Sealed bonnet for actuating a quarter turn valve assembly

A bonnet for operating a quarter turn valve assembly, which assembly includes a valve housing formed to include a fluid-conducting passage therein, and a quarter turn valve movable in the passage to regulate flow of fluid through the passage, the bonnet comprising

• means for moving the quarter turn valve in the passage between a passage-opening position and a passage-closing position,
• an actuator housing spaced apart from the valve housing and containing the moving means, the moving means including an elongated linkage assembly extending out of the actuator housing and into the spaced-apart valve housing to connect to the quarter turn valve,
• an adapter block interposed between the valve housing and the actuator housing and configured to provide means for connecting the actuator housing to the valve housing, the adapter block including means for supporting the elongated linkage assembly therein to enable movement of the quarter turn valve in the valve housing in response to actuation of the moving means in the actuator housing, and a first and second seal situated therein,
• means for coupling the actuator housing to the valve housing to trap the adapter block therebetween so that the actuator housing, adapter block, and valve housing are held together as a unit, and
• first means containing a portion of the elongated linkage assembly and the first and second seals for defining a first sealed containment area inside the adapter block between the first and second seals to retain and trap therein any fluid that leaks from the valve housing into the adapter block around the elongated linkage assembly, the first means lying wholly within the adapter block.

A bonnet for operating a quarter turn valve assembly, which assembly includes a valve housing formed to include a fluid-conducting passage therein, and a quarter turn valve movable in the passage to regulate flow of fluid through the passage, the bonnet comprising

• a drive shaft extending into the valve housing and coupled to the quarter turn valve,
• an actuator assembly including means for rotating the drive shaft to move the quarter turn valve in the valve housing between a passage-opening position and a passage-closing position,
• an actuator housing containing the actuator assembly, the actuator housing including a first mounting surface formed to include an opening therein,
• an adapter block formed to include a through aperture containing the drive shaft, the adapter block including first means for mateably engaging the first mounting surface on the actuator housing to extend one end of the drive shaft into the actuator housing through the opening formed in the first mounting surface to connect to the actuator assembly and second means for mateably engaging a second mounting surface formed on the valve housing to extend through an opening formed in the second mounting surface to connect to the quarter turn valve, the adapter block including a flat top wall providing the first means and a flat bottom wall providing the second means, the adapter block being formed to include a first opening in the top wall and a second opening in the bottom wall, the drive shaft extending through the first opening to engage the actuator assembly and through the second opening to engage the quarter turn valve, the adapter block further including a first annular seat disposed within the adapter block adjacent to the first opening and a second annular seat disposed within the adapter block adjacent to the second opening;
• means for coupling the actuator housing to the valve housing to trap the adapter block therebetween so that the drive shaft contained in the adapter block is rotatable to actuate the quarter turn valve in the valve housing in response to operation of the actuator assembly in the actuator housing, and
• a sealing apparatus including a first sealing ring on the first annular seat of the adapter block, a second sealing ring on the second annular seat on the adapter block, and means for urging the first and second sealing rings against the adapter block and the drive shaft to establish a sealed connection therebetween to block flow of fluid from the valve housing into the actuator housing through the through aperture formed in the adapter block whereby removal of the actuator housing allows for maintenance of at least the first sealing ring within the adapter block while leaving the valve housing in place.

A bonnet for operating a quarter turn valve assembly, which assembly includes a valve housing formed to include a fluid-conducting passage therein, and a quarter turn valve movable in the passage to regulate flow of fluid through the passage, the bonnet comprising

• a drive shaft extending into the valve housing and coupled to the quarter turn valve,
• an actuator assembly including means for rotating the drive shaft to move the quarter turn valve in the valve housing between a passage-opening position and a passage-closing position,
• an actuator housing containing the actuator assembly, the actuator housing including a first mounting surface formed to include an opening therein,
• an adapter block formed to include a through aperture containing the drive shaft, the adapter block including first means for mateably engaging the first mounting surface on the actuator housing to extend one end of the drive shaft into the actuator housing through the opening formed in the first mounting surface to connect to the actuator assembly and second means for mateably engaging a second mounting surface formed on the valve housing to extend the other end of the drive shaft into the valve housing through an opening formed in the second mounting surface to connect to the quarter turn valve,
• means for coupling the actuator housing to the valve housing to trap the adapter block therebetween so that the drive shaft contained in the adapter block is rotatable to actuate the quarter turn valve in the valve housing in response to operation of the actuator assembly in the actuator housing, and
• first seal means contained wholly within a first recess within the through aperture of the adapter block for establishing a first sealed connection situated within the through aperture between the drive shaft and the adapter block to block flow of any fluid in the valve housing into the through aperture formed in the adapter block without inhibiting rotation of the drive shaft in the through aperture during operation of the actuator assembly whereby removal of the actuator housing allows for maintenance of the first seal means within the recess within the adapter block while leaving the valve housing in place.