力士乐比例换向阀(17)
时间：2025-07-14
力士乐 比例换向阀
Type 4WRZ…-…/…
Pilot oil supply external
Pilot oil return external
In this version, the pilot oil is supplied from a separate pilot circuit (external).
The pilot oil return is not directed into the T channel of
the main valve, but is separately directed to the tank via
port Y (external).
Type 4WRZ…-…/…E…
Pilot oil supply internal
Pilot oil return external
In this version, the pilot oil is supplied via the P channel of the main valve (internal).
The pilot oil return is not directed into the T channel of
the main valve, but is separately directed to the tank via
port Y (external).
In the subplate, port X is to be closed.Type 4WRZ…-…/…ET…
Pilot oil supply internal
Pilot oil return internal
In this version, the pilot oil is supplied via the P channel of the main valve (internal).
The pilot oil is directly returned to channel T of the main valve (internal).
In the subplate, ports X and Y are to be closed.
Type 4WRZ…-…/…T…
Pilot oil supply external
Pilot oil return internal
In this version, the pilot oil is supplied from a separate pilot circuit (external).
The pilot oil is directly returned to channel T of the main valve (internal).
In the subplate, port Y is to be closed.
Pilot oil supply
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