2
ES-A-ACV-LF985GD 2115
© 2021 Watts
Deep Well Pump Control Valve
Full Port Ductile Iron Dual Chamber Valve
Features
• Installed on branch of tee off main pumping header
• Normally open construction
• Discharges to atmosphere on pump start-up
• Closes slowly diverting pressure into system during pumping
cycle
• Opens slowly on pump shut-off
• Limit Switch turns pump off when valve is fully open
• Adjustable Opening and Closing Speed
• Solenoid equipped with Manual Operator
1
3
4
2(L)
CLOSES VALVE
OPENS VALVE
FLOW
5
X
X
X/Y
(Supply Pressure)
Standard Components
Options and Accessories
{
L – Dual Limit Switch
1 – Main Valve (900GD - Dual Chamber)
2 – Limit Switch
3 – 4-Way Solenoid
4 – Adjustable Opening Speed
5 – Adjustable Closing Speed
Y – Y-Strainer
X – Isolation Cocks
LEAD FREE
*
The information contained herein is not intended to replace the full
product installation and safety information available or the experi-
ence of a trained product installer. You are required to thoroughly
read all installation instructions and product safety information
before beginning the installation of this product.
NOTICE
* The wetted surface of this product contacted by consumable water
contains less than 0.25% of lead by weight.
Operation
The Deep Well Pump Control Valve is designed to minimize the
surges associated with the starting and stopping of well pumps.
The valve slowly opens and closes as required to control pumping
related surges. The pump starts and stops against an open valve.
Pump start up:
When the pump is signaled to start, the 4-Way
Solenoid is energized and directs fluid and pressure into the cover
chamber (above the diaphragm), and relieves fluid and pressure
from the power chamber (below the diaphragm). The fluid and
pressure relieved from the cover chamber is vented to atmo-
sphere or available floor drain. The valve closes at an adjustable
rate, gradually admitting pumping pressure into the distribution
system. Rate of valve closure is controlled by the adjustable clos-
ing speed control, which restricts the speed at which fluid and
pressure evacuate the power chamber. The valve remains closed
during the pumping cycle.
Pump shutdown:
When the pump is signaled to shut-off, the
4-Way Solenoid is de-energized, and directs fluid and pressure
into the power chamber (below the diaphragm), and relieves fluid
and pressure from the cover chamber (above the diaphragm). The
fluid and pressure relieved from the cover chamber is vented to
atmosphere or available floor drain. The valve opens at an adjust-
able rate, gradually reducing pumping pressure, allowing the
system check valve to slowly close. Rate of valve opening is con-
trolled by the adjustable opening speed control, which restricts
the speed at which fluid and pressure evacuate the cover cham-
ber. When the valve reaches the full open position, the limit switch
is actuated, turning the pump off.
Manual Operation:
Engaging the Solenoid Manual operator
simulates power to the solenoid, manually closing the main valve.
Disengaging the Solenoid Manual operator returns the valve to
the open position.
Series LF985GD
