Ames Fire & Waterworks 920GS-01-15 Stainless Steel Pressure Sustaining Control Valve with Solenoid (On-Off) and Hydraulic Check Feature - Manual

01/06
920 Series Model
8550 Hansen Road • Houston, Texas 77075 • (Ph) 713.943.0688 • (Fx) 713.944.9445 • www.amesfirewater.com
Operation
The AMES Model 920-01-15 / 620-01-15 Pressure Sustaining and Solenoid (On-Off) Control Valve with
Hydraulic Check Feature is designed to permit flow when upstream pressure is above the adjustable setpoint
of the control pilot, and throttle toward closed when upstream pressure falls below the adjustable setpoint.
It is controlled by a normally closed control pilot designed to: 1) Open (allowing fluid out of the main valve
cover chamber) when upstream pressure is above the adjustable setpoint, and, 2) Close (allowing fluid to
fill the main valve cover chamber) when upstream pressure is below the adjustable setpoint. An increase
in upstream pressure causes the valve to modulate toward an open position. A decrease in upstream
pressure causes the valve to modulate toward a closed position.
The Solenoid Pilot will either open to allow regulating action, or close the valve drip-tight when energized.
Specify energize to open or close the Main Valve and voltage PRIOR to ordering.
If downstream pressure becomes greater than upstream pressure, downstream pressure is admitted to
the main valve cover chamber, closing the valve and preventing reversal of flow. Normal backpressure or
sustaining operation resumes when upstream pressure exceeds downstream pressure.
When the Model 920-01-15 / 620-01-15 is located “in line” connecting two distribution zones, the valve
acts as a Pressure Sustaining Control Valve. When pressure in the upstream zone falls below the
pilot setting, the valve modulates toward a closed position, sustaining pressure in the upstream zone.
The valve will close, if necessary, until upstream pressure is above the pilot setting. The valve should be
specified to include the optional opening speed control and position indicator when used for Pressure
Sustaining applications.
PRESSURE SUSTAINING VALVE with
SOLENOID (On-Off) and HYDRAULIC
CHECK FEATURE
920-01-15
620-01-15