Valve stem actuator

Details Valve stem actuator Valve stem actuator

1982-09-07

1984-07-17

Walton, George L.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Cleaning or steam sterilizing

74661, 74832, 51241VS, 137331, 251 58, 251229, 2512495, F16K 31122, F16K 3154

Patent

active

044600097

ABSTRACT:
A valve stem actuator for a slurry valve or the like includes a support frame extending from the valve body to a linear operator having a cylinder and piston. Means are provided for connecting the piston rod to the valve stem and means reciprocally mounted on the support frame rotate the valve stem with respect to the valve body independently of the linear movement of the valve stem to dislodge accumulated crust to permit the valve disc to properly seat to prevent fluid flow through the valve. The linear operator is preferably pneumatically or hydraulically actuated and the rotary actuator preferably comprises an air or hydraulically actuated rack engageable with the valve stem. The valve stem actuator is useful for new valves or for retrofit of present slurry valves or the like.

REFERENCES:
patent: 2238814 (1941-04-01), Kneass, Jr.
patent: 2996075 (1961-08-01), Deimer et al.
patent: 3311121 (1967-03-01), Morrell
patent: 3505888 (1970-04-01), Denkowski
patent: 4338961 (1982-07-01), Karpenko
patent: 4346728 (1982-08-01), Sulzer

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