Example Of Piping - Yoshitake GPK-2001 Installation & Operation Manual

5.4 Piping example
The remote pressure reducing valve can set several levels of pressure with a single pressure
reducing valve depending on how the pneumatic circuit for operation is constructed, and
automatic control is possible with a solenoid valve.
[Standard operating circuit]
The standard unit's air pressure reducing valve
inputs air pressure to the remote pressure reducing
valve to input the desired pressure. Use the manual
three-way switching valve to turn the air pressure
ON/OFF. Also, by using a three-way solenoid valve
as shown in Fig. 7, automatic ON-OFF control is
possible.
[Note]
The needle valve of the standard unit prevents pressure fluctuations due to volumetric expansion
of air heated by steam above the remote pressure reducing valve and the effects of volumetric
changes in the operating air pressure chamber. If the operating air pressure circuit is long, the
operating pressure - set pressure basic diagram will deviate slightly. In such cases, change the
operating pressure to achieve the required set pressure.
[Combination operation circuit]
Two sets of units are used, each of which
is pre-adjusted to an arbitrary air
pressure, and the pressure
corresponding to each air pressure is
output from the remote pressure reducing
valve by switching the solenoid valve.
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■EPDT-098a■