Category Archives: Valves & Pumps

What Is a Flanged Ball Valve?

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Based on the ball-socket design, the ball valve is an in-line device shaped like a ball with an orifice through its center. When oriented correctly, the ball valve allows product to flow through easily. By grabbing the handle and turning the ball perpendicular or sideways, an individual can stop the flow. Found in almost every industrial environment, a flanged ball valve helps to control the flow rate through any plumbing application. The flanged ball valve is similar to the standard ball valve, but has mating connections or flanges that allow for quick and easy replacement of a damaged valve.

 

For instance, a valve without flanges would require an individual to manually cut piping and then reconnect it with a new valve in place. This reconnection can introduce additional hazards, as well as increased costs. In other words, some plumbing connections might require welding, soldering, or machining threads onto the ends of pipes for threaded applications.

 

When replacing a flanged ball valve, an individual should look for the bolted connections on either side of the valve. Loosening and removing the bolts from the flanges will allow the new ball valve to replace the broken ball valve. The modular design of flanged ball valves lends to their popularity, since a new flanged ball valve can bolt right into place of an old one. This ease of replacement is why flanged ball valves are commonly used when rapid repairs are essential.

 

A variety of flanged ball valves are available to cover nearly any application. Regulations exist to govern the varying sizes one may encounter. In the United States, for example, the American Society of Mechanical Engineers (ASME) governs the regulations, or codes. These regulations ensure that one flanged ball valve bears the same specifications as another, even if created by different manufacturers. The fact that one ASME flanged ball valve can replace another of the same size increases the interchangeability.

 

Valves come in many different configurations, such as the knobs on the kitchen sink, which are typically ball valves. These are generally found at some midpoint in a typical plumbing configuration. The best application for a ball valve is to quickly and easily stop product from flowing through pipes or plumbing, allowing for repairs to take place. A flanged ball valve has a variety of plumbing applications, mostly industrial, yet features the simple operation of the un-flanged variety, which requires merely moving a handle one quarter of a turn. In this model, flanges on either side of the actual valve make replacements of a broken valve relatively easy.

 

Wellgrow Industries Corp. is the professional ball valve and gate valve manufacturer in the industry. We offer a variety of valves likes flanged ball valve, globe valve, butterfly valve, diverter valve and so on products. If you are interested in learning further specification and details about flanged ball valve series, welcome to browse Wellgrow’s website or contact with us directly!

 

Article Source: http://www.wisegeek.com/what-is-a-flanged-ball-valve.htm

Important Components in Fluid Power Industry – Hydraulic Valves

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Hydraulic valves are essential as they help control the flow of any liquid specifically, oil, in the system. Choosing the most suitable valve(s) is crucial to any hydraulic system. It comes in different sizes and types depending on the pressure of the system as well as the flow rate.

 

3 Main Classifications of Hydraulic Valves

 

There are 3 main classifications of hydraulic – directional, pressure and flow control. Directional are used to control the fluid’s direction from the start to the end. Pressure valves however are used when a specific pressure level is required. The flow controls are used to control the flow rate of the fluid in the system.

 

Other Types

 

Aside from the main classifications, there are special hydraulic valves that are used dependent on the requirement. Some examples would be multi-block directional, modular, cartridge, electro-hydraulic servo, electro-hydraulic proportional/digital, micro-hydraulic and water pressure control.

 

Multi-block directional ones are composed of a main valve with several valves including a directional, a pressure and a check valve that is used to centralize control of the machine. The safest and most environmental friendly valve on the other hand is the water pressure valve which is used to control water in many water hydraulic systems.

 

4 Ways of Valve Installation Connection

 

Hydraulic valves are essential to a complete system. That being said, there are four different ways that valves are installed and connected – threaded, modular, sandwich plate and cartridge.

 

  1. Threaded:

These valves are usually used for small flow systems as they are lightweight. This valve is very popular and can be mounted along pipelines.

 

  1. Modular:

Modular valves are often used with modeling and pressing machines as well as with hydraulic power units. The valve makes use of valve sub-plate to connect with pipelines.

 

  1. Sandwich:

These valves are flexible as one can use it as a single unit or as part of the hydraulic oil connection. Often, the valve is sandwiched between a direction control and a sub-plate to connect with the pipe system.

