FIELD: mining.
SUBSTANCE: back valve contains sealing, rod with closed head designed to be pressed tightly to sealing, one or more grooves on rod, and pressure force creating spring for setting off rod into tightened position. The safety valve contains a plunger in a case which operates under pressure of a working fluid, a flow pipe, functionally connected with the plunger, and a system of chemical reagent supply arranged inside the case and containing at least one back valve. The device of pressure tightness control of fluid medium pipeline contains a case with at least one pass for fluid medium flow, and cartridge installed in the case and equipped with at least one pass for fluid medium flow. The latter can be positioned against at least one pass in the case so as to allow or close communication between the said passes for fluid medium in the case and the cartridge.
EFFECT: upgrades effectiveness and efficiency and reduces costs.
21 cl, 7 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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