Instruction Manual
D103621X012
4320
January 2018
61
Figure 35. Fisher 4320 Assembly
ON/OFF CONTROL OPTION
GE53345-C
Key
Description
13
Filter Assembly
14
Housing Gasket
15
Pneumatic Interface
16
Pneumatic Gasket
17
Spool Valve
18
Hex Socket Cap Screw
26
O-Ring
27
Hex Socket Cap Screw
59
Vent Assembly
Spool Valve and Pneumatic Gasket Installation
1. Align the five small holes on the gasket (key 16) with the five small holes on the spool valve (key 17). Inserting two
or more of the hex socket cap screws (key 18) through the spool can help to align the gasket with the spool.
2. Install the spool onto the housing, making sure that the side of the spool with three 1/4 NPT fittings is visible from
the front of the device.
3. Replace the remaining hex socket cap screws (key 18); tighten to a torque of 4.5 N•m (40 lbf•in).
Pneumatic Interface and Gasket Removal
1. Follow the above instructions to remove the spool valve and pneumatic gasket