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Proportional Pressure Valve Rexroth Interchangeable

Proportional Pressure Reducing Valve DRE

MANUFACTURER Genuine Huade Hydraulic
STANDARDS ISO 4401 / DIN 24340
AVAILABILITY Factory Direct Stock
Proportional Pressure Reducing Valve DRE
TECHNICAL REPLACEMENT NOTICE

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

• Product features:pressure protecting
• Specifications:Proportional Pressure Reducing Valve DRE series,
• Applications: machine tools, light industry, metallurgy,

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100% Genuine Huade Direct factory authorized supply
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ISO 4401 Mounting ISO 4401 / Rexroth interchangeable
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Secure Packaging Sealed rust-proof global shipping

Technical Data Sheet

  • Product Overview
  • Features & Applications
  • Technical Parameters

Product Overview

Huade’s proportional pressure reducing types DRE are pilot operated pressure reducing valves. They are used for the reduction of a working pressure.

Proportional pressure reducing valve DRE basically consists of the pilot valve (1) with proportional solenoid (2) main valve (3) with main spool assembly(4), as well as an optional check valve (5).

Key Features

  • Optional max.pressure protecting
  • Optional check valve between A and B
  • Valve used for reducing a working pressure
  • For subplate mounting
  • Valve and electronics from one scurce

Industrial Applications

  • DRE/DREM proportional pressure reducing valve has simple structure, convenient installation and debugging, strong flow capacity, small pressure loss, good repeatability and linearity, and is suitable for occasions with large system flow. It is widely used in machine tools, light industry, metallurgy, shipbuilding, engineering, mining, aerospace and other fields.
  • Type DRE...
  • The setting of the pressure in port A is dependent on the voltage present at the proportional solenoids (2).
  • At rest, with no pressure in port B the spring holds the main spool (4) in its start position. The connection from B to A is closed A start-up jump is, therefore avoided.
  • The pressure in port A acts via connection on the area of the main spool.
  • The pilot oil is taken from port A(NS 10) or port B(NS 20,30)and passes through the connection to the constant flow controller, which holds the pilot oil flow constant independent of pressure drops between ports A and B. From the constant flow controller the pilot oil flow passes into the spring chamber, through two connections, via valve seat into the Y port and from there into the drain line.
  • The pressure required in port A is defined at the relevant amplifier.
  • Symbols of Proportional Pressure Reducing Valve DRE

Technical Parameters

Mechanical ratings and operating limits for the Proportional Pressure Reducing Valve DRE:

Parameter / Dimension Name Value / Rating Specification
Hydraulic Hydraulic
Max.setting pressure (MPa) - ports A and B 31.5
- port Y go to tank .no pressure
Max.setting pressure, for port A (MPa) - The same as pressure rating The same as pressure rating
Min.setting pressure.for port A (MPa ) - Be related to "Q". (see curves) Be related to "Q". (see curves)
Linearity (%) - ±3.5 ±3.5
Repeatability (%) - <±2 <±2
Hysteresis - With quiver ±2.5%Pmax.without quiver ±4.5% Pmax With quiver ±2.5%Pmax.without quiver ±4.5% Pmax
Fluids - Mineral oil(for NBR seal), Phosphate ester (for FPM seal) Mineral oil(for NBR seal), Phosphate ester (for FPM seal)
Viscosity range (mm2/s) - 2.8 to380 2.8 to380
Fluid temperature range (℃) - -20 to +70 -20 to +70
Electrical Electrical
Supply voltage - DC DC
Min.control current (A) - 0.1 0.1
Max.control current (A) - 0.8 0.8
Coil resistance (Ω) - old valve at 20℃ is 19.5, Max.warm valve is 28.8 old valve at 20℃ is 19.5, Max.warm valve is 28.8
Duty - continuous continuous
Max.condition temperature(℃) - 50 50
Insulation to DIN 40 050 - IP65 IP65
Associated amplifier - Plug-in connecter Plug-in connecter
Electrical applifier - VT_2000:40(together provide) VT_2000:40(together provide)

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