F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
137/39.1
F16K 31/02 (2006.01) F16K 31/42 (2006.01)
Patent
CA 1227988
ABSTRACT OF THE DISCLOSURE The solenoid valve (2) actuates a pilot closure (7) which cooperates with a stationary seat surface (22). The pilot closure (7) actuates a main valve head (36) of an on- off valve having a piston (28) with a calibrated leakage (30). The cylinder chamber on one side of the piston (28) communicates with the inflow side of the on-off valve by way of the valve opening controlled by the pilot closure (7), and the cylinder chamber on the other side of the piston (28) communicates directly with a discharge (52). That side of the piston (28) which is near the main valve head (36) is isolated from the flow path (44, 40, 42, 46) of the on-off valve. Consequently, the possibility of leakage is reduced considerably, for a very reduced constructional outlay, electricity consumption is low and the loss of valve-time cross-section associated with an opening instruction is very reduced.
425359
Gowling Lafleur Henderson Llp
Sulzer Brothers Limited
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