Page 3-4 Document Ref 905675-001 Rev 2
LPG Set Up WWC T1 Set Up & Maintenance Manual
3.2 LPG Hydraulic Functions
In the LPG Hydraulic section, the basic flow is regulated by a valve in the liquid line,
positioned before the break-away coupling and hose.
For additional safety, the Hydraulic Chair option is available. The Chair hydraulic block
may contain additional valves in the liquid line and vapour return line.
3.2.1 VALVES
Two types of valve are used in LPG dispensers:-
•Preset Valves
•Stop Valves
PRESET VALVE
The flow is regulated using two solenoid valves:-
•Slow flow Stop Valve (RSV1 / LSV1 in CoCa / WWC terminology)
•Normal flow Reduction Valve (RRV1 / LRV1 in CoCa / WWC terminology)
Note : Only one solenoid should be activated. Activation of both solenoids
may prevent the valve from opening completely.
STOP VALVE
The flow is regulated using a single solenoid valve:-
•Normal flow Reduction Valve (RRV1 / LRV1 in CoCa / WWC terminology)
Issue A
4 l/min
40 l/min
4 l/min
Stop Valve
Reduction Valve
40 l/min
Reduction Valve
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