Valve design to reduce cavitation and noise

Details Valve design to reduce cavitation and noise Valve design to reduce cavitation and noise

1988-01-14

1989-08-29

Rosenthal, Arnold

Valves and valve actuation

With material guide or restrictor

Baffle or zigzag flow restrictor

1376253, 13762537, F16K 4714

Patent

active

048609935

ABSTRACT:
A valve comprising a valve body (10) having inlet (14 ) and outlet (18) passages communicating with a valve chamber (15). A valve element (90) is movable through the valve chamber adjacent a valve seat (92) and a flow deflector ring (104) having a central opening which has discontinuous deflector surfaces (106) around a central opening separated by spaced grooves (108) arranger to disrupt flow a stream of fluid flowing between the valve element and the valve seat to prevent the formation of a vena contracta downstream from the valve seat. A plurality of sleeves (34,36) having cylindrical walls divide the valve chamber to form an entrance section (15a) and an outlet section (15b). An array of inlet bores (38) is formed in an outer sleeve (34) and an array of exit bores (40) is formed in an inner sleeve (36), each of the bores having an a receiving end and a discharge end, receiving ends of bores in the array of outlet bores being spaced axially of the valve chamber relative to discharge ends of bores in the array of inlet bores. Bores in the array of inlet bores are inclined relative to bores of the array of exit bores to form a tortuous flow path from the inlet section through a plurality of axially spaced plenums (44,46,48) to the outlet section (15b) of the valve chamber (15) to minimize noise and cavitation as pressure is reduced in the valve chamber.

REFERENCES:
patent: 3954124 (1976-05-01), Self
patent: 4327757 (1982-05-01), Weevers
patent: 4384592 (1983-05-01), Ng
patent: 4540022 (1985-09-01), Cove
patent: 4679592 (1987-07-01), Lamb
Borg Warner-"Borg-Warner Fluid Controls".
Hydril Production Technology Division-"VCI Modular Choke System"-1983.

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