Contact Us
ABOUT PRODUCTS NEWS DOWNLOAD SEND INQUIRY APPLICATIONS CONTACT US
Proportional Directional Valve Rexroth Interchangeable

Proportional Directional Valves 4WRH

MANUFACTURER Genuine Huade Hydraulic
STANDARDS ISO 4401 / DIN 24340
AVAILABILITY Factory Direct Stock
Proportional Directional Valves 4WRH
Proportional Directional Valves 4WRH - Image 2
Proportional Directional Valves 4WRH - Image 3
Proportional Directional Valves 4WRH - Image 4
TECHNICAL REPLACEMENT NOTICE

This Huade® directional control valve serves as a 100% direct drop-in replacement for Bosch Rexroth PROPORTIONAL-DIRECTIONAL-VALVES-4WRH equivalents. Dimensions, mounting interfaces, and technical parameters are identical. Designed for cost reduction in industrial and mobile hydraulic systems.

• Product features:Spring centred .no spool drift
• Specifications:4WRH series,
• Applications:machine tools, metallurgy,

Request B2B Quote

Submit your target quantity and technical questions. Our hydraulic engineering team will provide a factory-direct quote and lead time estimate within 24 hours.

Send Product Inquiry → 📥 Download PDF Datasheet
💬 WhatsApp: +86-18217786775
✓
100% Genuine Huade Direct factory authorized supply
✓
ISO 4401 Mounting ISO 4401 / Rexroth interchangeable
✓
Secure Packaging Sealed rust-proof global shipping

Technical Data Sheet

  • Product Overview
  • Features & Applications
  • Technical Parameters

Product Overview

A single 4WRH proportional valve can control both flow and flow direction, making the system structure simple.The valve body adopts cast inner channel, with strong flow capacity and large flow rate. The main valve adopts axial triangular control groove, with small pressure drop and pressure loss on the control shoulder. Type 4WRH proportional valve is suitable for systems with large flow and high precision requirements.

Up to 10 (over 10 must install ZDR6DP2-30B/75YM)

Pilot oil volume(cm3) or spool movement 0~100%

Pilot oil flow at port X or Y (L/min) for spool movement 0~100%

Mineral oil(for NBR seal).Phosphate ester (for FPM seal)

Key Features

  • Pilot direction WRH proportional valve
  • For subplate mounting
  • For the control of both direction and flow rate of a hydraulic fluid
  • Spring centred .no spool drift
  • Low pressure drop across control lands
  • Valve and electronic control from one source
  • Proportional solenoid operation
  • Porting pattern to DIN 24 340 form A,ISO4401 and CETOP-RP121H

Industrial Applications

  • Type 4WRH proportional valve is widely used in various industries such as machine tools, metallurgy, light industry, mining, engineering, etc.
  • The type 4WRH valves are pilot operated proportional directional valves for external operation via pressure control valves.The function and principle is the same as that for valve type 4WRZ.The inter-connecting plate (12) connects the pilot connection A with connection T(Y) and pilot connection B with P(X).The pilot pressure at the main valve must be from 0.4 MPa to 2.5 MPa.so flow is either from P to A and B to T or P to B and A to T.
  • Structure of Proportional Directional Valves 4WRH
  • Pilot valve
  • The pilot valve is a proportional solenoid operated 3-way pressure reducing valve(type 3DREP6).Throttle insert are installed in port A and B,further details see the text of 3DREP6
  • Structure of pilot valve type 3DREP6
  • Symbol of Proportional Directional Valve 4WRH

Technical Parameters

Mechanical ratings and operating limits for the Proportional Directional Valves 4WRH:

Parameter / Dimension Name Value / Rating Specification
Hydraulic data Hydraulic data
size - 10 - 16 - 25 32
pilot valve pressure (MPa) - external pilot oil supply - 3 to 10 3 to 10
pilot valve pressure (MPa) - internal pilot oil supply - Up to 10 (over 10 must install ZDR6DP2-30B/75YM) Up to 10 (over 10 must install ZDR6DP2-30B/75YM)
Main valve pressure (MPa) - 31.5 - 35 35
Return pressure (MPa) - port T (external pilot oil return) - 31.5 - 25 15
Return pressure (MPa) - port T (internal pilot oil return) - 3 3
Return pressure (MPa) - port Y - 3 3
Pilot oil volume(cm3) or spool movement 0~100% - 1.7 - 4.6 - 10 26.5
Pilot oil flow at port X or Y (L/min) for spool movement 0~100% - 3.5 - 5.5 - 7 15.9
Flow through main valve (L/min) - 270 - 460 - 877 1600
Hysteresis (L/min) - 6 6
Repeatability (%) - 3 3
degree of contamination(㎛) - ≤20 ≤20
Fluid - Mineral oil(for NBR seal).Phosphate ester (for FPM seal) Mineral oil(for NBR seal).Phosphate ester (for FPM seal)
Viscosity range(mm ²/s) - 2.8 to 380 2.8 to 380
Fluid temperature range (℃) - -20 to +70 -20 to +70
Mounting position - optional optional
Weight (kg) - valve with one solenoid - 7.4 - 12.7 - 17.5 41.8
Weight (kg) - valve with two solenoids - 7.8 - 13.4 - 18.2 42.2

Related Products