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SECTION 6 - NON-RETURN VALVE (NRV) REPLACEMENT
The parts required to replace the non-return valve are:
ITEM
QTY
ITEM
QTY
9 ‘O’-Ring
(ID 24.6 mm x 2.4 mm sec)
4
11
Non-Return Valve Assembly
(NRV)
2
10
Non-Return Valve Holder
2
14
Screws
(M4 x 16 mm)
4
•
DISASSEMBLY
To access the NRV, the flow switch body assemblies must first be removed (Fig. 32).
Please refer to the following, dependant on pump.
Note: The NRV is part of the flow switch body assemblies - see Figs. 33 & 34 for reference.
Flow Switch Assemblies:-
•
Remove screws (item 14) and lift complete assembly away ensuring no stress is placed on
the cables.
*
Flow switch body assembly
Fig. 32
*
*
Fig. 33
14
Flow switch manifold
assembly
Manifold clamp
Pump body
*
Single
Twin
