Butterfly valve construction

Details Butterfly valve construction Butterfly valve construction

1998-03-23

2000-06-27

Fox, John

Valves and valve actuation

Rotary valves

Butterfly

251214, F16K 122

Patent

active

060796952

ABSTRACT:
A butterfly valve having a valve body with a seat therein and a valve disc carried on a rotatable shaft such that the valve disc can be moved into and away from sealing engagement with the valve body seat is provided with a removable and replaceable seat member forming the valve body seat and a removable and replaceable sealing surface member is mounted on the valve disc which is sealingly engageable with the seat member when the valve disc is moved into sealing engagement with the valve body seat. The valve body seat preferably is sized to be press fit into a recess in the valve body and retained therein without additional fasteners. This butterfly valve can be used in a single, double or triple offset valve and the valve can be attached to a pipe in any conventional manner. The valve seat material and the sealing surface material may be solid metal, a resistant material such as nylon or Teflon.RTM. may have a metal insert or may have a high temperature insert such as graphite.

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Vanessa Series 30,000, "Principle of Operation", 1 page.
Adams, "Rotary Tight Shut-Off Valve Type MAK", Series 316, 1 page.
Vanessa Series 30,000 QTG, "Design and Construction", 1 page.

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