Non-return valve

Details Non-return valve Non-return valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 15/04 (2006.01) F02B 19/10 (2006.01)

Patent

CA 2151840

A non-return valve employed in a pre-combustion chamber for a gas fuelled internal combustion engine is described. The non-return valve comprises a body having an inlet passage, and an outlet passage which is in fluid communication with the inlet passage via an intermediate passage of reduced diameter. A valve ball is provided within the outlet passage and is movable between a first position in which it closes the outlet passage, and a second position in which the outlet passage is open to allow the flow of fluid through the valve. An annular valve seat on the outlet side of the intermediate passage is provided, against which the valve ball rests in the first position. The outlet passage is provided with a cover member having several apertures to allow the flow of gas through the outlet passage. A cover member is screwed into the body and has the dual function of retaining the valve ball within the outlet passage and of quenching the back flow of high temperature fluids back into the outlet passage. The internal diameter of the intermediate passage is selected to obtain a predetermined flow rate of gaseous fuel through the non-return valve to achieve the desired gas to air ratio in the pre-combustion chamber.

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