Page 40 - Linde - VT1 Modular, modular system for LSC manifold valve plates

4 | System components. Directional control valves variants. Distinction

Directional control valve with standard function type C — symmetrical function with A-B-tank
connection, direction control valve types

The following directional control valves are available:
>> 25W1 VW25-CF25 for NG25 functions with hoist function
>> 25W2 VW25-CF25 for NG25 functions with hoist function
>> 30W VW30-CF25 for NG30 functions with hoist function
These directional control valves are usually used for slewing gear or hoist directional control valves or for mobile vehicles with an
external brake valve. They have symmetrical flow distribution between ports A and B. In the zero position, ports A and B are open
to the tank. In addition, in both function ports, there is a pressure relief valve with anti-cavitation function.

>> Hydraulic actuation (pilot pressure max. 32 bar) is realized with the ports provided on the covers of the VW directional
control valves. Hydraulic opening begins at 7.5 ±0.5 bar (pump-to-function). *
>> Electro-hydraulic actuation is realized with the electro-proportional pressure reducing valves. Electro-hydraulic opening
beings at I= 430 ±10mA. *
>> The necessary pilot pressure (max. 32 bar) comes from the Pst port on the VT1EE.
* A volume of approx. 1 l/min flows from the pump to the function
Each VW directional control valve is configured with the following characteristics:
>> Flow characteristic of the valve spool
>> Other responses: see replacement parts.

Directional flow A / B DBV NLV
control valve at DpLS=20 bar in bar
25W1 360 / 360 380 No
25W2 240 / 240 380 No
30W 560 / 560 380 No

circuit diagram

VW25-CF25 with DBV VW30-CF25 with DBV

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