 

  1. Cartridge:

Cartridges are divided into two different styles – cover plate or a two-way cartridge valve/threaded which can be two or more cartridges. The valves are made with sleeves, seat, spring, spools and sealing rings. Once all the parts are assembled, the valve is then inserted into a valve cavity. The cavity helps protect the parts inside making it suitable for heavy machine use.

 

These are just a brief overview of the different types of valves and hopefully provide readers an idea helping them make smart decisions later on.

 

Ashun was established in 1984 as a manufacturer for hydraulic and pneumatic products; we design and develop high quality and competitive hydraulic valves and pneumatic valves. We also offer customization service. Welcome to contact with Ashun to learn more information about cylinders and valves.

 

 

Article Source: http://EzineArticles.com/8967413

What is a Globe Valve and Where are They Used?

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Globe valves are linear motion valves that are widely employed to stop, start and throttle flow. In this article, we will have a simple introduction about globe valve function, advantages and disadvantages, and common applications of globe valves.

 

Globe valves are designed with a stem that moves up and down to regulate flow inside the valve, a disc (ball, composition, or plug) and seat, which is generally screwed into the valve body. Seats are designed in plane parallel or inclined to the line of the flow. These types of modulating valves are most commonly used to valve throttle, open or close flow in a system. The three basic globe valve body designs are Wye, Tee and Angle.

 

Advantages and Disadvantages of Globe Valves

 

Advantages:

 

  • Good shutoff capability.
  • Moderate to good valve throttling capability.
  • Shorter stroke (compared to a gate valve).
  • Easy to machine or resurface the seats.
  • Can be used as a stop-check valve.

 

Disadvantages:

 

  • Higher pressure drop (compared to a gate valve).
  • Requires greater force or a larger actuator to seat the valve.

 

Typical Globe Valve Applications

 

The following are some of the typical applications of globe valves:

 

  • Cooling water systems.
  • Fuel oil systems.
  • Feedwater or chemical feed systems.
  • Boiler and main steam vents and drains.
  • Turbine lube oil system and others.

 

NICO Valves Corp. is a leading industrial valve manufacturer in Taiwan and China and has been exporting this line of products for more than 20 years to all over the world.

 

We have full qualification for manufacturing widest kind of industrial valves in all common sizes & customized sizes, and available in ANSI, JIS, DIN standards. Its products includes: Gate, Globe, Check, Ball Valve, Knife Gate Valve, and Y-strainer. If you need more information about globe valves and other industrial valve series, welcome to browse NICO’s website or contact with us directly for further details!

 

 

Article Source: http://www.bmengineering.co.uk/news/globe-valves/what-is-a-globe-valve-and-where-are-they-used

 

How do Pilot Operated and Direct Operated Solenoid Valves Work?

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What are Solenoid Valves?

A solenoid valve is an electro-mechanical valve that is used to control the flow of liquid or gas. The solenoid starts by converting an electrical signal into a mechanical movement. The signal is then sent to a coil and the movement then occurs inside of the valve. Solenoid valves are usually be described as pilot operated or direct operated/acting.

 

Pilot Operated Solenoid Valves

2 way pilot operated solenoid valves have two chambers separated by a diaphragm. The upper chamber is connected to upstream through a pilot hole in either the cover or diaphragm. The media exerts a pressure that acts on the upper side of the diaphragm and keeps the valve closed. When the coil is charged the core lifts off the orifice seat allowing the operating chamber to de-pressurize. The thrust of the upstream pressure under the diaphragm continues, lifting the diaphragm and opening the valve.

 

Pilot operated solenoid valves only operate with a suitable upstream pressure differential and do not operate at zero pressure. Also a minimum pressure differential across the valve is required to keep them open or closed. Pilot operated solenoid valves can provide high flow rates at high pressures with lower power consumption.

 

Direct Acting Solenoid Valves

Direct acting solenoid valves do not use a diaphragm, their seal is part of the moving core. Two way NC direct acting solenoid valves have a spring that holds the core against the seal. When the coil is charged the spring is overcome and the seal is lifted from the orifice seat thus opening the valve and allowing the media to pass through the valve.

