Patent ID: 11859725
Assignee: EDWARDS LIMITED
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  C | IPC C  F

Claim 13:
14. A gas isolation valve comprising:
a housing comprising an inlet, a first outlet and a second outlet;
a valve member located within the housing and being moveable between first and second positions for controlling, in use, the flow of a fluid through the valve;
wherein the valve member is rotatable between said first and second positions such that a bore aligns with the inlet and the first outlet in the first position and the bore aligns with the inlet and the second outlet in the second position;
at least three spaced-apart valve seats in which the valve member is seated so as to form a cavity bounded by the valve seats, an exterior surface of the valve member and an interior surface of the housing;
a first conduit extending between the exterior of the housing and the cavity; and
a second conduit extending between the cavity and the bore of the valve member, such that, in use, a purge gas can be introduced through the first conduit into the cavity and then through the second conduit into the bore.