Valve seals, including safety seals in the valve housing, peripheral walls connected to the valve seals, openings extending through the valve outer walls, and dams at least partially surrounding the dock. There are air holes and valves.

摘要

Valve Sealing Member includes a Sealing Member secured within a housing with a Valve Member attached to a peripheral wall for closing the valve.An Opening which extends through the peripheral wall, and a Dam, which at least partially surrounds the opening; and a Valve.