Operating Manual
7.4 Automatic Pressure Relief Valve7.4 Automatic Pressure Relief Valve
7.4 Automatic Pressure Relief Valve7.4 Automatic Pressure Relief Valve
7.4 Automatic Pressure Relief Valve
Dismantling :-Dismantling :-
Dismantling :-Dismantling :-
Dismantling :-
1. Turn the Valve Lock Nut (9).
2. Turn the Valve Handwheel (5) to release
the Valve Shaft (10) and Guide (8) from
the cover.
3. Push out the Valve complete with Spring
(2) from the front cover (1).
4. Inspect and replace parts where
necessary.
Assembly :-Assembly :-
Assembly :-Assembly :-
Assembly :-
1. Lubricate 'O' Rings (3,6) and fit into the
Valve recesses.
2. Insert the Spring (2) into the Valve and
push the Valve into the Cover(1).
3. Screw Valve Locking Nut (9) and Guide
(8) onto the Valve Shaft (10).
4. Push in and turn the assembly into the
front cover (1).
Setting the Valve :-Setting the Valve :-
Setting the Valve :-Setting the Valve :-
Setting the Valve :-
Run the pump, applying pressure to the system.
If the Valve relieves at too low a pressure
increase the spring tension by winding in the
handwheel. Alternatively, should the Valve
relieve at too high a pressure wind out the
handwheel. Continue this procedure until the
correct setting pressure has been attained.
ITEMITEM
ITEMITEM
ITEM
DESCRIPTIONDESCRIPTION
DESCRIPTIONDESCRIPTION
DESCRIPTION
1 Rotorcase Cover (vented)
2 Spring
3 'O' Ring Valve Guide
4 Valve Guide Retaining Pin
5 Handwheel
ITEMITEM
ITEMITEM
ITEM
DESCRIPTIONDESCRIPTION
DESCRIPTIONDESCRIPTION
DESCRIPTION
6 'O' Ring Guide
7 Valve
8 Valve Guide
9 Lock Nut
10 Valve Shaft
19
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