Valves - Electro-proportional Controls - Flow Controls - With Servomechanical Feedback - Drop-in

EHPV90-G33

ELECTRO-HYDRAULIC PROPORTIONAL VARIABLE FLOW CONTROL

Overview

Description

The EHPV90-G33XX is a proportional, spool-type valve that utilizes an engineered feedback spring to feed back the spool position of a main control valve (mcv), piston pump or other piloted device, making it proportional to the input current. It is a 3rd generation, drop-in, flange mounted cartridge type valve. The coil is an integral part of the valve and is not serviceable.

Operation

The mechanical feedback spring at port 1 is connected to the mcv spool or other piloted device. Port 2 is connected to tank and port 3 (inlet) is connected to the opposite end of the mcv or other piloting device. With no current applied to the coil the valve connects port 3 to port 1, while blocking port 2. This condition causes the pressure at both ends of the mcv pilot ports to remain equal and the mcv spool will remain centered. When current is applied to the coil, the EHPV90-G33 will shift to open port 1 to port 2 and block flow from port 3 to port 1, allowing the mcv spool to shift proportionally to the applied currrent.

Features

  • Pilot control for servo-mechanical valves
  • Spring provides mechanical feedback
  • Pressurize both ends of the controlled spool for quick response and improved hysteresis
  • Economical drop-in style
  • Mounting plate option
  • Compact size
  • Top-mounted connector
Pressure Ratings
Pressure rating:
  • 45 bar (650 psi) All ports
Proof pressure:
  • 54 bar (780 psi) All ports
Burst pressure:
  • 258 bar (3750 psi) All ports pressurized
Control pressure at maximum control current:
  • 30 bar (435 psi)
Flow Ratings
Flow rating:
  • 15 lpm (4 gpm)
Maximum internal leakage:
  • 60 ml/min (3.6 in³/min) At 45 bar (650 psi)
Hysteresis:
  • 4 % PWM
Other Ratings
Cycle life:
  • 2 million cycles
Environmental rating:
  • IP69K
Corrosion protection:
  • 1000 hour salt spray per ASTM B117
Temperature Ratings
Operating fluid temperature:
  • -40 to 149 °C (-40 to 300 °F) HNBR
  • -26 to 204 °C (-15 to 400 °F) fluorocarbon
  • -54 to 107 °C (-65 to 225 °F) polyurethane
Storage temperature:
  • -40 to 70 °C (-40 to 158 °F)
Ambient temperature:
  • -40 to 80 °C (-40 to 176 °F)
Electrical Parameters
Recommended PWM frequency:
  • 150 Hz PWM
Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Unit weight:
  • 0.32 kg (0.70 lb)
Internal wetted surface area:
  • 245 cm² (38 in²)
Feedback spring parameters
Installed length:
  • 30.0 mm (1.18 in) Option A
Main control valve spool displacement:
  • 8.0 mm (0.315 in) Option A
Maximum control current:
  • 1.30 A (S12)
  • 0.65 A (S24)
Coil resistance:
  • 4.83 ohms (S12)
  • 18.35 ohms (S24)
Valve inductance:
  • 77 mH (S12)
  • 301 mH (S24)
EHPV90-G33_Perf1 EHPV90-G33_Perf2
EHPV90-G33_Dim
Cavity:
  • VC-G034 Standard configuration
Installation type:
  • Flange mounted
Orientation restriction:
  • None
Mounting screw torque:
  • 3 to 4 N-m (2.2 to 3.0 ft-lb) For standard VC-G027 Cavity
Note:
  • For retro-fitting into older drop-in cavities and other mounting options, see "Mounting-options-for-G3-valves" technical reference
Mounting plate:
  • HF P/N 4595096 Use with standard VC-G027 cavity
Mounting screws:
  • M5 X 0.8 X 12 mm long, HF P/N: 4002609 (sold separately) Use with standard VC-G027 cavity
Seal kit:
  • SK-G034-X X=seal option
Ported test body:
  • HF P/N: 71611X0
EHPV90-G33_Order
POSITION
CODE
DESCRIPTION
EHPV90-G33DG-H-J-KL
D
Feedback Spring Option
D
A
Spring option A (30 mm length, 8 mm MCV spool displacement)
G
Screen
G
BLANK
NONE
G
S
233 micron Screen
H
Line Body
H
0
No Body
J
Seal
J
G
HNBR
J
V
Fluorocarbon
J
P
Polyurethane
K
Coil Voltage
K
S12
12 VDC System
K
S24
24 VDC System
L
Coil Termination
L
EJ
E-Coil, AMP Jr.
L
ER
E-Coil, Deutsch
L
EY2A
E-Coil, Metri-Pack 150.2
U
Mounting Plate
U
BLANK
None
U
G
Standard Single Valve Plate