Apparatus and method for replacing existing actuator zone...

Valves and valve actuation – With selective flow regulation – Rotary

Reexamination Certificate

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Details

C251S315100

Reexamination Certificate

active

07367544

ABSTRACT:
An apparatus and method are provided for replacing existing actuator driven zone valves in an HVAC system, and particularly valves of the rubber paddle type having actuators providing less than 90 degrees of rotation, with a ball valve including a skewed seat bearing that blocks flow through the flowpath when a valve member of the ball valve is rotated through an angle of substantially less than 90 degrees from a fully open position of the valve at which a bore in the valve member is substantially fully aligned with the flowpath. The actuator from the existing zone valve being replaced may be used with the provided ball valve apparatus and method.

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patent: 3880191 (1975-04-01), Baumann
patent: 5305986 (1994-04-01), Hunt
patent: 5324008 (1994-06-01), Bonetti
patent: 5937890 (1999-08-01), Marandi
patent: 6039304 (2000-03-01), Carlson et al.
patent: 6073907 (2000-06-01), Schreiner, Jr. et al.
patent: 6629683 (2003-10-01), Wang
patent: 2001/0030309 (2001-10-01), Carlson et al.
patent: 0 503 195 (1992-09-01), None
patent: 0 928 916 (1999-07-01), None

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