Singer Valve 106-PG-BPC,206-PG-BPC Installation, Operating And Maintenance Instructions

SINGER MODEL 106/206-PG-BPC

Single Chamber, In-Line Pump Control Valve

Schematic A-7254C

Installation, Operating and Maintenance Instructions

DESCRIPTION:

Model 106/206-PG-BPC is designed for installation in
the outlet of a pump to prevent starting and stopping
surges and to act as a check valve.

Unless otherwise specified, the valve will be assembled
for service temperatures to 80 deg. C (180 deg. F).

DESCRIPTION OF OPERATION:

For operation of Main Valve (1), refer to 106/206-PG
'Operation'.

The pump is started against a closed valve. On pump
start-up, Solenoid Valve (6) is energized. Bonnet of
Main Valve (1) is vented to downstream and Main Valve
(1) starts opening. Opening speed is determined by the
setting of Opening Speed Control (7).

On shut-down, Solenoid Valve (6) is de-energized while
the pump continues to run. Inlet pressure of Main Valve
(1) is connected to the bonnet of the Main Valve. Main
Valve (1) starts closing. Closing speed is determined by
the setting of Closing Speed Control (5).

While the valve closes, the pump is kept running by
Limit Switch (11). When Main Valve (1) is almost
closed, Limit Switch (11) shuts down the pump.

Since the flow into the system is started slowly and
reduced slowly on shut-down, starting and stopping
surges are eliminated on

STOPPING OF THE PUMP

stopping surges in case of power failure. A relief valve
or anticipating relief valve should be considered to
prevent surges due to power failure.

Two Check Valves ( 4 & 8 ) in the pilot system cause
the valve to act as a check valve.

An

OPTIONAL SLIDING INNER VALVE, (DROP CHECK)

FEATURE

is available to make the valve close
immediately on flow stoppage. This makes the valve act
like a SILENT CHECK VALVE. This feature reduces
surges on power failure.

NORMAL STARTING AND

. This valve does not prevent

I.O.M. A-7254C Page 1 of 2 July 2005

12850-87th Avenue

Ph: 604-594-5404

Fx: 604-594-8845

www.singervalve.com

INSTALLATION:

Surrey, BC. Canada. V3W 3H9

1. See 106/206-PG 'Installation'.

2. Connect Solenoid Valve (6) and Limit Switch (11)
to the electrical system as directed by the engineer.
Note that the Solenoid Valve coil and Limit Switch
bracket can be rotated to facilitate wiring.

3. After installation, SLOWLY pressurize the valve
(either inlet or outlet) and vent air from the bonnet
of the Main Valve by using the Bleed Screw (item
63 on Drawing A0707A) at the Limit Switch
Adapter. Starting of the pump with air in the bonnet
will result in a surge to the system.

ADJUSTING PROCEDURE:

1. Close Opening Speed Control (7) and Closing
Speed Control (5).

2. Start the pump.

3. Open Opening Speed Control (7) slowly until
desired opening speed is achieved.

4. Turn pump switch to the 'off' position. The pump
should continue to run.

5. Open Closing Speed Control (5) slowly until desired
closing speed is achieved. Note that this valve
does not close at a constant speed. The valve will
start closing rather slowly and increases it's closing
speed as the pressure drop across the valve is
increased. The closing speed should be just slow
enough not to cause an objectionable surge at the
end of the closing cycle. Excessively slow closing
speeds should be avoided, because they make the
Closing Speed Control prone to plugging from any
silt or other solids in the water.

6. When the Main Valve is almost closed, Limit
Switch (11) should stop the pump. If the pump does
not stop, adjust the Limit Switch so that it is tripped
just before the valve is completely closed (1/8”
open).

Surrey, BC. Canada. V3W 3H9

12850-87th Avenue

Ph: 604-594-5404

www.singervalve.com

SERVICE SUGGESTIONS:

In addition to service suggestions listed under 106/206-PG, we list the following:

VALVE FAILS TO OPEN:

POSSIBLE CAUSE / REMEDY

1. Opening Speed Control (7) closed tight. Open to setting required.

2. Solenoid Valve (6) does not operate. Check wiring and solenoid valve

3. Isolating Valves (10) and / or (12) are closed. Open fully.

4. Downstream Strainer (9) obstructed. Clear obstruction.

VALVE FAILS TO CLOSE:

1. Closing Speed Control (5) closed tight. Open to required setting.

2. Solenoid Valve (6) faulty. Check wiring and solenoid valve.

3. Dirt in the pilot system. Check (2), (3), (4), (5), (6), (8).

4. Main Valve (1) diaphragm ruptured. Replace.

5. Obstruction in Main Valve (1). Remove obstruction.

6. Mineral deposits on Main Valve stem. Clean and / or use Delrin sleeves

VALVE CLOSING IS TOO SLOW:

1. See Adjusting Procedure above.

2. Additional pilot components are available to improve closing.

VALVE DOES NOT OPEN FULLY:

This valve does not open

fully and existing valves can be field modified. Contact Singer Valve or your Singer Valve representative.

fully at velocities less than about 15 ft/sec. Variations of this valve are available that do open

IOM A-7254C Page 2 of 2 July 2005

Fx: 604-594-8845