Valves and valve actuation – Balanced valves – Reciprocating
Patent
1980-11-20
1982-07-27
Spiegel, H. Jay
Valves and valve actuation
Balanced valves
Reciprocating
251273, 251332, 74552, F16K 3902
Patent
active
043413706
ABSTRACT:
A New Three Stage 15,000 p.s.i. Balanced Valve, controlling fluid flows and pressures equally well in either direction, giving dependable leak proof operation with a very low control force.
The first stage acts to gradually cut off the flow as a metering pin enters the orifice, the second stage seat is a standard 45 degree poppet valve closing directly after the metering pin cuts off the flow, the third stage positive shut off is made by teflon under extreme pressure forming a cut off point between the metering pin and the inside walls of the orifice, just below the 45 degree poppet valve.
This needed high contact pressure is created by a unique pressure multiplier, a system in which the metering pin causes the self lubricated teflon to be telescoped smoothly without obstruction into a slightly smaller confinement while the valve is being fully closed. A coil compression spring is used to restore the teflon back into the low pressure confinement.
This balanced valve has attained a one hundred percent balanced closure member by adding a pressure compensating spindle on the opposite end of the balanced closure member and extending it out through a moving seal to the atmosphere.
REFERENCES:
patent: 1886159 (1932-11-01), Brown
patent: 2160536 (1939-05-01), Buning
patent: 2720219 (1955-10-01), Grove et al.
patent: 3084903 (1963-04-01), Parks
patent: 3188049 (1965-06-01), Zawacki et al.
patent: 3290002 (1966-12-01), Self
patent: 3318577 (1967-05-01), Banks
patent: 3356335 (1967-12-01), Koch et al.
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