Valves - Directional Controls - Logic Element - Pilot to Close

HEP42-S35

DIRECTIONAL ELEMENT, PILOTED

Overview

Description

The HEP42-S35 is a high pressure, spool type, screw-in, cartridge style, hydraulic directional element, with multi-function potential when used with other directional, pressure or flow control devices

Operation

The valve is a spring-biased blocking valve which will shift to allow full flow from port 1 to 2 only when the pressure at port 1 exceeds the cumulative pressure of port 3, plus the bias spring pressure value. The HEP42-S35 is a pilot-to-close directional element. With no pressure at port 3 flow will be allowed from port 1 to 2 once the bias spring force is overcome with pressure at port 1

Features

  • Multiple function/application potential.
  • Low pressure drop.
  • All HyPerformance products are tested to the rigorous standards of the NFPA specification T2.6.1.
  • All HyPerformance valves are tested at a verification level of 90% and an assurance of 99%.
Pressure Ratings
Pressure rating:
  • 350 bar (5075 psi)
  • 420 bar (6090 psi) 10% cycle life
Proof pressure:
  • 690 bar (10000 psi)
Burst pressure:
  • 1380 bar (20000 psi)
Flow Ratings
Flow rating:
  • 379 lpm (100 gpm)
Maximum internal leakage:
  • 164 ml/min (10 in³/min) At 350 bar (5075 psi)
Other Ratings
Cycle life:
  • One million cycles
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 90 °C (-40 to 194 °F)
Fluids:
  • Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range:
  • 7.4 to 420 cSt
Maximum operating contamination level:
  • 18/16/13 per ISO 4406
Unit weight:
  • 1.04 kg (2.30 lb)
Internal wetted surface area:
  • 484 cm² (75 in²)
HEP42-S35_Perf_Dim

Materials

Cartridge: Weight: 1.04 kg. (2.30 lbs.); Steel with hardened work surfaces. Zinc-plated exposed surfaces; PPDI Urethane seals and no backup rings standard.

Ported Body: Weight: 9.03 kg. (19.9 lbs.); H-series ductile iron standard. Rated to 345 bar (5000 psi).

Cavity:
Cartridge installation torque:
  • 394 to 420 N-m (290 to 310 ft-lb) Steel/ductile iron cavity
  • 298 to 311 N-m (220 to 230 ft-lb) Aluminum cavity
Orientation restriction:
  • None
Seal kit:
  • SK42-S3N-MM Buna N
  • SK42-S3V-MM Fluorocarbon
  • SK42-S3U-OO Urethane
HEP42-S35_Order
POSITION
CODE
DESCRIPTION
HEP42-S35-H-J-R
H
Line Body
H
0
No Body
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
U
PPDI Urethane
R
Spring
R
20
20 psi Bias Spring
R
50
50 psi Bias Spring
R
80
80 psi Bias Spring
R
175
175 psi Bias Spring