Drainage valve

Details Drainage valve Drainage valve

F - Mech Eng,Light,Heat,Weapons

16

K

137/60

F16K 15/14 (2006.01) F16K 51/00 (2006.01)

Patent

CA 1309638

IMPROVED DRAINAGE VALVE ABSTRACT A drainage valve for use in pressure systems where pressure surges occur for draining an underground water system when the water pressure in the underground water system is off and for sealing the drainage valve against drainage when the water pressure is on comprising a housing having a first annular support and sealing surface and a second annular support and sealing surface for supporting a member that is nonextrudable through a drain passage in the drainage valve under normal operating pressures and surge pressures encountered in water supply systems and to permit said nonextrudable member to open said drain passage when the water pressure is off.

602016

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