 

Two way NO direct acting solenoid valves have a fixed core which usually in the bottom section of the armature tube. The armature is located in the upper part of the valve. A stem passes through the fixed core and is coupled to the seal. This is held off the seal by means of a spring and makes a seal when the coil is energized, thus closing the valve.

 

Three way direct acting solenoid valves work in almost the same way as a two way direct acting solenoid valve. The fixed core has an exhaust orifice running through it. The plunger has an upper seal and lower seal allowing flow to or from either the body seat or exhaust.

 

Direct acting solenoid valves are used when there is no line pressure applied. Typical applications would include a cleaning line when a pump supplies bursts of water through the line. A direct operated solenoid valve would remain closed, even when no pressure is being applied (i.e. in between the busts of water). This is in contrast to a pilot operated valve, which requires some pressure for the valve to stay closed.

 

Excellent Solenoid Valve Manufacturer in Taiwan

SHAKO is one of leading and the largest professional pneumatic solenoid valve manufacturers in Taiwan. With rich experiences and in-deep knowledge, we are able to provide pneumatic solenoid valve products with excellent high quality & rapid service for various industries. If you need more information about solenoid valve series, welcome to visit the website of SHAKO.

 

 

Article Source: http://www.bmengineering.co.uk/news/solenoid-valves/How-do-pilot-operated-and-direct-operated-solenoid-valves-work

 

Comparisons between Variable and Fixed Displacement Hydraulic Pump

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A hydraulic drive system uses a pressurized fluid to deliver force to distant machinery. Each system has several common components; the most universal is the hydraulic pump. The pump’s purpose is to pressurize the hydraulic fluid so that it will travel down the line and perform work on the other side. In an ‘open loop’ system, the fluid is drawn from a reserve tank, and deposited into the same tank after it has done its work. In a ‘closed loop’ system, the fluid is brought directly back to the hydraulic pump after passing through a hydraulic filter.

 

Fixed Displacement Hydraulic Pump

A fixed displacement hydraulic pump has a set flow rate — every stroke of the motor moves the same amount of fluid. Fixed displacement pumps are

 

  • Simple
  • Relatively inexpensive
  • Easier to maintain

 

The simplest type of fixed displacement pump is the gear pump, in which the hydraulic fluid is pushed by rotating gears. In some models, the gears are sequential; in the quieter and more efficient version, the gears are interlocking. Another common variation is the screw pump, which uses the classic Archimedes screw, which looks much like a drill bit, to move the fluid. They have the advantage of providing a high rate of flow at relatively low pressures.

 

Variable Displacement Hydraulic Pump

In a variable displacement pump, the flow rate and outlet pressure can be changed as the pump operates. This results in variable displacement hydraulic pumps that are

 

  • More complex
  • More expensive
  • Capable of doing a wider variety of jobs

 

The most common type of variable displacement pump is the rotary vane pump, which is a variation of the gear pump in which the ‘gear’ is offset and the ‘cogs’ aren’t fixed, but rather extend and retract as the gear turns, allowing the pump to increase the pressure of the fluid by compacting it as it pushes the fluid through. The top-tier pumps, however, are bent-axis piston-and-cylinder pumps, much like the ones that are used in an internal combustion engine.

 

Simple, fixed displacement hydraulic pumps are perfect for single jobs that need to be repeated indefinitely over long periods of time; variable displacement hydraulic pumps can be used to power a wider variety of tools, but require more expense and more attention.

 

Anson is the professional intra vane fixed displacement hydraulic pumps manufacturer in Taiwan. We provide various intra vane pump series, including IVP series, IVPQ series, IVPV series, and cartridge kits and so on hydraulic pumps. Welcome to send inquiries and feel free to contact Anson for more details about fixed displacement vane pumps and more hydraulics.

 

 

Article Source: http://peerlessengineering.com/blog/hydraulic-pumps-fixed-vs-variable-displacement/

 

What Is an Air Filter Regulator?

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Certain pneumatic equipment, such as air tools, valves and actuators, needs a specific pressure to work properly. If there is low pressure, the pneumatic equipment will fail to perform or even cease to function. If the pressure is too powerful, the seal may pop up, leading to leakage, and it may even damage the equipment if it bursts. Many reputable manufacturers choose compressors with an air filter regulator unit factory-installed, which helps to reduce pressure gauge issues.

