Cartridge-type faucet valve with improved seal

摘要

A cartridge-type faucet valve is provided which includes a housing with an inlet, an outlet and an insert assembly (or cartridge) seat interposed between the inlet and outlet and for cooperating with a portion of an insert assembly or cartridge to provide a seal between the inlet and outlet. The insert assembly or cartridge includes a stationary elongated sleeve and a stem mounted within the sleeve which is longitudinally movable over a range of travel between a closed position and a fully open position. One section of the stem co-acts with the sleeve to control the longitudinal position of the stem. Another section of the stem cooperates with an internal surface portion of the sleeve to provide a longitudinally extending flow passage for communicating from the inlet to the outlet. A seal piece is mounted on the stem and is adapted for engagement with a stationary seating surface adjacent one end of the sleeve. In operation, the seal piece is engaged with the seating surface only in the closed position for preventing flow to the flow passage. The insert assembly or cartridge further includes a seal interposed between the two above-mentioned stem sections for isolating the first mentioned section from the flow passage. The insert assembly or cartridge also includes a deformable seal for providing static sealing engagement with the insert assembly seat, the seal adapted to be in deformed static compression against the insert assembly seat when the insert assembly is assembled with the housing.