F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 31/40 (2006.01) F16K 31/42 (2006.01) F16K 39/02 (2006.01)
Patent
CA 2163312
The valve comprises a first pressure chamber (2), an outlet chamber (6) and a valve body (8), cooperating with a first valve seat (12), and also a second pressure chamber (13) delimited by the valve body. The valve body (8) comprises a control piston (22) which cooperates with a second valve seat (26) and is movable between a closing position and an open position. The control piston delimits in a valve chamber (17) a first sub-chamber, which faces away from the second valve seat (26) and communicates with the first pressure chamber (2), a second sub-chamber, which faces the second valve seat (26) and communicates with the outlet chamber (6), and a middle sub-chamber, which surrounds the cylindrical surface of the control piston and communicates with the second pressure chamber (13). The control piston (22) establishes in the closing position transfer communication between the first and the middle sub- chamber, and in the open position transfer communication between the second and the middle sub-chamber. The valve body (8), which is designed as an equalizing piston, adjusts itself always like a follower piston with respect to the control piston (22) which may be driven by a controllable positioner (19), and is controllably displaceable thereby between the first valve seat (12) and the various open positions.
Kalin Rudolf
Thomann Bruno
Tiefenthaler Edelbert
Cci Ag
Gowling Lafleur Henderson Llp
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