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FLOW CONTROL VALVE
Figure 10.1: Flow control valve
The flow control valve restricts or throttles the air in a particular
direction to reduce the flow rate of the air and hence control the signal
flow. If the flow control valve is left wide open, then the flow should be
almost the same as if the restrictor is not fitted. In some cases, it is
possible to infinitely vary the restrictor from fully open to completely
close. If the flow control valve is fitted with a non-return valve, then the
function of flow-control is unidirectional with full free flow in one
direction. A two-way restrictor restricts the air in both directions of
flow and is not fitted with the non-return valve. The flow control valve
should be fitted as close to the working element as possible and must
be adjusted to match the requirements of the application.
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