 

Purpose

Pneumatic filters, used in many industrial operations, remove contaminating fragments. These filters protect pneumatic equipment from damage that may result from these impurities, which may consist of dirt particles and aerosol or water droplets. The filters also remove impurities resulting from residue from lubricants emanating from the compressor and dust or oil vapors. Some industries may require an even cleaner environment, and therefore use a secondary pneumatic filter, which helps in the removal of impurities as tiny as 50 nanometers.

 

Function

Air filter regulators protect and service the parts installed “downstream” in compressed-air systems. Whereas the air filter removes impurities from the pneumatic system, the regulator maintains and controls the specified air pressure required for smooth and efficient working of the pneumatic equipment on which the regulator is installed. A pneumatic filter is used to achieve a clean-room atmosphere in numerous industries, including aviation, agriculture and beverage and food packaging.

 

How It Works

Pneumatic filter regulators maintain the correct pressure going into the system. Even if there is an increase in the pressure emanating from the compressor tank, the device still regulates and maintains the specified pressure. This regulating device can only bleed the extra pressure that is above the required pressure. If the pressure is low, the device cannot compensate for the difference in the required amount of pressure. This air regulator has a built-in mechanism in the form of a release valve, which helps to let out the excess pressure and prevent damage to your equipment.

 

Warning

Failures due to pneumatic system errors are rare, but when they do occur, according to the Aircraft Owners and Pilots Association, they are usually disastrous. You should be aware of your pneumatically powered systems and recognize early signs of failure. These signs can be subtle, but proper maintenance of your equipment, ensuring that you install a backup system and maintaining current knowledge of pneumatic systems can help to reduce failures.

 

SHAKO is a rapidly growing air filter regulator manufacturer and we are confident to bring expertise in providing air filter regulator and filter regulator lubricator (FRL) that will win the love of consumer and become first product of choice from the standpoint of superior technology with dependable brand name. Contact SHAKO to obtain more details about air filter regulator series!

 

Article Source: http://www.ehow.com/info_8713710_pneumatic-filter-regulator.html

Gate Valves and Different Types of Industrial Valves

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When we look at piping and pumping systems externally, we generally see the set up as a whole rather than looking at its many working components individually. But there’s that one part that plays a very crucial role. They are the valves. They act like tiny knobs regulating the flow of fluids as well as cutting off supply completely if required.

 

Industrial valves are of varied types, with each based on a different working principle and performing a different function. Right here, we’ve discussed the 9 most common types of industrial valves.

 

  1. Ball Valve – It is a hollowed out ball-shaped disk that is fitted inside a pipe. The valve starts and stops flow by the quarter turn rotational motion of this disk. When the valve is open the hollowed end is aligned in the direction of the flow and closed it sits perpendicular to the direction of the flow.

 

  1. Plug Valve – Also called cock valve, it uses a cylindrical or tapered plug with a bored passage to block, start or throttle flow. Turning the handle or wheel, arranges the hollow opening of the plug with the inlet and outlet ports opening the passage. It is blocked, when the solid part aligns itself with ports.

 

  1. Butterfly Valve – It’s yet another valve that uses the rotational motion; ball and plug valves work in the same way. It only uses a thin-disk in the flow path instead of a ball-shaped unit or a cylindrical plug. They are quick to use, extremely lightweight and easily adaptable.

 

  1. Gate Valve – This is the type of valve used in a tap. Opening and closing the valve involves raising and lowering metal gates respectively. A wedge is inserted into a seat. With gate valves, the passageway can either be fully closed or fully open; there is no in between. They are also called sluice valves.

 

  1. Globe Valve – It is similar to a gate valve in that it uses linear motion to throttle flow. It differs in its use of a disk instead of a wedge. It can also be adjusted to lower or increase flow; the advantage of a globe valve is that it does not leak as much as other valves. They are also among the most popular type of valves used across various applications.

 

  1. Pinch Valve – The construction features a pinching mechanism and a sleeve of molded rubber or synthetic material. The flow path in the open position is unobstructed. The flow is cut off by pinching the flexible membrane, by lowering a bar or gate.

