GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual page 28

Double Acting Pneumatic Relay
The double acting pneumatic relay amplifies the pressure from the I/P and provides a pair of
high flow output signals for operating a double acting cylinder actuator. The double acting
relay operates on any supply pressure that is at least 5 psi (.345 bar, 34.5 kPa) above the
required actuator pressure, up to 150 psi (10.3 bar, 1034 kPa). The two output pressures may
be balanced by means of an adjustable seat assembly. The average of the two pressures is
adjusted to equal 70% of the supply pressure. The double acting relay is rated for supply
pressure to 150 psi (10.3 bar, 1034 kPa).
Double Acting
Relay
Vent
Supply Inlet
Double Acting Supply Pressure Balance
After installation on the actuator, set supply pressure in accordance with actuator
specifications. Do not exceed the maximum pressure rating of the actuator. The double acting
relay is adjusted at the factory and set to 70% of supply pressure. If adjustment is required
consult the factory.
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BHGE
I/P Current to Pneumatic Converter
Output 2 Act 2
Figure 5 Double Acting Pneumatic Relay
Output 1 Act 1
© 2019 Baker Hughes, a GE company, LLC. All rights reserved.
Output 2 Gauge
Output 1 Gauge
Supply Gauge