F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
137/38
F16K 31/126 (2006.01) F16K 31/40 (2006.01)
Patent
CA 1198649
ABSTRACT Upon energization a solenoid (58) activates a pilot valve means (44,46) for opening a pilot flow passage (34) causing flow from a pilot portion (52) of the valving chamber. Flow from the main valving chamber (18) and through a bleeder passage (50) is insufficient to prevent a loss of pressure in the chamber (52) and the pressure in valving chamber (18) urges diaphragm pad (29) upward away from contact with valve seat (26) to permit flow from chamber (16) to outlet (20). A diaphragm insert (30) has a portion (32) with a lip (68) extending into a narrow section (66) of outlet (32) for providing a downstream restriction to maintain sufficient pilot circuit differential to provide valve movement until rim (68) moves out of passage (66) thus providing any desired stroke by adjusting the level of (66) to prevent trapping fine particles of foreign matter at the valve seat.
446443
Corporation Eaton
Macrae & Co.
LandOfFree
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