Fluid handling – Systems – Multi-way valve unit
Patent
1986-03-25
1988-01-12
Nilson, Robert G.
Fluid handling
Systems
Multi-way valve unit
1376254, 137898, F16K 1107
Patent
active
047184566
ABSTRACT:
A valve which conditions steam from a relatively high pressure source, by simultaneously reducing the steam pressure and temperature to the level desired for a particular steam utilizing application. The steam conditioning valve allows the amount of steam flow to be adjusted over a wide range, and simultaneously adjusts the amount of desuperheating liquid in direct proportion to the selected steam flow. Steam flow control is accomplished by passing the steam through an array of orifices in a fixed sleeve mounted in a valve body. A piston is movable within the sleeve to selectably cover or uncover the orifices as desired to regulate the amount of steam flowing therethrough. Steam flowing through the uncovered orifices enters a throat region where the steam accelerates and is subjected to a flow of desuperheating liquid; this liquid flows through a passage concentric with the steam flow control piston, and the amount of liquid flow is controlled by the reciprocal position of the piston assembly. The regulated flow of steam may optionally pass through orifices in one or more concentric steam diffusers to reduce the steam pressure in stages maintaining a subcritical velocity.
REFERENCES:
patent: 704585 (1902-07-01), Schutte
patent: 2254472 (1941-09-01), Dahl
patent: 3331590 (1967-07-01), Battenfeld et al.
patent: 3602261 (1971-08-01), Brown
patent: 3719524 (1973-03-01), Ripley et al.
patent: 4011287 (1977-03-01), Marley
patent: 4108210 (1978-08-01), Luthe et al.
patent: 4249574 (1981-02-01), Schnall et al.
Nilson Robert G.
Steam Systems and Services Incorporated
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