HIGH-TEMPERATURE HIGH-PRESSURE LIQUID FLOW CONTROL VALVE AND METHOD OF PREVENTING FIXING OF ITS STEM

Title:

HIGH-TEMPERATURE HIGH-PRESSURE LIQUID FLOW CONTROL VALVE AND METHOD OF PREVENTING FIXING OF ITS STEM

Document Type and Number:

WIPO Patent Application WO/1999/041533

Kind Code:

A1

Abstract:

A cartridge type flow control valve which can be directly installed on a piping without the need of a valve casing and ensure a sufficient sealing property and prevention of stem fixation, comprising a valve disc (1) cantilever-supported and consisting of a valve plate (11) and a stem (12) integrally formed of ceramics, a truncated cone-shaped plug member (2) of a two-layer structure consisting of a high-strength refractory (21) at the axial front and an insulating refractory (22) at the rear and a driving mechanism (3) for the valve disc (1), wherein the valve has a first sealing member (4) consisting of a heat-resisting fiber and wound around the outer periphery of the plug member (2), a mounting member (23) for fixing the plug member (2) and mounted on the mounting seat (103) of an air supply branch pipe (100), a second sealing member (5) consisting of an O-ring to which the mounting member (23) is mounted, and a third sealing member (6) consisting of a gland packing in a bearing member (27) of the stem (12), the plug member (2) being inserted in an opening (102) provided in a flow path wall. A supply of a heated inactive gas or air to a clearance (7) between the stem (12) and an axial hole (24) in the plug member (2) prevents the fixation of the stem.

Inventors:

KITAGAWA MITSUHIRO
SAITO NORIO
SATO KIMIHIKO

Application Number:

PCT/JP1999/000498

Publication Date:

August 19, 1999

Filing Date:

February 05, 1999

Export Citation:

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Assignee:

NIPPON KOKAN KK (JP)
ASAHI GLASS CO LTD (JP)

International Classes:

F16K27/02; F16K1/22; F16K41/04; G06F9/44; (IPC1-7): F16K1/22

Foreign References:

JPS6346771Y2	1988-12-05
JPS5389621U	1978-07-22
JPH0117729Y2	1989-05-23
JPS61278666A	1986-12-09
JPH0942471A	1997-02-14
JPS5920066U	1984-02-07

Other References: