Control apparatus for pressurized gas/liquid systems

Details Control apparatus for pressurized gas/liquid systems Control apparatus for pressurized gas/liquid systems

G - Physics

05

D

137/117, 137/34

G05D 7/00 (2006.01) B01F 13/04 (2006.01) B05B 7/32 (2006.01) B29B 7/80 (2006.01) B29B 13/02 (2006.01)

Patent

CA 1147236

CONTROL APPARATUS FOR PRESSURIZED GAS/LIQUID SYSTEMS Abstract Control apparatus for purging the pressure in conduits or hoses of pressurized gas/liquid systems such as hot melt foam generating equipment. The control includes a selectively actuable "purge valve" which upon actuation applies an output pressure to reverse the direction of rotation of the motor driv- ing the gas/liquid mixing pump, or alternatively to operate a diverter valve that connects the pump outlet side back to the liquid supply line. Simultaneously, the purge valve cuts off the supply of gas to the mixing pump. The control desirably also includes a selectively actuable "start-up valve" for supplying gas to the gas/liquid mixing pump at higher than normal operating pressure, in order to overcome any internal blockage and prime the pump for starting operation.

346995

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