Pneumatic Module - GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual

Pneumatic Module

The pneumatic module consists of an I/P and Relay assembly.
Current-to-Pressure Converter, I/P
The I/P converts a current signal to a pressure signal in the following manner. A fixed coil
creates a magnetic field proportional to the applied current. The field magnetically pulls a
flexure towards a nozzle to increase pressure on the flexure. The pressure on the flexure
increases in response to an increase in the coil current. Encapsulation of the coil provides
protection from the environment.
Single Acting Pneumatic Relay
The single acting pneumatic relay amplifies the pressure from the I/P and increases airflow as
required for stable, responsive, actuator performance. The single 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).
Figure 3 SVI FF Pneumatic Module with Single Acting Relay
26 |
BHGE
I/P Current to Pneumatic Converter
Relay
(Pneumatic Amplifier)
Vent
© 2019 Baker Hughes, a GE company, LLC. All rights reserved.