Bucher C-LRV 700 - 1.3.2 Factory Settings; 1.3.3 Function

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C−LRV lift control valve Product description

13/92

300−I−9010212−E−10/08.08

1.3.2 Factory settings

All valves are factory−set to the values for the particular installation and

then tested.

S Pressure−relief valve set to the maximum working pressure

S Bypass pressure as per the calculated minimum static pressure

S Mechanical null point of the feedback sensor

S Emergency−lowering valve set to 5−10% of maximum DOWN speed

1.3.3 Description of function

The lift control valve can be subdivided into 3 main functions.

1. Up section / pressure−relief valve

S Initial position:

UP spool (16) is open in the 0 position; pump flow goes directly to

tank

S Up travel / acceleration:

UP spool (16) is progressively closed by the electro−proportional

valve (UP solenoid); this results in smooth acceleration of the lift up to

maximum speed

S Deceleration:

UP spool (16) is progressively opened by the electro−proportional

valve (UP solenoid); this results in smooth deceleration of the lift to

standstill

S Overload:

pressure−relief valve (4) and UP spool (16) open when the maximum

working pressure set with screw (1) is reached

Bucher C-LRV 700 - 1.3.2 Factory Settings; 1.3.3 Function - Up Section & Pressure Relief