Hard-sealed gate valves, also known as protective gate valves, are used in heating, civil air defense projects and related pipe networks. The valve body is cast with ductile iron and coated with epoxy resin to prevent rust and corrosion. Since the valve body meets the standards of non-toxic drinking water, it can also be drunk raw. The valve body sealing surface is clad with copper alloy, which has good wear resistance and ductility, so the entire valve has good sealing during use. The valve plate also uses copper alloy cladding technology, which is not easy to jam during opening and closing.

The valve stem is made of 2cr13 or B2 brass, and the fully automatic processing technology ensures the processing accuracy of each valve stem, ensuring that there will be no inflexible switching due to different sizes during use, thereby greatly improving the valve's good opening and closing effect during the service life, reducing daily maintenance and replacement, and greatly reducing the use cost and labor replacement cost for the user unit.

The leakage grade of the hard-sealed gate valve is D. In order to improve the sealing performance of the valve, the valve plate grinding process and the valve plate end face milling process are adopted to ensure its strict coaxial concentricity, so that the valve grade is A or B standard.