Dwyer SVT User Manual
Series SVT Solenoid Valve Enclosure with Timer
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Specifications - Installation and Operating Instructions
Bulletin V-SVT
The Series SVT Solenoid Valve Enclosure with Timer is a
compact, reliable and economic package designed for small to
medium filtration systems. It combines a timer board and
solenoid valve enclosure into one package, eliminating the need
for separate enclosures and wiring. The SVT is available with 2,
4 or 6 valves. For larger systems expansion modules can be
daisy chained to the SVT for a maximum of 60 outputs. The
universal power supply accepts 90-240 VAC at either 50 or 60
Hz for both domestic and international requirements. OnDemand Cleaning or Down Time Cleaning functions can be
selected with a simple dip-switch. Time-On and Time-Off
settings are selected using two potentiometers.
For on demand systems, a Dwyer
®
A3000 Photohelic®gage or
Series 1950 pressure switch may be used with the SVT.
APPLICATIONS
• Dust Collection
• Pneumatic Conveying
• Down Draft Tables
• Industrial Vacuums
Installation
Warning: Before installation make sure all air
pressure has been released, electric power has been
turned off, and air pressure sources have been
closed. Turn power on and increase pressure only
after installation in completed.
Location
Select a location that will not exceed the ambient temperature
specifications. The system must be located in area that meets
enclosure ratings. The SVT can be mounted in any position. For
optimum life and performance it is recommended that the unit is
mounted horizontal and upright to reduce the chance of foreign
matter accumulating in the valves.
SPECIFICATIONS
Service: Compatible gasses, filtered and oil free.
Wetted Materials: Brass (pilot body), 302 SS (spring), NBR
(diaphragm).
Temperature Limits: 14 to 140°F (-10 to 60°C).
Pressure Limit: 145 psi (10 bar).
Power Requirements: SVT: 90 to 240 VAC, 50 to 60 Hz;
SVT-DC: 24 VAC/VDC ±18%.
Power Consumption: 25 VA.
Fuse: 0.5 A delayed.
Electrical Connection: 2 DIN 43652 connectors.
Enclosure Rating: NEMA 4X (IP65).
Enclosure Material: Polyamide with carbon fiber,
polycarbonate, TPE rubber.
Process Connection: 1/4˝ OD Push to Connect.
Mounting Orientation: Any position.
On-Time: 150 msec to 700 msec.
Off-Time: 4 seconds to 210 seconds.
Pneumatic Connections
Verify that the supply pressure is within the required
specification. Do not turn on the system before installation is
complete. Make sure that there is no dirt or other particles
between the RDCV diaphragm valve and the connections of the
SVT remoted solenoid valve, which would cause a restriction of
airflow. There should be no condensed water in the piping. The
use of a filter may be required to avoid this problem. Leak
testing should be done prior to installation only.
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
Wiring Connections
POWER SUPPLY
GROUND TERMINAL
CONTROL
AND
TIMER
SETTINGS
PIN 1-2: EXPANSION MODULE
PIN 3-4: SWITCH INPUT
1
43
2
L
N
P
O
W
E
R
L
N
The SVT is used in conjunction with an external pressure switch
or relay for on-demand cleaning or down-time cleaning. A simple
on-off system can be established with a single pressure switch
connected to pin 3-4. A Dwyer
®
Photohelic®high and low limit
switch gage can be used to achieve better control. These
switches must be isolated contact. The common must not be
connected to the equipment contacts or protected ground, since
hese may introduce electrical noise and cause improper
t
operation or possible damage to the control relays. See Figure
1.
Wiring SVT/SVTE (2 DIN Connectors)
1. Remove center screw and pull wiring assembly from
body.
2. Remove gasket and place small screw driver in slot to pry
out the terminal block from the body.
3. Thread wire through the gland nut, gland gasket, washer
and connector cover.
4. Connect wires to proper terminals on the terminal block.
5. Snap terminal block back onto the body. Reinstall the
center screw and screw back into the SVT/SVTE body.
Note: Do not change the power supply DIN (Black) with the
switch input DIN (Gray). The black DIN connector is specially
designed for the power supply, changing DIN connectors can
damage the SVT/SVTE.
Figure 1
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