LF920GD-01
Ductile Iron Pressure Sustaining or Backpressure Control Valve with Hydraulic Check Feature
The LF920GD-01 (Globe) and LF920AD-01 (Angle) Series is designed to permit flow when upstream pressure is above the adjustable setpoint of the control pilot, and throttle when upstream pressure falls below the adjustable setpoint. The valve closes drip-tight when downstream pressure becomes greater than upstream pressure. When installed in line on the discharge of a pump, the valve acts as Backpressure Control and Check Valve. When pump discharge pressure falls below the pilot setting the valve throttles to increase backpressure against the pump. When the pump is turned off, the valve acts as a Hydraulic Check Valve, preventing reverse flow. When installed in line connecting two distribution zones, the valve acts as a Pressure Sustaining Control Valve. When upstream pressure falls below the pilot setting the valve throttles to sustain pressure in the upstream zone, and closes drip-tight when downstream pressure becomes greater than upstream pressure.
Features
- Permits flow when upstream pressure is above the adjustable setpoint of the control pilot, and throttle when upstream pressure falls below the adjustable setpoint
- Depending on installation location, the valve serves as a Backpressure Control Valve or Pressure Sustaining Control Valve
- Hydraulic Check Feature prevents flow reversal
- Closing speed and pressure setpoints are adjustable
Literature
Approval/Certification Information
For product-specific approval information, please refer to the product’s specification sheet (see literature section above) or ask a Watts representative. For general information regarding any approval certification partners identified in the specification sheet, please visit our certification partners’ websites:
| ASSE | CSA | FM Approvals | NSF |
| UL | ULC | USC | WQA |