Wenderoth, Lind & Ponack
Pressure compensation valve
 A pressure compensation valve is capable of distributing of an output pressurized fluid of single pressurized fluid supply source to a plurality of hydraulic loads. The pressure compensation valve is constructed with a check valve portion formed by providing, in a valve body, a valve for establishing and blocking communication between an inlet port and an outlet port, and a pressure reduction valve formed by providing, in the valve body, a spool establishing communication between a second port and a third port by a pressure in a first pressure chamber communicating with a first port and blocking communication between the second port and the third port by a pressure in a second pressure chamber communicating with the third port. The spool is biased in a direction for blocking communication between the second port and the third port by a spring while contacting the valve. 
Kabushiki Kaisha Komatsu Siesakusho
E F E E Y Y Y E
E02F F15B E02F E02F Y10T Y10T Y10T E02F
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Kazunori Masamitsu Kazuyoshi
Ikei Takeuchi Ishihama