FIELD: valve sealing methods.
SUBSTANCE: invention relates to a system for sealing an opening-closing valve or a shut-off valve in the process of oil refining. Some aspects relate to the bellows seal to prevent oil and steam from escaping from the inside of the valve. In some aspects, a stop for limiting the movement of the movable seat relative to the base of the seat.
EFFECT: invention prevents steam loss while providing the required seal to prevent product leakage.
20 cl, 6 dwg
