Masoneilan SVI FF Instruction Manual
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© 2019 Baker Hughes, a GE company, LLC. All rights reserved.
Double Acting Positioner Description
The Double Acting (DA) relay has a pair of opposed pneumatic outputs. When Output 1
delivers air to one side of the actuator, Output 2 vents air from the opposite side of the
actuator piston. The volume of air trapped in each determines the position of the actuator.
The Action (ATO or ATC) is applied with respect to Output 1. When Output 1 is connected to
deliver air to extend the actuator, the action is ATC, on a down-seating valve.
Figure 15 Air Ports on Double Acting Positioner
Output I
Supply
Output II
Summary of Contents for Baker Hughes Masoneilan SVI FF
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