力士乐比例换向阀(2)

力士乐 比例换向阀

Table of contents

Contents Page

Features 2

Symbols 2

Ordering code and scope of delivery 3

Function, section 4

Technical data 6

Information on the explosion protection 7

Control electronics 7

Electrical connection 8

Characteristic curves 9

Dimensions 13

Pilot oil supply 17

Features

– Pilot operated 2-stage proportional directional valves for

controlling the flow direction and size

– Spring-centered control spool

– Actuation by means of the pilot control valve (3-way pres-

sure reducing valve)

– Solenoid coil can be rotated by 90°

– For subplate mounting:

Porting pattern according to ISO 4401 - … (information

depending on the size)

Subplates available in FE/ZN version (see pages 13 to 16)

Symbols (simplified)

with electrohydraulic actuation

Type 4WRZ…-7X./…Pilot oil supply Type 4WRZ…A.-7X./…

a

b

X = external

Y = external a

Type 4WRZ…-7X./…ET…

Type 4WRZ…A.-7X./…ET…

a b X = internal

Y = internal b