Directional Valves — HyPerformance

HEV12-S38 — Multi-Function Piloted Directional Valve
   Selection guide - similar valves.
   PDF file of this page.
   Request a quote.

HEV12-S38 Valve

SYMBOL:
HEV12-S38 Valve symbol

DESCRIPTION
A high pressure poppet-type, screw-in, cartridge-style, spring-biased, blocking-type hydraulic
directional element, with a built-in check. When used in conjunction with a small pilot solenoid
valve, the HEV12-S38 valve is ideal for blocking or for selector circuits.

OPERATION
The HEV12-S38 will allow flow from port 1 to port 2 only when port 3 is vented to create a pressure
drop across the internal orifice which exceeds the pressure value of the bias spring. With port 3 under
pressure, the valve will allow flow from port 2 to 1 when pressure at port 2 exceeds the cumulative double
pressure at port 3 and bias spring value. When the valve is in the neutral (closed) state, the ratio of areas
port 1 and 2 is 1:1 and the ratio of areas port 1 to 2 or port 3 is 1:2.

FEATURES
• Multiple function/application potential.
• Smooth shift transition.
• 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%.

RATINGS
Operating Pressure: 350 bar (5075 psi); 10% cycle life: 420 bar (6090 psi)
   Note: All HyPerformance products are tested for 900K cycles at 350 bar and 100K at 420 bar.
Fatigue Rating: 1 million cycles at 459 bar (6650 psi)
Burst Pressure: 1380 bar (20000 psi)
Proof Pressure: 690 bar (10000 psi)
Flow: 114 lpm (30 gpm)
Internal Leakage: 5 drops/min. max. at 350 bar (5075 psi)
Cycle Life: One million cycles
Operating Temperature: -54° to 107°C (-65° to 225°F) with Urethane seals
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
   7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: HVC12-S3; See page 9.112.1_3w
Cavity Tool: HCT12-S3xx; See page 8.600.1
Seal Kit: SK12-S3U-00; See page 8.650.1

PERFORMANCE:

HEV12-S38 Performance Charts
  DIMENSIONS:

HEV12-S38 Dimension drawing

MATERIALS:

Cartridge: Weight: 0.33 kg. (0.72 lbs.) Steel with hardened work surfaces. Zinc-plated exposed surfaces. Urethane seals without back-up rings standard.
  ORDERING CHART:

HEV12-S38 Ordering Chart

Selection guide - similar valves.
PDF file of this page. Request a quote.