Flange connected national standard cast steel gate valves are suitable for cutting or connecting pipeline media in various working conditions such as petroleum, chemical, thermal power plants, etc. with a nominal pressure of PN1.6~25.0MPa and a working temperature of -35~350 ℃.
Its main structural features include:
1. The product has a reasonable structure, reliable sealing, excellent performance, and beautiful appearance.
2. The sealing surface is welded with Co based hard alloy, which has good wear resistance, corrosion resistance, scratch resistance, and long service life.
3. The valve stem has undergone tempering and surface nitriding treatment, providing good corrosion resistance and scratch resistance.
4. The valve is equipped with an inverted sealing structure, ensuring reliable sealing.
5. The material of parts and the dimensions of flanges and butt welding ends can be reasonably selected according to actual working conditions or user requirements to meet various engineering needs.
