Replacing A Single Acting Pilot Relay - Flowserve Logix 520MD Plus Series User Instructions

Spool Block
Screws (2)
Spool and Clip
Spring
Spool/ Block
Assembly
Manifold
Gasket (1 of 2)
Manifold
Screws (2)
Double
Acting
Relay
Manifold
Assembly
Manifold
Gasket (2 of 2)
Manifold
O-Ring
Base
Figure 30: Double Acting Relay Assembly
Block
Figure 31: Clip Spring Orientation
© Flowserve Corporation
User Instructions - Logix® 520MD+ Series Digital Positioner
Piston
Spool
Clip
Spring
16.8 Replacing a Single Acting Pilot
Relay
Removal
1 Remove the Main Board. See procedure above.
2 Remove the two relay assembly screws.
3 Remove the single acting relay.
4 Remove the supply plug screw and o-ring.
5 Remove the Manifold gasket.
Installation
1 Place the Manifold gasket.
2 Place the supply plug o-ring and screw.
3 Place the single acting relay.
4 Place the two relay assembly screws.
5 Replace other components and calibrate.
Relay Assembly
Screws (2)
Single Acting
Relay
Supply
Plug
Screw and
O-Ring
Manifold
Gasket
Base
Figure 32: Single Acting Relay Assembly
40
Field Trial Version – Printed October 28, 2011
FCD LGENIM0105-00