Valves

Devices that regulate the flow of gases, liquids, or loose materials through piping by opening, closing, or obstructing ports or passageways.

Air valves allow metered fluid flow in one or both directions. They are used in pneumatic circuits to regulate the rate of activation or exhaust of cylinders and other pneumatic devices.
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Backflow preventers are assemblies consisting of two check valves and two shut off valves. These assemblies may also include test cocks for each chamber.
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Ball valves provide tight shut-off and characterizable control. They have high rangeability due to the design of the regulating element and few complications from side loads typical of butterfly or globe valves.
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Butterfly valves control flow through a circular disc or vane by turning the valve's pivot axis at right angles to the direction of flow in the pipe. They are normally used as throttling valves to control flow.
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Check valves are self-activating safety valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. 
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Control valves or proportional valves are power-operated devices used to modify fluid flow or pressure rate in a process system.
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Diaphragm valves close by means of a flexible diaphragm attached to a compressor.
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Manual or automatic devices for the accurate dispensation of fluid or granular materials.

Diverter valves direct flow from one inlet to one of two or more outlets.
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Drain valves are designed to automatically remove liquids from process lines as necessary.
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Fire sprinkler heads deliver a high-pressure flow of water or dry chemicals to a fire. They are usually are heat-activated and part of a larger fire prevention and safety system.
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Gas valves are used to handle and control the flow of gaseous media such as liquefied petroleum and natural gas. They are made of metal or plastic and vary in terms of valve size, pressure rating, number of ports, and flow.
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Gate valves and knife valves are linear motion valves in which a flat closure element slides into the media stream to shut off flow.
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Globe valves are linear motion valves with rounded bodies, from which their name is derived.  They are widely used in industry to regulate fluid flow in both on/off and throttling service. 
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Hydraulic valves contain and transfer the flow and pressure of hydraulic fluid in hydraulic power systems. They range from simple shutoff valves to precision control valves.
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Industrial valves are classified in many different ways. They can be distinguished by material of construction, media handled, and/or application.
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Mixing valves combine the flow of two or more inlets into a single outlet for applications such as temperature and concentration control.
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Needle valves are small valves used for flow control in liquid or gas services. The fine threading of the stem and the large seat area allow for precise resistance to flow.
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Pinch valves include any valve with a flexible elastomer body that can be pinched closed, cutting off flow, using a mechanism or fluid pressure.
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Plastic valves are made from plastic materials and are used in applications that require corrosion resistance and/or chemical handling.
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Quarter-turn plug valves use a cylindrical or tapered plug with a hole in the center to control straight through flow when in the open position.
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Pressure relief valves are self-actuated safety valves designed to relieve excess pressure upstream from the line.
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Sanitary valves are designed for applications requiring clean or sterile processing. 
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Servo valves provide closed loop flow or pressure response to an electrical or electronic control signal. They are used in air, gas, and liquid applications.
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Solenoid valves are devices that use a solenoid to control valve activation.
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Solids feeders are used to deliver powder, granular and other bulk solid materials along a process line, or to and from process units, storage bins, conveyors and product packaging.
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Solids valves are used to control or regulate the flow of powder, granular and other bulk solid materials along a process line, or to and from process units, storage bins, conveyors and product packaging.
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Steam valves are used to control the flow and pressure level of steam and heated water vapor.
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Tapping valves are used to isolate media within the existing line while an additional connection is made.
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Tempering valves and thermally actuated valves contain a thermal sensing component that opens or closes in response to temperature changes.
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Water control gates are used to control the mass flow of water or wastewater in various environmental and process applications.
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Water valves are designed to handle and control hot water, cold water, ground water, potable water, salt water and/or wastewater. They are made from metal or plastic.
Learn more about Water Valves