Fluid control valve with fastener for ceramic valve plug
AssigneeFisher Controls International LLC
InventorsLoren Lee Bovee, Gary Alan Witt, David J. Westwater
Life of this patent
Estimating the term…
Abstract
A fluid control valve for use in severe erosive fluid conditions which includes a ceramic plug seat. The ceramic plug seat is mounted to a metal valve element using a tapered mechanical bolt. The tapered portion of the mechanical bolt matches a cone-shaped interior surface portion within the ceramic plug to uniformly distribute the mounting forces within the ceramic plug to prevent cracking of the ceramic plug.
Claims4
In a fluid control valve, including a valve plug assembly having a rotatable valve shaft, a hub mounted at one valve shaft end, and a ceramic plug seat mounted to the hub and having a contoured plug seat surface, the improvement comprising:
- a central bolt receiving aperture through the contoured plug seat surface and extending through the ceramic plug seat, said central bolt receiving aperture including a cone-shaped interior surface portion;
- a threaded mounting bolt having a head and an elongated shank extending from the head, said shank including a threaded end portion for threadably engaging the hub and a tapered portion intermediate to the threaded end portion and the head, said tapered portion matching the cone-shaped interior surface portion within said ceramic plug seat to uniformly distribute mounting forces within the ceramic plug seat.
Dependencies are inferred from the claim text.