1. Handwheels, handles and transmission mechanisms are not allowed to be used for lifting, and collisions are strictly prohibited.2. The double gate valve should be installed vertically (that is, the valve stem is in the vertical position and the handwheel is on the top).3. The gate valve with bypas

1. The installation position, height and direction of import and export must meet the design requirements, and the connection should be firm and tight.2. The handles of all kinds of manual valves installed on the thermal insulation pipeline must not be downward.3. The valve must be visually inspecte

Gate valve is a widely used valve. Generally, cut-off devices with a diameter of ≥50mm are selected for use, and sometimes gate valves are also used for cut-off devices with a small diameter.一, Advantages of Gate Valve:1. Low fluid resistance2. Less external force required for opening and closing3.

Light weightThe body is made of high-grade nodular cast iron, the weight is about 20%~30% lighter than the traditional gate valve, and the installation and maintenance are convenient.Flat bottom brake seatTraditional gate valves often silt in the bottom groove of the valve due to foreign objects suc

1. The purpose, operating conditions and operating control methods, valve specifications and categories of the selected valve should meet the requirements of the pipeline design document, and the working pressure should be greater than or equal to the working pressure of the pipeline. 2. The n