FIELD: machine building.
SUBSTANCE: proposed device comprises valve disc and valve port made to provide for additional sealing in shutting off in the case of clogging. In the latter case, disc stays in direct contact with body section making the part of said valve port. Note here that said port comprises body and cartridge fitted therein to slide. In standard shutting off, valve disc gets in direct contact with main seat on cartridge. However at clogging, cartridge is pushed into body to force valve disc in direct contact with aforesaid additional sealing outside of cartridge.
EFFECT: increased valve capacity, decreased sizes.
26 cl, 5 dwg
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