Shut off valve used two different ways of water pressure 


Difference to block the flow.when a channel of water pressure≥50% of another water pressure then the inlet flow will be blocked.
Main material:make form the food grade POM which with FDA quality.The material for the rubber used inside is EPDM which with  FDA approval.
The  material of metal screw is SUS 304.
Test life:water hammer 12Mpa water cycle+EPDM membrane seal with one hundred thousand times.
Inlet pressure test stress:1.5Mpa
When use this product in RO filtration system:
1.without any electricity.
2.lower cost(compare with magnetic valve)
3.simple structure,stability and no need to maintain Maximum inlet
water pressure:1.2Mpa.
Connector:insert quick connection 1/4 " 1/4" NPT 7/16 thread connector(with screw nut)
With quick fitting