 

  1. Diaphragm Valve – They work similar to pinch valves; a flexible diaphragm is inserted such that it fastens itself to the seat blocking the flow. Its advantage over pinch valves is that it creates an extremely tight seal and hence is used in applications that have a high purity requirement.

 

  1. Relief and Safety Valve – As fluids pass through the system, there is a possibility of an unprecedented increase in pressure, which if unchecked could prove hazardous. This applies especially if you are dealing with hazardous fluids. Relief and safety vales release pressure periodically, whenever it goes beyond the set point, to prevent damage.

 

  1. Check Valve – Check valves allow for unidirectional flow of fluids; they do not allow it to flow back. The non-slam nozzle check valves check pressure surge and prevent water hammer.

 

To ensure the valves fitted in your piping systems give you the best service, you should buy them from a reliable industrial valve manufacturer. It is the only way to get high quality industrial valves that are built to last.

 

Established in 1997, NICO Valves Corp. is a professional industrial valve manufacturer. We provide the widest kinds and full specification of valves. If you need more information about gate valve or other valve series, welcome to visit our website and feel free to contact NICO.

 

Article Source: http://EzineArticles.com/expert/Jovia_A._D’Souza/1830188

Article Source: http://EzineArticles.com/9460459

 

What Is a Variable Displacement Hydraulic Pump?

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A variable displacement hydraulic pump is a type of mechanical-electrical motor placed in a fluid channel. Built either to generate electrical power from the natural flow of fluid past it or to apply mechanical force to make stationary fluid flow in a pipe gives the variable displacement hydraulic pump a dual use — adjustable capability. Such pumps have versatile applications because they can be set to capture the maximum amount of hydraulic fluid energy as the velocity of fluid flow in a channel dynamically changes, or they can be switched to applying mechanical energy powered by electricity to increase fluid flow.

 

Hydraulic motors designed on the variable displacement hydraulic pump axial principle have three common features regardless of their size or the complexity of their controls. These include a central axis, a cylinder of pistons surrounding it, and a circular plate to which the ends of all of the pistons are attached. They are usually built on the axis piston pump or bent axis pump design, which allows the vertical angle at which the pistons are positioned to be adjusted either by angling the axle itself, or the plate that is attached to the ends of the pistons.

 

The circular array of pistons in a variable displacement hydraulic pump moves in unison, but they displace different amounts of fluid depending on their horizontal positions in the piston shafts in which they move. As the internal retainer plate, or external swash plate, rotates at an off-center vertical angle of 25° to 40° in the pipe, the pistons alternate between pushing fluid through an exhaust pipe, and pulling it into an intake pipe. These outlet and inlet pipes are known as kidney slots and the piston chambers are referred to as cylinder barrel bores.

 

Another key feature of variable displacement hydraulic pumps is what’s known as the compensator. This is a collection of controls often attached to the external housing of the pump, which adjusts the angle of the swash plate or retainer plate. If the swash plate is set to a perfect vertical angle on the pump as it rotates, the displacement will be zero and fluid flow will stop. Compensators can be simple or complex controls, but their purpose is to change the variable settings on the pump for maximum efficiency.

 

ANSON is a professional hydraulic pump supplier with rich experiences. We specialize in manufacturing intra vane pump, vane pump cartridge kits, variable displacement hydraulic pump, fixed displacement vane pump, hydraulic power pack pump and more. If you are interested in variable displacement hydraulic pump series, welcome to visit our website and feel free to contact ANSON!

 

Article Source: http://www.wisegeek.com/what-is-a-variable-displacement-pump.htm

 

What Is a Pneumatic Solenoid Valve?

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A pneumatic solenoid valve is a type of standard electro-mechanical solenoid that, when activated by electrical power, opens a valve under positive or negative air pressure. In standard industrial applications, they have been used for many years as a type of on/off switch for pneumatically powered systems such as with air-powered drills. They have also been commonly employed in fluid control systems such as for releasing hot and cold water into a washing tub in an automatic washing machine, or for outdoor lawn sprinkler systems.

