Hot/cold fluid isolation valve

Details Hot/cold fluid isolation valve Hot/cold fluid isolation valve

2007-10-30

2009-12-15

Fox, John (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C137S878000, C122S014300

Reexamination Certificate

active

07631662

ABSTRACT:
A fluid isolation valve having a valve body with a first fluid flow port, a second fluid flow port and a fluid drain port with a valve in the fluid drain port. The valve body also defines a fluid flow channel, a drain flow channel and a valve portion, wherein the valve portion is disposed in the valve body to be communicated with the first fluid flow port, the second fluid flow port and the fluid drain port. At least one flow diversion device is also provided and is disposed within the valve portion. The flow diversion device is configurable between a first configuration and a second configuration, such that when the flow diversion device is in the first configuration the first fluid flow port is communicated with the second fluid flow port. Consequently, when the flow diversion device is in the second configuration the first fluid flow port is communicated with the fluid drain port. The fluid flow can be decreased or stopped by use of the valve within the fluid drain port.

REFERENCES:
patent: 4479459 (1984-10-01), Piper
patent: 5632300 (1997-05-01), Isringhausen

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