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E 18/E 28 SLOW-START / QUICK DUMP VALVE Specifications
Slow-start adjusting range:
1.0 to 20 seconds
Exhaust time:
1 second max. to start exhaust
Exhaust rate:
Cv 3.0
Actuating valves:
Solenoid with KR mount standard (either
24 VDC or 110 VAC). C.N.O.M.O. mount
with adapter available as an option. Any
three-way actuating valve with adapter can
be used.
The E18 and E28 Slow-Start / Quick Dump
Valves are designed as three-way quick dump
valves with a built-in slow-start capability. This
unique combination reduces the number of
components in a pneumatic circuit by combining
an electronic on/off valve with a slow-start valve
in a single unit. The E18/E28 is designed with
the same modular concept as Wilkersons 18/28
modular FRL product line and incorporates the
same modern appearance and size. The
E18/E28 also provides the same high flow rates
as the S18/S28 slow-start valves.
The slow-start portion of the valve is adjustable
and since it does not use a bleed up to
pressure system, the Wilkerson unit is truly
volume-independent. This is a unique advantage
in that this design allows any number of additions
to the pneumatic circuit without having to re-
adjust the slow-start function.
The E18/E28 will exhaust when the actuating
valve on the unit is deactivated. The valves will
exhaust on the P2 side of the unit with a Cv will
completely shut off the P1 side. Exhaust ports
are conveniently located on the rear and
downstream sides of the unit.
Features and Benefits

Modular design Modern appearance True volume independence High flow capacity Choice of 2 exhaust ports
E 18/E 28 SLOW-START /
QUICK DUMP VALVE
E 18
E 28
2.88
73
2.88
73
2.35
60
Inches
mm
2.35
60
1.79
45.5
4.79
122
4.79
122
1.79
45.5
SOLENOID
4.79
122 Ordering Information
Model Type
24V/DC N.C.
120V/60 Hz N.C.
E18
E18-02-EC00
E18-02-ED00
E18-03-EC00
E18-03-ED00
E18-04-EC00
E18-04-ED00
E28
E28-03-EC00
E28-03-ED00
E28-04-EC00
E28-04-ED00
E28-06-EC00
E28-06-ED00
The time required to reach line pressure can be regulated by
turning the adjusting screw on the front of the unit. Once this
time is set, the unit will maintain this start time regardless of
changes in volume, up to and including an open line on the
downstream (P2) side. This volume-independent rise in
secondary pressure is accomplished by balanced pistons
located inside the exhaust valve that slowly regulate the
pressure up to line pressure. This design is a departure from
bleeding through a control orifice to increase downstream
pressure, which has been the commonly used volume-
dependent approach. The Wilkerson volume-independent
design also allows for a slow, controlled rise in pressure to a
full 100% of line pressure. [This is a significant advantage over
the commonly used volume-dependent approach, where
pressure bleeds to the P2 side and suddenly jumps to line
pressure when downstream pressure reaches 40%-80% of
the upstream line pressure.] The Wilkerson volume-
independent design eliminates this problem and the potential
damage to delicate equipment that may result.
Wilkerson
Pneumatic Division
8676 E. M89 P.O. Box 901
Richland, MI 49083 USA
Customer/Technical Service
Tel: (269) 629-2550
Fax: (269) 629-2475
Web site: www.wilkersoncorp.com
Operation
Specifications
Materials of Construction
Body
Aluminum
Bottom Plug
33% glass-filled nylon
Valve Assembly
Brass/Nitrile
Springs
S.S.
Seals
Nitrile
Flow Capacity* E18
1/4
95 scfm (44,8 dm
3
/s)
3/8
101 scfm (47,6 dm
3
/s)
1/2
113 scfm (53,3 dm
3
/s)
E28
3/8
196 scfm (92,5 dm
3
/s)
1/2
210 scfm (99,0 dm
3
/s)
3/4
230 scfm (108,5 dm
3
/s)
Maximum Operating Temperature
150°F (65,5°C)
Maximum Supply Pressure
150 psig (10 bar)
Minimum Pressure
30 psig (2,1 bar)
Port Size
NPT/BSPP-G
E18 1/4, 3/8, 1/2
E28 3/8, 1/2, 3/4
Exhaust Ports
NPT/BSPP-G
E18 3/8
Right side and rear
E28 3/8
Weight
lb. (kg)
E18 2.23 (1,01)
E28 2.50 (1,14)
*Inlet pressure 150 psig (10 bar). Pressure drop 5 psid (0,3 bar).
4x M3 x 20mm
8mm Deep
2x Ø .06 (1.52 mm)
E
A
B
C
D
BUY FROM YOUR LOCAL WILKERSON DISTRIBUTOR
Detail for KR Mount Pattern Solenoid
Actuating Valve (Standard)
Ordering Information Options - To order an option supplied with the unit model, add the appropriate coded suffix letter in the designated position of the model number.
EC Solenoid Option (24 VDC) shown above. Options ED (120 VAC, 50/60) and 00 with Solenoid are also available.
Unit models are available in BSPP by placing a C in the 4th position of the unit model number.
Models
A
B
C
D
E
Standard Unit
.28
.18
.55
.28
.55
E18-XX-EC00
7.0
4.6
14
7.0
14
Standard Unit
.28
.18
.55
.28
.55
E28-XX-EC00
7.0
4.6
14
7.0
14
Dimensions
Inches
mm
9CW-UJ-206 10/04
Printed in the U.S.A.