Check valve with low shut off sound

Details Check valve with low shut off sound Check valve with low shut off sound

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 15/14 (2006.01) F16K 15/03 (2006.01) F16K 47/02 (2006.01) F16K 47/10 (2006.01)

Patent

CA 2532109

The present invention relates to the field of check valves and more specifically to check valves with substantially low operational noise or low shut off noise. Provided is changing a direction of a fluid that closes a first and second flap to produce a slit, gap or orifice. Also provided is passing the fluid through the slit that reduces the speed of the fluid. The reduced speed fluid slowly closes a third flap and reduces shut off noise. The closed third flap creates a tight seal to stop any further fluid flow.

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