Valve for shutting off a flow

Details Valve for shutting off a flow Valve for shutting off a flow

1986-02-26

1988-09-13

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Rotary electric actuator

74785, 744248VA, 318469, F16K 3104, F16K 3153

Patent

active

047703903

ABSTRACT:
A valve for shutting off a flow having a housing wherein a plug member is movable between "on" and "off" terminal positions by means of a thread; a rotary drive which is switchable off with time delay in the "off" terminal position of the valve; a resilient member for limiting an increase in torque generated by kinetic energy of the rotary drive in the "off" terminal position; and a torque control for the rotary drive includes means defining a range of rotation of the rotary drive in both directions of travel thereof, the entire range of rotation corresponding to a stroke of the plug member and being subdivided into a starting range beginning at one terminal position and ending before a new terminal position is reached as well as into the remaining range; the rotary drive having an available starting torque (break-away torque), taking into consideration the tolerance limit of the power supply in the starting range downwardly, which is at least 10% higher than the largest torque applicable by the rotary drive, taking into consideration the tolerance limit of the power supply in the remaining range upwardly.

REFERENCES:
patent: 3115791 (1963-12-01), Dean
patent: 3616884 (1971-11-01), Balz
patent: 3700085 (1972-10-01), Balz

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