Heating oil pump for selective one or two-line operation

Details Heating oil pump for selective one or two-line operation Heating oil pump for selective one or two-line operation

F - Mech Eng,Light,Heat,Weapons

23

K

103/14

F23K 5/00 (2006.01) B67D 7/04 (2010.01) F23K 5/04 (2006.01)

Patent

CA 1278461

Abstract A heating oil pump is designed for selective one or two-line operation. Between the suction side (12) and return side (17), there is a connecting passage (23) which can be closed by a closure member (Z4) during two-line operation. The latter is displaceable from a closed to an open position during insertion of the plug by an actuating element projecting into the insertion path of the plug (27) and back to the closed position by a return spring during removal of the plug. This provides an automatic change-over without the need for the return pressure to be higher than the suction pressure.

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