Masoneilan SVI II AP Installation and Maintenance ... - GE Energy
Masoneilan SVI II AP Installation and Maintenance ... - GE Energy
Masoneilan SVI II AP Installation and Maintenance ... - GE Energy
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<strong>GE</strong> Oil <strong>and</strong> Gas<br />
<strong>SVI</strong> <strong>II</strong> <strong>AP</strong> Instruction Manual<br />
Balance Pressure<br />
Actuator Piping<br />
The double-acting relay is designed to deliver pressure on both sides of a piston type<br />
actuator, so that the cylinder can provide the required thrust <strong>and</strong> stiffness. This stiffness is<br />
factory adjusted to 70% of the supply pressure. This means that, without any unbalance<br />
forces from the valve stem, both outputs deliver roughly 70% of air supply pressure.<br />
Although it is not recommended, the stiffness can be adjusted by moving the Adjustable<br />
Seat assembly up or down.<br />
Connect Output 1, labeled ACT 1 to the inlet port of the actuator in accordance with<br />
Figure 45. Output 2 labeled ACT 2 connects to the opposing actuator port.<br />
Figure 45<br />
Double Acting Positioner ATO⁄ATC Settings for Reciprocating Valves<br />
58
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