Diesel Engine Controls

EP20-S35 — Vented Spool-Type Logic Element
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EP20-S35 Valve

SYMBOL:
EP20-S35 Valve symbol

DESCRIPTION
A spool-type, screw-in, cartridge-style, directional element, with multi-function
potential when used with other directional, pressure, or flow control devices. Can
be used as a pressure regulator for diesel engine applications including variable flow
pump controls, fuel and oil controls, SCR/EGR and exhaust controls and transmission controls.

OPERATION
The EP20-S35 is a spring-biased blocking valve which will shift to allow full flow from 1 to 2
only when pressure at 1 exceeds the cumulative pressure of 3, plus the bias spring pressure value.
EP20-S35 is a pilot-to-close directional valve. With no pressure at 3, flow will be allowed from
1 to 2 once the bias spring force is overcome with pressure at 1.

FEATURES
• Compatible with diesel fuel types 1 and 2.
• Corrosion-resistant plating.
• Stainless steel option - consult factory.
• Multiple function/application potential.
• Several bias springs available.
• Low pressure drop.
• Industry common cavity.

RATINGS
Max. Operating Pressure: 345 bar (5000 psi). Polyurethane seals are recommended for
   operation over 240 bar (3500 psi).
Flow: Up to 379 lpm (100 gpm)
Internal Leakage: 197 ml/minute (12 cu. in./minute) max. at 345 bar (5000 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 104°C (-65 to 225°F) with Polyurethane seals
Filtration: Compatible with ISO Classification 19 (25 mµ), NAS classification
Fluids: For use with common diesel fluids
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

PERFORMANCE:

EP20-S35 Performance

DIMENSIONS:
EP20-S35 Valve Dimensions

MATERIALS:

Cartridge: Weight: 0.77 kg. (1.7 lb.);
Steel with hardened work surfaces.
Zinc-plated exposed surfaces. Buna N
O-rings and polyester elastomer back-ups standard.

Ported Body: Weight: 1.65 kg. (3.65 lb.)
Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar
(3000 psi). Ductile iron bodies available; dimensions may differ.
See page 8.020.1_3w.
  ORDERING CHART:

EP20-S35 Ordering Chart

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