GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual page 42

Balance Pressure
The double-acting relay is designed to deliver pressure on both sides of a piston type actuator,
so that the cylinder can provide the required thrust and stiffness. This stiffness is factory
adjusted to 70% of the supply pressure. This means that, without any unbalance forces from
the valve stem, both outputs deliver roughly 70% of air supply pressure.
Although it is not recommended, the stiffness can be adjusted by moving the Adjustable Seat
assembly up or down.
SVI FF Double Acting Assembled
42 |
BHGE
Pneumatic Train and
,
Cover (I/P Module
Relay)
I/P
Relay
Figure 16 SVI FF Double Acting Components
SVI FF Cover
Manifold
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