Caliber range:DN80~DN1000；
Pressure range:Class 150~600；
Design standards:GB/T 24925、JB/T 12623；
Structural length:API 609、ISO 5752 GB/T 12221；
Valve cover extension:GB/T 24925、ISO 28921 SHELL SPE 77/200；
Test standard: BS 6364、GB/T 24925 JB/T 12622、ISO 28921-1； 　　
Operating temperature:-196~-50 ℃.

1Due to the targeted design features mentioned above, the reliability of sealing at low temperatures is ensured, which not only meets the requirements of BS 6364, GB/T 24925, and ISO 28921-1 (which is 1/2 of BS6364), but also meets 1/3 of BS 6364, Grade VI of GB/T 4123 is also optional；
　　2The pure metal overlay hard alloy sealing pair ensures long-term cyclic life at low temperatures. The flexible sealing ring design ensures that the sealing pair is subjected to low surface pressure and long-term use. The special structure of the packing sealing design ensures sealing at the packing box, meeting ISO 15848-1 requirements；
　　3. The valve seat sealing ring is designed as a split type, which can be disassembled and replaced, enabling online maintenance and repair, saving maintenance costs and improving efficiency;
　　4The special double bevel and triple eccentric sealing pair design reduces the radial eccentricity, greatly reduces the torque of the actuator, and reduces the torque required for closing, as well as greatly reduces the torque at the moment of opening. Reducing the contact pressure of the sealing pair not only lowers costs but also extends its service life；
5 、Welded butterfly valve design with maintenance installation port design ensures the replacement of on-site sealing pairs；
6、The flange type adopts API 609 standard flange distance, ensuring that the alternative welding type with other manufacturers adopts GB/T 12221 flange distance, ensuring that welding with the pipeline does not affect the interior；
7、In addition to using different austenitic stainless steels for the valve body, the valve stem materials include XM-19 Multiple materials such as Gr660 Type 2 and Inconel 718 are available, and the special structure ensures the material's low-temperature adaptability.

Widely used in industrial control systems such as chlor alkali, petrochemical, metallurgical, pharmaceutical, power, and fertilizer industries, for controlling strongly corrosive gases, liquids, and other media such as acids and alkalis.

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