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Assembly
(Orifice included)
Orifice
Orifice Adjustment
Orifices at each of the cylinder ports (double-acting) or flow control valve (single-acting) control the flow of
gas into the actuator, and therefore, the speed at which the valve moves.
Initially, both orifices should be set at maximum value. If more precise valve positioning is required for the
application, decrease the orifice settings, one or two numbers at a time, and readjust the sensitivity. As the
valve is moving a smaller deadband may be required.
Note:
General recommendation for control, use the (4 to 1 rule) - whatever the speed of the monitor
valve is, the worker should be 4 times slower.
Figure 5 - Variable Orifice Assembly (Standard Assembly shown)
2” to 4” valves use an additional backpressure valve (metering valve).
