Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1979-10-29
1981-12-08
Schwadron, Martin P.
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
251104, 251109, 251286, 251 65, F16K 3700, F16K 3108
Patent
active
043042562
ABSTRACT:
A torque transmitting assembly for effecting rotation of a valve member such as a butterfly valve is hermetically sealed to the valve housing. It includes a rotor member having a plurality of circumferentially spaced permanent magnets of opposite polarity and a driver magnet assembly having a like plurality of circumferentially spaced permanent magnets of opposite polarity facing the magnets mounted to the rotor. The two sets of magnets are separated by a stainless steel separator which hermetically seals the rotor. The driver magnet assembly is rotatable about the separator so that magnetic coupling forces effect a following rotation of the rotor and hence of the valve member. A magnetic indicator may be used to identify the rotational position of the rotor. The entire assembly is hermetically sealed and no packing is required. The assembly is especially useful to control a valve in a hazardous environment wherein no leakage of the fluid being controlled by the valve member is permissible.
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Nova Scotia Research Foundation Corporation
Schwadron Martin P.
Walton George L.
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