The pressure sustaining valve maintains a constant upstream pressure, regardless of flow rate fluctuations. The valve will remain in the “closed” position if the upstream pressure is below the preset-point and will open once the upstream pressure exceeds the preset-point. It’s hydraulic control valve, diaphragm type, which facilitate inline maintenance.
The standard valve will be activated by the line pressure, operated by its own-medium via a pressure sustaining pilot valve, or by an external hydraulic or pneumatic pressure. The typical application of the valve will be to protect the pumps and other pipeline components
