REMOTE MAINTENANCE TYPE BALL VALVE

Japanese Patent JP3200766

B2

PROBLEM TO BE SOLVED: To facilitate inspection and repair by installing guide pins on a valve main body, installing a bonnet bolt on a bonnet part, rotating the bonnet bolt, and separating the bonnet part from a cartridge part in which a valve ball is housed.
SOLUTION: A ball valve capable of remote maintaining using a manipulator is formed in such a constitution that a valve ball is rotatably housed in a bottomed cylindrical cartridge 2 which is detachably housed in a valve main body 1, the valve ball is rotated through a stem 5 by an actuator so as to open/close a flow passage. In this case, guide pins 6a, 6b are erected on both sides of the valve main body 1, and a hole 61 is formed so as to enter each pin 6a, 6b on a position corresponding to a bonnet 4. A bonnet bolt 7A, a jack bolt 7B are arranged together with stoppers 16A, 16B on both sides of the bonnet 4, and nuts threadedly engaged with the bolts 7A, 7B are incorporated to the valve main body 1.

Noboru Koumi
Takamizawa Yoshikazu
Yasuzo Ueda
Norio Matsui
Yoshihiro Toyota
Jun Yamazaki
Tadayoshi Koizumi
Ohno Katsuo

JP30623797A

August 20, 2001

November 07, 1997

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Oka Valve Manufacturing Co., Ltd.
Nuclear Fuel Cycle Development Organization
Pesco Co., Ltd.

F16K27/06; F16K5/06; (IPC1-7): F16K5/06; F16K27/06

JP56120862A
JP5722477A
JP6049171A

Fumio Suga

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