Over-ride valve assembly for air operated double diaphragm pumps

Details Over-ride valve assembly for air operated double diaphragm pumps Over-ride valve assembly for air operated double diaphragm pumps

1990-03-13

1991-10-08

Michalsky, Gerald A.

Pumps

Motor driven

Fluid motor

91283, 91307, 91319, 91329, F04B 4306

Patent

active

050550071

ABSTRACT:
An over-ride valve assembly is mounted between the actuator valve and center section of an air operated double diaphragm pump to provide normal communication between the actuator valve and the center section of the pump during normal operation of the pump. The over-ride valve assembly has internal passageways extending through normally closed valves to both ends of a valve spool within the actuator valve. The valves may be manually opened to restart a stalled pump by momentarily diverting pressurized air from the diaphragm and directing the pressurized air to the ends of the valve spool to reactivate the valve spool and start the pump.

REFERENCES:
patent: 4339985 (1982-07-01), Wilden

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