JPS63157585U

JPS63157585U -

Info

Publication number: JPS63157585U
Application number: JP4953687U
Authority: JP
Priority date: 1987-03-31
Filing date: 1987-03-31
Publication date: 1988-10-17
Also published as: JPH0432541Y2

Description

[Brief explanation of the drawing]

図は本考案の実施例であつて、第１図はサポー
トフランジ付きバタフライ弁の概略断面図、第２
図は第１図のＹで示した部分であつて、漏洩装置
を備えた要部の拡大断面図、第３図は第２図に対
応する他の実施例における要部の拡大断面図であ
る。 The figures show an embodiment of the present invention, in which Figure 1 is a schematic sectional view of a butterfly valve with a support flange, and Figure 2 is a schematic sectional view of a butterfly valve with a support flange.
The figure is an enlarged sectional view of the main part of the part indicated by Y in Fig. 1, which is equipped with a leakage device, and Fig. 3 is an enlarged sectional view of the main part in another embodiment corresponding to Fig. 2. .

Claims

[Scope of utility model registration request]

In a low-temperature butterfly valve, the main valve shaft is built into a torque tube that seals and communicates between the valve body and the support flange, and is supported by a bearing bush. A gland packing recess with a small diameter portion formed on the lower side, a packing holder having annular cutouts on the outer and inner walls of the packing holder and fitting into the recess, and a sealing holder that is fitted into the recess to separate the recess and the packing. A non-metallic packing with a downward V-shaped or U-shaped spring that is press-fitted into a groove formed between the presser and between the packing presser and the main valve shaft and becomes more self-tightening as the pressure increases and is crimped against the sealing surface, and the large diameter portion. A support flange leak prevention device for a low-temperature butterfly valve, comprising a snap spring that fits into an annular groove carved in an upper wall to prevent the head of the seal holder from coming off, and a ring that supports the seal holder.