Title:
トラニオン型ボールバルブ並びにバルブのシール構造とバルブ用パッキン
Document Type and Number:
Japanese Patent JP6522746
Kind Code:
B2
Abstract:
A trunnion-type ball valve, a valve seal structure, and a valve packing in which, a seal surface pressure of a tip outer peripheral region is improved. A ball (3) provided inside a body (2) is rotatably provided via upper and lower stems (4 and 5) and is sealed with a ball seat (6). The trunnion-type ball valve has a packing attached between an outer periphery step part provided at a rear part of the ball seat and the body and a pressing mechanism by which the packing is pressed to a ball direction, and is provided with a contact surface to be contacted with a step part surface of the outer periphery step part on a tip outer diameter side of the packing and a space provided between the packing and the step part surface of the outer periphery step part on a tip inner diameter side of the packing.
Inventors:
Kazama Masahiro
Funatsu Masazumi
Funatsu Masazumi
Application Number:
JP2017518009A
Publication Date:
June 05, 2019
Filing Date:
May 13, 2016
Export Citation:
Assignee:
KITZ CORPORATION
International Classes:
F16K5/06; F16J15/18; F16J15/24
Domestic Patent References:
| JP2011122603A | ||||
| JP2002257246A | ||||
| JP55163373A | ||||
| JP46001759Y1 | ||||
| JP39010792B1 | ||||
| JP2077368U | ||||
| JP1140074U | ||||
| JP59052280U |
Foreign References:
| GB1475647A | ||||
| CN103615595A |
Attorney, Agent or Firm:
Tetsuo Kobayashi