Hydraulic Irrigation Valve for Pressure Sustaining and Relief

A hydraulic irrigation pressure-control valve uses a water-operated control assembly to perform a selected pressure function in an irrigation network. This product offers three configurations: pressure sustaining, quick relief, and combined pressure reducing and sustaining. Choose the function around the pressure problem in your mainline or branch, then confirm the connection and operating requirements for that configuration.

Choose the pressure function

• Pressure sustaining is intended to maintain the required upstream pressure as downstream demand changes.
• Quick relief is intended to release water when pressure rises beyond the selected control setting.
• Combined reducing and sustaining control addresses downstream pressure limitation while maintaining an upstream pressure requirement.

These configurations perform different jobs. Select the function from the system design rather than from the external appearance of the valve body. The quick-relief assembly has its own configuration image; the sustaining image does not establish the components supplied with every option.

Match the valve to the network

Before ordering, confirm nominal pipe diameter, connection type and mating dimensions, normal flow, available inlet pressure and the required pressure setting. For a relief installation, also plan a suitable discharge route. A connection that looks flanged in a photograph does not establish flange drilling, face dimensions or a pressure rating for the selected configuration.

Plan access and commissioning

Allow space to reach the control assembly and inspect the small control lines. Follow the direction marking on the supplied valve and support the pipework so it does not load the body. Commission the selected function with pressure readings at the relevant points in the system, and check its response when irrigation zones open and close. Verify the supplied setting range and maintenance instructions before adjustment.