FIELD: machine building.
SUBSTANCE: proposed device comprises pad retaining valve seat inside valve body and ring retainer connected with said pad. Said pad comprises outer surface with first outer thread to engage with first threaded hole in valve body. Ring retainer has second outer thread to engage with second threaded hole in valve body. First and second threaded holes make said pad and said ring retainer move in opposite direction given they turn in one direction. Invention covers also another design version of said retainer and valve design with said retainer.
EFFECT: higher reliability.
18 cl, 3 dwg
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