SYMBOL:
 |
DESCRIPTION
A poppet-type, screw-in, cartridge-style, spring-biased, bi-directional blocking-type hydraulic valve with two built-in checks. When used in conjunction with a small pilot solenoid valve, the EP20-S39 is ideal for either high-flow double-blocking circuits or selector circuits. The integral two-check system prevents leakage, maintaining the pilot signal regardless of the transition or the work-port pressure changes.
OPERATION
The EP20-S39 will allow flow from 1 to 2 or 2 to 1 only when 3 is vented to create a pressure drop across the internal orifice which exceeds the pressure value of the bias spring. When the element is in the neutral (closed) state, the ratio of areas 1 and 2 is 1:1, and the ratio of areas 1 or 2 to 3 is 1:2.
FEATURES
• Multiple function/application potential.
• Low pressure drop.
• Industry common cavity.
RATINGS
Max. Operating Pressure: Cartridge Only: Ports 1 & 2: 241 bar (3500 psi);
Flow: Up to 285 lpm (75 gpm)
Internal Leakage: 0.6 cc/minute (12 drops/minute) max. at 241 bar (3500 psi)
Operating Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
-26° to 204°C (-15° to 400°F) with Fluorocarbon seals;
-54 to 107°C (-65°F to 225°F) with Polyurethane 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: VC20-S3; See page 9.120.1_3w
Cavity Tool: CT20-S3xx; See page 8.600.1
Seal Kit: SK20-S3x-MM; See page 8.650.1 |
