Symbol
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.
Overview
Ratings
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) - Note: At max pressure
Maximum internal leakage
15 ml/min (0.9 in³/min) - Note: To port 3
Temperature Ratings
Operating fluid temperature
-40 to 100 °C (-40 to 212 °F) - Note: With buna N seals
-26 to 204 °C (-15 to 400 °F) - Note: With fluorocarbon seals
-54 to 107 °C (-65 to 225 °F) - Note: With urethane seals
Storage temperature
-40 to 70 °C (-40 to 160 °F)
Ambient temperature
-40 to 70 °C (-40 to 160 °F)
Operating Parameters
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
Properties
Unit weight
0.17 kg (0.37 lb)
Internal wetted surface area
141 cm² (21.8 in²)
HPB08-E40
hydraforce.com
PRESSURE REDUCING/RELIEVING CARTRIDGE VALVE PATENT PENDING
hydraforce.com
1/21/2021
HPB08-E40
Performance
Dimensions
Materials
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.
Installation Specifications
Cavity
Hvc08-e4
Cartridge installation torque
94.9 to 108.5 N-m (70 to 80 ft-lb)
Orientation restriction
None
Accessories
Seal kit
SK08-E4N-BMM - Note: Buna-N
SK08-E4V-BMM - Note: Fluorocarbon
SK08-E4U-OOO - Note: Urethane
Housings
HPB08-E40
hydraforce.com
PRESSURE REDUCING/RELIEVING CARTRIDGE VALVE PATENT PENDING
hydraforce.com
1/21/2021
HPB08-E40
Order Code
HPB08-E40
hydraforce.com
PRESSURE REDUCING/RELIEVING CARTRIDGE VALVE PATENT PENDING
hydraforce.com
1/21/2021
HPB08-E40
