Patent ID: 6991000
Filing Date: 2006-01-31
Classification: B05C,F16K,Y10T

Abstract:
1. Apparatus for dispensing a liquid comprising: a manifold having a high pressure passageway adapted to be coupled to a high pressure source of the liquid and to deliver the liquid at an elevated pressure to a dispenser, said manifold further having a low pressure passageway for exhausting pressurized liquid from said high pressure passageway and a blind bore extending between said high pressure passageway and said low pressure passageway, a pressure relief valve received in said blind bore so as to be removably coupled between said high pressure passageway and said low pressure passageway, said pressure relief valve including a valve stem and a valve seat, said valve stem mounted for movement relative to and for contact with said valve seat to selectively allow liquid flow from said high pressure passageway to said low pressure passageway, one side of said valve seat defining a high pressure side in communication with said high pressure passageway so as to be constantly flushed by the liquid flowing through said high pressure passageway between the high pressure source of the liquid and the dispenser, and another side of said valve seat defining a low pressure side in communication with said low pressure passageway, a valve actuating mechanism coupled to said valve stem, and a dynamic seal engaging said valve stem on said low pressure side and preventing leakage of the liquid from said low pressure side to said valve actuating mechanism.