 

The pneumatic solenoid valve differs from the traditional solenoid in that the actuator controls a valve that is under some level of pressure. It can either function to release pressure and allow gas or liquid to flow when electrical current is applied, or the pressure itself can activate the valve in reverse and create an electrical signal that is channeled to a monitoring station.

 

Some pneumatic valve assemblies are also small control units that act as triggers for larger solenoids, and together these types of pneumatic solenoid valve designs are often referred to as a pilot valve or as a compressed air pilot valve. Pilot valves can be stackable, meaning that they can be arrayed in series on a pipeline or other fluid or gas flow assembly so that pressure and flow can be channeled at key points in an industrial process. A single pneumatic solenoid valve that is installed as a pilot valve also often has a manual level of actuator control. This means that the solenoid function of the unit, where the actuator opens and closes the valve, can be controlled manually by pushing a button or moving a mechanical arm. In more sophisticated industrial systems, however, the pilot valve unit is electrically controlled through a series of programmable settings for running power to the solenoid when needed to open or close the valve.

 

In automated industrial systems where large amounts of inaccessible pipeline exist that must be controlled remotely, pneumatic solenoid valve systems are often chosen, as they can be operated by ambient pressure that builds up in the system itself and they don’t require external power. This allows them to act as a type of safety valve to release pressure when needed, and, in the process, the mechanical motion of the pressure release can activate the electro-mechanical feature of the solenoid so that a brief electrical signal is transmitted to a control station to indicate that the valve state has changed. They also serve a reverse function where they can be opened or closed from the control station if an operator determines that a system is not performing properly.

 

Solenoid valve parts can range from very small units for rapid, micro-control systems, where they have a 0.4-inch (10-millimeter) diameter and can be run on low-level direct current (DC) voltages of 12 volts. High-power industrial level valves at the opposite end of the spectrum are made of strengthened steel alloys. They can handle pressures of up to 4,500 pounds per square inch (316 kilograms per centimeter squared) and temperatures as high as 1,200° Fahrenheit (649° Celsius).

 

SHAKO is leading and the largest professional pneumatic solenoid valve manufacturer. Our solenoid valves are available in 6VDC, 12VDC, 24VDC and 110/220VAC. If you need more details about solenoid valve series, welcome to visit our website and feel free to contact us!

 

Article Source: http://www.wisegeek.com/what-is-a-pneumatic-solenoid-valve.htm

Basic Overview of Sanitary Valves – Types, Specifications, and Body Material

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Sanitary valves are designed for use in applications requiring clean or sterile processing. Sanitary valves are commonly used in dairy, food, pharmaceutical, medical, and chemical applications. Common features include easy cleaning, crevice free, and polished contact surfaces. Valve types include globe, diaphragm, pinch, knife or gate, needle, butterfly, ball, and plug.

 

Specifications

 

Important specifications when considering sanitary valves include diameter, working pressure, and operating temperature. The diameter is measured across the inlet or outlet port. The working pressure is the pressure at which the valve is designed to operate. The operating temperature is the full-required range of ambient operating temperature. Media types that sanitary valves can be configured to work with include gases, liquids, and liquids with suspended solids. The material temperature is the range of temperature that the valve can withstand and still function properly.  This relates to the media being transported, not the ambient or operating temperature outside of the system.

 

Body Material

 

The body material of sanitary valves can be metal or plastic. Metal choices include brass, bronze, copper, cast iron, ductile iron, stainless steel, and steel. Plastic choices include PVC and CPVC. Common end connections include threaded, socket-weld or butt weld, push on, solder end, clamp, grooved end, flangeless wafer-style, lugged, mechanical joint and flanged. Sanitary valve actuation types include electric, pneumatic, hydraulic, and manual.

 

ANSI Class ratings common to sanitary valves include Class125, Class 150, Class 200, Class 300, Class 600, Class 800, Class 900, and Class 1500. Other standards and specifications that sanitary valves can meet are API standards, MSS specifications, UL listings, ASME standards and federal specifications WW-V-35C.

 

If you need further details about sanitary valves and other fittings, welcome to visit our website and feel free to contact Wellgrow – the professional and high quality only stainless steel fittings manufacturer.

 

Article Source: http://www.globalspec.com/learnmore/flow_control_flow_transfer/valves/sanitary_control_valves