DIRECTIONAL VALVES
EP20-S39 Vented Poppet-Type Logic Element
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-fl ow 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 fl ow from ➀ to ➁ or ➁ to ➀ only when ➂ is vented to create
a pressure drop across the internal orifi ce which exceeds the pressure value of the
bias spring. When the element is in the neutral (closed) state, the ratio of areas
➀ and
➁ is 1:1, and the ratio of areas ➀ or ➁ to ➂ is 1:2.
FEATURES
• Multiple function/application potential.
• Low pressure drop.
• Industry common cavity.
RATINGS
Maximum Operating Pressure: Cartridge Only: Ports ➀ & ➁, 241 bar (3500 psi)
Flow: See Performance Chart
Internal Leakage: 0.6 ml/minute (12 drops/minute) max. at 241 bar (3500 psi)
Internal Orifi ce: 0.79 mm (0.031 in.)
Temperature: -40 to 120°C with standard Buna 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
Cavity Tool: CT20-S3xx; See page 8.600.1
Seal Kit: SK20-S3x-MM; See page 8.650.1
SYMBOL
4.515.1
PERFORMANCE (Cartridge Only)
2
3
1
13.8/200
11.0/160
76
20
38
10
151
40
114
30
227
60
189
50
FLOW lpm/gpm
PRESSURE DROP bar/psi
303
80
265
70
➀ to ➁ – – –; ➁ to ➀ ——
Fully open and with port ➂ vented
32 cSt/150 sus oil at 40°C
5.5/80
8.3/120
2.8/40
1
2
3
USASI/ISO:
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.Blue rectangles are links to other catalog pages.
Cartridge: Weight: 0.84 kg. (1.85 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Standard Ported Body: Weight:
1.65 kg. (3.65 lbs.) Anodized
high-strength 6061 T6 aluminum
alloy, rated to 207 bar (3000 psi).
Ductile iron can be made available;
dimensions may differ. See page
8.020.1.
MATERIALS TO ORDER
EP20-S39 - __ __ __ - __ - 160
EP20-S39
4.515.2
Porting
Cartridge Only 0
SAE 16 w/SAE 6 Pilot Port 16T
DIMENSIONS
Seals
N Buna N (Std.)
V Fluorocarbon
P Polyurethane
Bias Spring
160 11.0 bar (160 psi)
MILLIMETRE
INCH
ORIFICE DISCS SHOULD NOT
BE USED WITH THIS PRODUCT
2.48
63.0
4.00
101.6
1.87
47.5
1.35
34.4
3.03
76.9
0.19
4.8
4.38
111.3
5.00
127.0
3
0.81
20.6
3.62
91.9
1
2
0.34
8.6
2.00
50.8
1.88
47.6
ACROSS FLATS
TORQUE: 70 ft-lbs
(95.0 Nm) max.
1
2
3
with Two Built-In Checks
®
HYDRAFORCE
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
