Valves - Pressure Controls

HPB08-E40

PRESSURE REDUCING/RELIEVING CARTRIDGE VALVE PATENT PENDING

Overview

Description

The HPB08-E40 is a screw in cartridge style, direct acting, spool type hydraulic pressure load equalizer valve with internal spring pilot chamber and spool damping chamber. It is designed to act as pressure regulating device for secondary circuits

Operation

In its steady state the HPB08-E40 blocks flow in from port 2 to port 1 and port 2 to port 3. Port 1 is control pressure, port 2 is inlet, port 3 is tank, and port 4 is signal. Port 4 receives signal from the boom cylinder. Nd port 4 is signal. Port 4 receives signal from the boom cylinder. Since port 1 and port 4 have a 1:1 ratio, signal at port 4 sets the pressure at port 1. The valve controls the pressure in the suspension accumulator by adding or removing oil from it

Features

  • High pressure operation.
  • Adjustments prohibit springs from going solid.
  • Internal spring pilot chamber.
  • Internal damping chamber. .
  • Pressure-balanced accumulator charging.
Pressure Ratings
Pressure rating:
  • 350 bar (5075 psi)
Proof pressure:
  • 517.1 bar (7500 psi)
Burst pressure:
  • 1379.0 bar (20000 psi)
Flow Ratings
Flow rating:
  • 37.9 lpm (10 gpm) At max pressure
Maximum internal leakage:
  • 15 ml/min (0.9 in³/min) To port 3
Temperature Ratings
Operating fluid temperature:
  • -40 to 100 °C (-40 to 212 °F) With buna N seals
  • -26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
  • -54 to 107 °C (-65 to 225 °F) With urethane seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
Fluids:
  • Mineral based or synthetic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 20/18/14 per ISO 4406
Unit weight:
  • 0.17 kg (0.37 lb)
Internal wetted surface area:
  • 141 cm² (21.8 in²)
HPB08-E40_Reduce-Relieve_Press
HPB08-E40_Dim

Materials

Cartridge: Weight: 0.17 kg (0.37 lb); Steel with hardened work surfaces. Zinc-plated exposed surfaces. Urethane seals recommended. aluminum knobs.

Standard Ported Body: Ductile iron (code D) bodies are required for operation over 207 bar (3000 psi). Anodized high-strength aluminum alloy, rated to 207 bar (3000 psi) also available, dimensions may differ; consult factory.

Cavity:
Cartridge installation torque:
  • 94.9 to 108.5 N-m (70 to 80 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK08-E4N-BMM Buna-N
  • SK08-E4V-BMM Fluorocarbon
  • SK08-E4U-OOO Urethane
HPB08-E40_Order
POSITION
CODE
DESCRIPTION
HPB08-E40-H-J
H
Line Body
H
0
No Body
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
U
PPDI Urethane