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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, without the complications of 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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Electric actuators mount on valves which, in response to a signal, automatically move to a desired position using an outside power source. Single-phase or three-phase AC or DC motors drive a combination of gears to generate the desired torque level.
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Electrohydraulic valve actuators and hydraulic valve actuators convert fluid pressure supply pressure into motion.
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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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Manual valve actuators do not require an outside power source. They use a handwheel or lever to drive a series of gears whose ratio results in a higher output torque compared to the input (manual) torque.
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Pinch valves includes 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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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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Pneumatic valve actuators adjust valve position by converting air pressure into linear or rotary motion.
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Rotary limit switches use physically-actuated levers to rotate a shaft and operate the contacts in a switch, making them change state.
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Valve actuators mount on valves and, in response to a signal, move a valve to a desired position using an outside power source.
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Valve positioners compare a control signal to a valve actuator’s position and move the actuator accordingly. They are used with both linear valves and rotary valves.
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