Butterfly valve with servo-motor

Details Butterfly valve with servo-motor Butterfly valve with servo-motor

1984-09-06

1985-12-03

Jones, Larry

Valves and valve actuation

Fluid actuated or retarded

With mechanical movement between actuator and valve

251279, 251305, 251308, F16K 3112

Patent

active

045561923

ABSTRACT:
Butterfly valve actuated by a servo-motor, opening taking place by means of hydraulic force and closing by means of spring force. The hydraulic force must overcome the torque due to the flow, and the force of the closing spring. The excess hydraulic force of the servo-motor (2) during the end phase of the opening procedure is stored (3) and released during the closing procedure, whereby the closing time (t) can be minimized.

REFERENCES:
patent: 4054156 (1977-10-01), Benson
patent: 4158367 (1979-06-01), Mailliet
patent: 4261546 (1981-04-01), Cory et al.

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