Gallagher PULSE Series - Asco 24 V Proportional Valve; Figure 31� ASCO Proportional Valve

SERVICING
64
PULSE Installaon, Commissioning and Servicing Manual - Revision 19
6 ASCO 24V PROPORTIONAL VALVE
Disassembly
Pay attention to exploded views provided for identication of parts.
(a) Remove retaining clip, coil and spring washer from solenoid base sub-assembly.

When metal retaining clip disengages, it can spring upwards.
(b) Unscrew the solenoid base sub-assembly.
(c) Remove core assembly, core spring, guide core assembly, spring piston and bonnet
gasket.
(d) Remove bonnet screws, valve bonnet, piston assembly, lip seal, support and body
gasket.
(e) All parts are now accessible for inspection, cleaning or replacement.
Figure 31.
ASCO Proportional Valve
Reassembly
Reassemble in reverse order of disassembly.
(a) Lubricate all gaskets/O-rings with high
quality silicone grease. Replace body gasket,
core spring, core assembly and solenoid
base sub-assembly.
(b) Replace spring washer, coil and retaining
clip.
(c) After maintenance, operate the valve a few
times to be sure of proper operation.
1
2
3
4
5
6
7
8
9
10
NOTE:
Piston must ride
lipseal.
ghtly through
No. Description
1 Retaining clip
2 Spring washer
3 Spring (core asm)
4 Core asm
5 Guide (core asm)
6 Spring (piston)
7 Piston asm
8 Lip seal, piston
9 O-Ring (valve body)
10 Valve Body