Air valve

STF air relief valves allow air to escape the system on it’s initial start up until the system is full of water. Once full the valve automatically closes until the cycle is finished and then allows air to flow back into the system.  

The air release valve helps in avoiding clogging of emitters due to back suction and will extend the long term life of the system. They also help to avoid water hammer at the start of a watering cycle.

Automatic back flush valve

Back-flushing valve is controlled manually, electrically or by remote pressure command to change position and connect the outlet and drain ports during the back-flushing cycle. The valve returns to its normal position- connecting the inlet and outlet ports as flushing cycle ends

Pressure sustaining valve

Hydraulically operated, diaphragm actuated control valves that sustain minimum preset upstream pressure regardless of fluctuating flow or varying downstream pressure. Pressure sustaining valve that releases excess flow from the system. It either opens or shuts in response to a remote pressure commands.

Pressure relief valve

Pressure reducing valve maintains a preset downstream pressure, regardless of upstream pressure or flowrate fluctuation. A spring-loaded diaphragm inside the pilot moves according to the downstream pressure changes. The pressure fluctuations are compensated by gradual opening and closing of the valve.