CSA^® triple function air valves feature RFP (rapid filling prevention) and AS (anti-shock) technology, which help prevent water hammer in pipelines and its damaging effects.

The RFP system consists of a disc sized to reduce the air discharge flow and the rapid closing of the air valve. It also prevents water escaping quickly during closing and the valve flooding while the pipe is being filled rapidly at low pressure.

The Anti-Shock system consists of a spring and disc arrangement with sized orifices that allow the air outlet flow to be controlled.

Our hydraulic specialists recommend installing air valves with the AS system at the high points of pump discharge pipe sections, while air valves with the RFP system should be placed at changes of gradient, following the typical pumping station layout below, where we also position a surge vessel at the pump outlet:

Contact our technical specialists for any information you need about protecting equipment and pipelines in hydraulic systems.