the pressure drop will not be accurate and will affect the flow through your handling system. If under-sized, you will over work the pump on the system.

Valtorc International is a leader in the industry when it comes to the V-port ball valve. Our valves are ARRA compliant and range in size from ½” to 12” and available in carbon steel, stainless steel, brass and cast iron.

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Valve actuators are of various types namely electrically operated , pneumatically operated.

  1. Pneumatically operated actuators can be diaphragm operated for globe , gate valves.
  2. Pneumatic actuators can be quarter turn type for ball or butterfly valves.
  3. Pneumatic actuators can be cylinder operated for say Knife gate valves.
  4. Actuators are again single acting spring return type or double acting.
  5. Again electric actuators can be classified as on-off type or control ( modulating type).

On- off pneumatic actuators can be operated with solenoid valves . As you mention the fluid to be natural gas, you have to select solenoid valves which are intrinsically safe at the same time these valves may be placed at a safe distance from the valves and piping. These valves are again actuated by controllers( on -off , PID) connected to the level switches, pressure sensors or temp sensors as the case may be.

To control flow rates, you need to use a pneumatic control valve with a pneumatic positioner operating on (0.2-1 kg/cm2) with current to pressure convertor or an electroneumatic positioner ( 4-20mA control signal). These can be used to control flow rate or downstream pressure. Other elements required are pressure or flow sensors, PID controllers.

The control again depends on how the plant is operated ie DCS or PLC controlled.

If it a simple requirement then the actuatar can be made to operate on a system of limit switches. While selecting an actuator the fail safe mode ( in case of power, signal or air failure) should also be taken into consideration , which is specified by words like normally open or normally closed etc.

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Posted by on in Valve 101

If you are in the valve world at all, you know that the plug valve oftentimes gets a bad rap. There are different reasons for this. One being that the maintenance for these valves is greater than that of other valves. They need to be lubricated while out in the field and more times than not, this is overlooked.

Secondly, due to the corrosiveness and high temperatures of the substances flowing through the plug valves, they tend to wear much quicker than that of some other valves. This means they require patching and maintenance on a regular basis.

Lastly, the plug valve is not the valve of choice when it comes to throttling. You will want a v port, butterfly or ball valve in those types of applications.

On a good note, the plug valve does not clog. And one of the most common uses for a plug valve would be in our homes or businesses where we utilize gas services. The brass, 2 port valve, which is used in gas lines, is conically shaped and its structure bares a handle. When the handle is turned to 90 degrees from the inlet and outlet ports of the valve, the valve flow is shut off. For the gas to flow though the pipes, the handle and plug would need to line up with the inlet and outlet ports of the valve body.

A straightforward description of a plug valve is best described as a rotational valve with a tapered disk resembling that of a plug.This plug or disk sits “long ways” in the valve and has a passageway bored through the center in order to accommodate passing air or fluids. This type of control for corrosive or high temperature air/liquids is economical and simple. With a 2 port valve there are two positions, open and shut. There are also multi-port valves available in the plug valve for different more complex type applications. In applications where there are more than 2 ports, you may have a need for a soft rubber overlay for a sure-tight shut off.Different types of seals are based upon gaskets. Some plug valves close against the gasket and some close directly on the seat.

Many oil field service companies, vacuuming devices and applications which are dealing with glassware stopcocks which create glass products, still utilize plug valves. It does indeed seem to be a dying breed of valves, but with the right material, the proper gasket/seat in a particular application, you may see that a plug valve can be successful for you…especially when expenses plays a factor in your decision.

To assist you better with your valve decision, make sure you contact your Valtorc sales specialist today. They can better educate you on what’s best for you and your application to obtain the maximum results of success.

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Posted by on in Valve 101

We all know that valves are present in our everyday lives, but valves work a lot “behind the scenes”—controlling what might seem like the “uncontrollable”.  Without valves, we would have engineering issues on how to regulate and control steam, water, air, corrosive liquids, gases and other materials. You can already see WHY valves are important, but WHERE did valves originate, you ask? Good question…

Maybe ancient man watched the beaver as he built his dam across the river. In ancient times, man used tree trunks, thick grasses, rocks, boulders and branches to regulate water. The Egyptians and Greeks also designed valves to lead water to irrigate their crops and provide water to their villages. However, the Romans were the ones to truly develop their canal systems and had a higher engineered technology behind those systems. Due to various country invasions, one may be led to believe that the Romans stole some of their technologies that they utilized. Either way, the Romans took their technology findings on to further develop the bronze plug valve which enabled them to distribute water to buildings.

It was not until the Industrial Revolution that valves really evolved to the next level. Steam was the power required to reform and strengthen this era and replaced muscle or “horse” power. Valves along with the patented steam engine made it possible to pump water out of mines. During this time, the US was able to increasingly provide mining jobs to those out of work. Mining, agriculture, textile mills, manufacturing plants, steel production, transportation and many other industries were emerging quickly. The economy exhibited unprecedented growth and life was getting better financially for most. Water and steam along with the evolution of the valve, contributed highly to the success of the Industrial Revolution industries.

