Singer Valve 106-PG Installation, Operating And Maintenance Instruction

MODEL 106/206-PG POWER OPERATED GLOBE VALVE

DESCRIPTION:

This valve is the basic component used for most Singer
Model 106/206 Automatic Valves. It is a hydraulically
operated valve.
DESCRIPTION OF OPERATION:
The valve opens when the bonnet (area above the
diaphragm) is connected to the downstream side of the
valve AND a pressure drop of 5 psi (35 kPa) is available
across the valve. The valve also opens when the
bonnet is vented to atmosphere, regardless of pressure
drop, provided that the line pressure is 5 psi (35 kPa) or
more.
The valve closes when the inlet pressure is directed to
the bonnet.
The valve can be made to modulate by varying the
bonnet pressure between inlet pressure and outlet
pressure. This is done by the pilot circuit.
In some cases the line media is unsuitable for use in
the pilot system. In these circumstances external water
pressure can be used in the pilot system. The external
pressure must be equal to or higher than the line
pressure.
If available pressure drop is less than 5 psi (35 kPa),
spring lift and external water pressure must be used
(consult factory).
Unless otherwise specified, the valve is assembled with
components suitable for water service up to 180
C). For other service conditions, contact your Singer
Valve representative.

STORAGE:

This valve must be stored indoors, away from direct
sunlight.
INSTALLATION:
Use washers under nuts when bolting valve flanges
to pipe flanges to protect the Epoxy Coating.
Control valves must be installed in a horizontal pipe
with the bonnet up. Smaller valves (6" and smaller) can
be installed in a vertical pipe if the order states the
orientation. Disassembly is difficult but not impossible in
valves installed in vertical pipe.
A stable, non-failing source of pressure is necessary to
operate a pilot operated control valve.
Sizes 1/2" to 8" (106-PG) 3" to 10" (206-PG)
Installation, Operating and Maintenance Instructions
o
F (80
IOM 224A Page 1 of 2 June 2007
Operating fluid must be clean and free of air.
Under high velocity conditions the pressure signal,
when the pick-up point is located on the main valve
inlet, may be adversely affected. As an example, a relief
valve will operate more effectively and control more
accurately if the operating pressure and sensing
pressure is connected to the header.
Ideally, six pipe diameters of straight pipe is required on
the inlet of any control valve but
•
Fully open Gate Valve can be installed on the inlet
of a valve, provided it is used as an isolating valve
and never used in partially open condition.
•
A Butterfly Valve with stem horizontal can not be
installed in the inlet of a control valve unless
operating pressure and sensing lines are connected
upstream of the butterfly valve, in a location that
gives true system pressure.
•
A Butterfly Valve with stem vertical can be
installed in the inlet of a control valve as long as
velocity does not exceed 15 ft/sec. The butterfly
valve can not be used for throttling. If problems
develop at high flows, operating pressure and
possible sensing can be connected upstream of the
butterfly valve, in a location that gives true system
pressure.
•
o A control valve can be installed with no straight pipe
on the inlet if the operating and sensing lines are
connected to a location that gives true system
pressure.
The connection point should be made at the pipe
centerline to avoid air pick-up at the top of the pipe.
1. It is possible that diaphragms may take a set
after shipping
recommended that Bonnet and Body Bolts or
Nuts be tightened after installation but before
pressurizing the valve. If a leak develops after
pressurizing,
tighten the bolts or nuts.
2. For most convenient operation and maintenance,
line isolation valves should be installed.
3. A suitable bypass should be provided to allow for
servicing of the valve without interrupting the flow.
Surrey, BC. Canada. V3W 3H9
www.singervalve.com
and storage. It is
de-pressurize the valve
th
12850-87 Avenue
Ph: 604-594-5404
Fx: 604-594-8845
highly
and