FIELD: instrument engineering.
SUBSTANCE: group of inventions relates to a valve and to valve seats. Valve seat comprises an annular rigid support element and an annular elastomer sealing element tightly attached from above the rigid support element. Valve seat is characterized by presence of external peripheral surface made with possibility of engagement with valve body, and inner sealing surface, formed by part of elastomer sealing element and made with possibility of engagement with valve shutoff element. Valve seat comprises one or several valve seat positioning elements configured to engage with the valve shutoff valve shaft or rods, and one or more elements of valve seat positioning open part of rigid support element, which is guide surface for shaft or rods of valve shutoff element.
EFFECT: technical result is longer service life, as well as easier replacement of seals.
29 cl, 7 dwg
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