1. Pressure Self-sealing Parallel Double Wedge Cast Steel Gate Valve adopts parallel double wedge structure. The bonnet adopts pressure self-sealing structure, and the sealing becomes more reliable with higher medium pressure.
2. The valve is designed in accordance with API 600 and ASME B16.34 standards, and used for main and auxiliary process pipelines of power stations under high temperature and high pressure conditions.
3. Materials for valve body, wedge assembly and pressure self-sealing assembly can be selected as required.
4. It is applied for pipeline shut-off of high-pressure media such as high-temperature steam and high-temperature oil products, and not for throttling service.
1. Parallel double wedge with wedge expanding mechanism automatically compensates sealing surface wear for stable sealing performance.
2. Pressure self-sealing bonnet. The gasket is compressed by internal medium pressure to ensure safe and reliable bonnet sealing under high pressure conditions.
3. Hard alloy is hardfaced on wedge and seat, featuring high temperature resistance, wear resistance and medium erosion resistance.
4. Bottom-mounted blowout-proof stem to prevent stem ejection under pressure.
5. Full bore flow passage with low flow resistance and low pipeline pressure loss.
6. Easy bonnet disassembly for convenient inspection and maintenance of internal wedge assembly.