Cast STEEL Gate Valve

Installation points

1) Installation location, height, import and export direction must meet the design requirements, the connection should be firm and tight.

2) All kinds of manual valves installed on the insulation pipeline shall not have downward handles.

3) Appearance inspection must be carried out before the valve is installed. The nameplate of the valve should conform to the current national standard "General Valve Mark" GB 12220. For valves with working pressure greater than 1.0 MPa and cutting off effect on main pipe, strength and tightness test should be carried out before installation, and the valves can be used only after they are qualified. In the strength test, the test pressure is 1.5 times of the nominal pressure, and the duration is not less than 5 minutes. The valve shell and packing should be qualified without leakage. The test pressure is 1.1 times of the nominal pressure in the tightness test, and the test pressure should meet the requirements of GB 50243 standard for the duration of the test, with no leakage on the valve sealing surface as the qualification.

4) Handwheel, handle and transmission mechanism are not allowed to be hoisted and collision is strictly prohibited.

5) Gate valves with belt drive mechanism shall be installed according to the specifications of the product.