Functions:
• Pressure sustaining: maintains a minimum pressure setpoint to sustain a full pipe.
• Pressure relief: transfers excess pressure from an upstream network to a lower pressure downstream network, reservoir or outfall when upstream pressure exceeds the set value.
Sample applications:
• Maintaining a pressure setpoint (in-line mounting on pipe) in order to:
- Ensure minimum pressure at a high point or to a disadvantaged service connection.
- Avoid an excessive pressure drop when supplying a reservoir and spread reservoir filling over time.
- Maintain a minimum pressure on a pump and therefore limit flow to prevent it from working in the cavitation zone.
• When a pressure setpoint is reached, relieving pressure to an outlet (parallel mounting) in order to:
- Prevent overpressure in a network when a shutoff component is closed.
- Provide a minimum flow at a pump outlet to protect it from operating at too low flow (depending on the pump curve).
Technician corner:
• Even if it is a pressure relief valve, we recommend to install a strainer at the inlet of ACV to avoid any damages due to a piece of wood or a stone inside the control valve.
• An isolating valve installed at the inlet offers the possibility to ensure easily the maintenance if needed on the strainer.