Leak Free Mixproof Valves, Types R & R_L

Seat gaskets in mixproof valves are arranged in either an axial (see Type D) or radial configuration.

Radial gaskets, as in the Type R valve, ensure that there is no emission from the cavity when the valve is activated. Radial seal mixproof valves also have a balanced lower stem to counteract pressure forces directed against the lower valve seat.

This feature makes the valve less susceptible to pressure surges. The lower seat moves in a downward direction when activating lower seat lift.