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

Proportional Directional Valve 4WRA

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

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

• Product features:Low pressure drop across the control lands
• Specifications:4WRA series,
• Applications: control the direction

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

Type 4WRA directional control valves are direct-operated via proportional solenoids. They are widely used in various industrial hydraulic environments that require direction and flow control. Thanks to two long-term collaborations, Huade® proportional directional valves can match the same products offered by Rexroth in performance. The price of this product is relatively lower.

Frequency response(-3dB,signal ± 100%) (Hz)

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

Associated amplifier (24 V rectifier of bridge type)

Key Features

  • Direct actuated proportional valve for controlling the direction and volume flow of a hydraulic fluid
  • For subplate mounting
  • For the open loop control of both direction and flow of a hydraulic fluid
  • Spring centred control spool
  • Low pressure drop across the control lands
  • Both valve and electronic control from one supplier

Industrial Applications

  • Type 4WRA directional control valves are used to control the direction and quantity of a flow.
  • Directional control valves type 4WRA consist basically of the housing (1), the control spool (3),one or two return springs (2),and in addition one or two proportional solenoids (5).
  • Type 4WRA 6......10B/..... and 4WRA 10......10B/.....(3-position valve)
  • If the solenoids are not activated the control spool (3) is maintained in the neutral position by means of the return springs (2). Actuation of the control spool (3) is directly via the proportional solenoid (5). If, for instance, solenoid ‘A' is energized, it will push the control spool (3) to the right in proportion to the electrical signal. Connections are then made from P to B and A to T.
  • In this way,the control spool(3)causes the V-shaped grooves to open progressively to flow.When the proportional solenoid (5) is de-energised,the control spool(3) is returned to the center position by the return spring(2).
  • Structure of Proportional Directional Valve 4WRA
  • Type 4WRA ...A...10B and 4WRA ...B...10B (2-position valve)
  • The function of this valve is the same as that for valve type 4WRA.But it's 2-position directional valve with only one
  • proportional solenoid
  • Type 4WRA adopts subplate mounting ,spring center and low pressure drop across the control lands.
  • They often used in machine ,light industry ,metallurgy, mine ,space flight and other fields.
  • Structure of Proportional Directional Valve 4WRA...A... and 4WRA...B...
  • Symbol of Proportional Directional Valve 4WRA

Technical Parameters

Mechanical ratings and operating limits for the Proportional Directional Valve 4WRA:

Parameter / Dimension Name Value / Rating Specification
Hydraulic data Hydraulic data
Size - 6 10
Operating pressure(Mpa) - port A, B, P - 31.5 31.5
Operating pressure(Mpa) - port T - 16 16
Flow (L/min) - - 43 95
Degree of contamination - ≤ 20 (recommend ≤10) ≤ 20 (recommend ≤10)
Hysteresis (%) - <6 <5
Repeatability (%) - <3 <2
Frequency response(-3dB,signal ± 100%) (Hz) - 6 4
Pressure 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) - 3.8 to 380 3.8 to 380
Pressure fluid temperature range(℃) - -30 to+80 -30 to+80
Weight(kg) - Valve with one solenoid - 1.75 5.9
Weight(kg) - Valve with two solenoid - 2.5 7.5

Related Products