公开(公告)号：US3692276A

公开(公告)日：1972-09-19

申请号：US3692276D

申请日：1971-05-27

Applicant: JENKINS BROS

Inventor： CONNERS JOHN A ,  LIEPELT DONALD W ,  BAULIEU WILLIAM H

IPC: F16K1/226 ,  F16K1/22

CPC classification number: F16K1/2265

Abstract: Butterfly valve assembly for installation in a pipe line between flanges. Assembly includes rigid tubular valve body and resilient valve seat insert to make tight seal with flanges when installed and to make tight seal with valve disc in service. Seat insert has certain dimensions undersize relative to valve body so that insert may be stretched when fitted to body and is further stretched when flanges are tightened during installation. Stretching assures secure fit between insert and body before installation and leak proof seal after installation. Seat insert and valve body have cooperating radial ledges asymmetrically located to prevent relative movement when valve disc is closed.