Lined check valve only allow one way flow direction and prevent the back-flow of liquids in pipeline.
Generally check valve is automatically working, under the pressure function of one direction flow,
the disc open, while when the liquid back flows, the valve will cut flow.
The solid PTFE ball at valve body lining guarantees that ball rolls into the seat due to gravitation.
Connection method: Flange, Wafer
Lining material: PFA, PTFE, FEP, GXPO etc