air flow control valves have an adjustable metering needle and a check valve to control the flow in only one diretion.

control valve have many types.1.Angle valves 2.Angle-seat piston valves 3.Globe valves 4.Diaphragm valves 5.Rotary valves 6.Sliding cylinder valves 7.Air-operated valves

A valve signature should always be captured for a new control valve. This procedure performs a number of test and measures control air pressure, valve position and set point.

control valve repairs

These methods use different types of level control valves to manage the levels of liquids.

There are many types of control valves

T-shaped control valve has two switching positions that allow the dividing or mixing or the complete change of direction of the material flow.

There is a distinct difference between a flow-control valve and a flow restrictor. The flow-control valve restricts the flow of water to about 2.75 gals. per minute, automatically making adjustments for water-pressure changes.