Stainless steel needle valve Installation notes

Stainless steel needle valve Installation notes:
1, the installation position, altitude, direction and export must meet the design requirements, pay attention to the direction of media flow valve should be consistent with the direction of the arrow mark, the connection should be firmly tight.
2, must be visually checked before the Check valve is installed, the valve plate should be consistent with existing national standards.
3, for the working pressure greater than 32.0 MPa and the role played off valves on the main pipe, the installation should be carried out before the strength and rigorous performance tests, passing behind the prospective use.
4, the strength test, the test pressure for the nominal pressure of 1.5 times the duration of not less than 5min, the valve housing, packing should be no leakage in compliance.
5, when the tightness test, the test pressure of 1.1 times the nominal pressure; test duration in line with national standards.