Today, there are diverse types of valves made of materials such as stainless steel, carbon steel, cast iron, bronze, brass, PVC, CPVC and other alloy materials. Valves can be very small in size or up to 102 tons, which is the largest valve in the world! (See http://www.valveworldexpo.com/cipp/md_valve/custom/pub/content,oid,1943/lang,2/ticket,g_u_e_s_t/local_lang,2)  The application determines what type of valve you would need in order for your line to be successful. When ordering your valves, you want to ensure that you work with a reputable company such as Valtorc International. They will want to know all aspects of your application to determine which type of valve(s) would be best suited for your needs. Here is something else to think about—ask the supplier/manufacturer if their products are made in the US.  Let’s strengthen our economy and keep sales in our country when we can!

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Posted by on in Valve 101

API SPEC 6D
Specification for Pipeline Valves. API Specification 6D is an adoption of ISO 14313: 1999, Petroleum and Natural Gas Industries-Pipeline Transportation Systems-Pipeline Valves. This International Standard specifies requirements and gives recommendations for the design, manufacturing, testing and documentation of ball, check, gate and plug valves for application in pipeline systems.

API 600
Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries - Modified National Adoption of ISO 10434:1998.

API 599
Metal Plug Valves - Flanged, Threaded and Welding Ends. A purchase specification that covers requirements for metal plug valves with flanged or butt-welding ends, and ductile iron plug valves with flanged ends, in sizes NPS 1 through NPS 24, which correspond to nominal pipe sizes in ASME B36.10M. Valve bodies conforming to ASME B16.34 may have flanged end and one butt-welding end. It also covers both lubricated and nonlubricated valves that have two-way coaxial ports, and includes requirements for valves fitted with internal body, plug, or port linings or applied hard facings on the body, body ports, plug, or plug port.

API 602
Compact Steel Gate Valves - Flanged, Threaded, Welding, and Extended-Body Ends. The standard covers threaded-end, socket-welding-end, butt-welding-end, and flanged-end compact carbon steel gate valves in sizes NPS4 and smaller.

API 603
Corrosion-Resistant, Bolted Bonnet Gate Valves - Flanged and Butt-Welding Ends. The standard covers corrosion-resistant bolted bonnet gate valves with flanged or butt-weld ends in sizes NPS 1/2 through 24, corresponding to nominal pipe sizes in ASME B36.10M, and Classes 150, 300, and, 600, as specified in ASME B16.34.

API 609
Butterfly Valves: Double Flanged, Lug- and Wafer-Type. The standard covers design, materials, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for gray iron, ductile iron, bronze, steel, nickel-base alloy, or special alloy butterfly valves that provide tight shutoff in the closed position and are suitable for flow regulation.

API STD 594

Check Valves: Flanged, Lug, Wafer and Butt-welding. API Standard 594 covers design, material, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for two types of check valves.

API 598
Valve Inspection and Testing. The standard covers inspection, supplementary examination, and pressure test requirements for both resilient-seated and metal-to-metal seated gate valve, globe valve, plug valve, ball valve, check valve, and butterfly valves. Pertains to inspection by the purchaser and to any supplementary examinations the purchaser may require at the valve manufacturer's plant.

API 607
Fire Test for Soft-Seated Quarter Turn Valves. The standard covers the requirements for testing and evaluating the performance of straightway, soft-seated quarter-turn valves when the valves are exposed to certain fire conditions defined in this standard. The procedures described in this standard apply to all classes and sizes of such valves that are made of materials listed in ASME B16.34.

API 6FA
Specification for Fire Test for Valves. The standard covers the requirements for testing and evaluating the performance of API Spec 6A and Spec 6D valves when exposed to specifically defined fire conditions.

ANSI/API 608
Metal Ball Valves - Flanged and Butt-Welding Ends. The standard covers Class 150 and Class 300 metal ball valves that have either butt-welding or flanged ends and are for use in on-off service.

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There are four general body styles of ball valves: single body, split body, top entry, and welded. There are four general types of ball valves: full port, standard port, reduced port, and v port.

A full port ball valve has an oversized ball so that the hole in the ball is the same size as the pipeline resulting in lower friction loss. Flow is unrestricted, but the valve is larger.

A standard port ball valve is usually less expensive, but has a smaller ball and a correspondingly smaller port. Flow through this valve is one pipe size smaller than the valve's pipe size resulting in slightly restricted flow.  In reduced port ball valves, flow through the valve is one pipe sizes smaller than the valve's pipe size resulting in restricted flow.

A v port ball valve has either a 'v' shaped ball or a 'v' shaped seat. This allows the orifice to be opened and closed in a more controlled manner with a closer to linear flow characteristic. When the valve is in the closed position and opening is commenced the small end of the 'v' is opened first allowing stable flow control during this stage. This type of design requires a generally more robust construction due to higher velocities of the fluids, which would quickly damage a standard valve.

A trunnion ball valve has a mechanical means of anchoring the ball at the top and the bottom, this design is usually applied on larger and higher pressure valves(say 4 inch and above 600 psi and above)

Manually operated ball valves can be closed quickly and thus there is a danger of water hammer. Some ball valves are equipped with an actuator that may be pneumatically or motor (electric) operated. These valves can be used either for on/off or flow control. A pneumatic flow control valve is also equipped with a positioner which transforms the control signal into actuator position and valve opening accordingly.

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