Safety valve mainly have the following several kinds of classification methods:
(1) according to the overall structure and loading structure forms can be divided into heavy hammer lever, spring type and control type 3;
(2) according to the valve opening height and the valve diameter ratio can be divided into weiqi and full-kai-type safety valve 2;
(3) according to the gas emission can be divided into totally enclosed, semi-enclosed and open 3.
Safety valve factory must be shipped with the product quality certificate, and firmly set on the product nameplate. The nameplate shall include the following contents:
(1) manufacturing unit name, manufacturing license number;
(2) type, type, specification;
(3) the product number;
(4) the nominal pressure, mpa;
(5) the seat throat diameter, mm;
(6) the emission coefficient;
(7) inspection mark;
(8) the ex-factory date.
Safety valve for the pressure vessel, the metal plate should also be indicated on the suitable medium, temperature. Discharge coefficient of safety valve, to determine the units manufactured by safety valve test.
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