DOUBLE SEAL VALVE STRUCTURE

WIPO Patent Application WO/2010/081324

A1

A double seal valve structure includes a valve rod (2) and a valve cover (3), a seal padding (4) acting as the first seal structure is provided between the valve rod (2) and the valve cover (3), the lower end of the first seal structure is provided with a second seal structure, the second seal structure is a self-compression type hard seal structure between the metal seal surface of a seal seat (21) provided on the valve rod (2) and the metal seal surface of the inner wall of the valve cover (3); a seal ring (6) sleeved on the valve rod (2) acting as the additional seal structure is provided between the two seal surfaces of the second seal structure, the bottom portion of the seal ring (6) is arranged on the seal seat (21) of the valve rod (2), and a gap is formed between the seal ring (6) and the valve rod (2) to facilitate movement of the seal ring (6) on the seal seat (21).

JP3863563	Valve device
WO/2023/094331	CONTROL VALVE UNIT HAVING A TOOTH STRUCTURE MEASURING DEVICE

YANG JIYUE (CN)
HUANG HONGBIN (CN)
YANG WEI (CN)

PCT/CN2009/073432

July 22, 2010

August 21, 2009

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GUANGDONG LIANSU TECH IND CO (CN)
YANG JIYUE (CN)
HUANG HONGBIN (CN)
YANG WEI (CN)

F16K41/02; F16K3/02; F16K41/00

CN2493808Y	2002-05-29
CN101451625A	2009-06-10
CN101451626A	2009-06-10
CN2145292Y	1993-11-03
CN2709727Y	2005-07-13
CN2063593U	1990-10-10
CN2207487Y	1995-09-13
CN2207488Y	1995-09-13
CN2336155Y	1999-09-01
US5435520A	1995-07-25

YOGO PATENT & TRADE MARK AGENCY LIMITED COMPANY (Block B Sinopec Tower,Tiyuxi Road, Tianhe Distric, Guangzhou City Guangdong 0, CN)

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