真空闸阀由普通手动闸阀改进而来，区别在于真空闸阀的填料密封处多加装一个真空密封环，具有自胀压紧作用。比普通闸阀的气密封性能更好。适用于火电厂汽机冷凝和真空负压系统，起真空隔离密封作用。
Design Specification
Design& Manufacture： API 602ASME B16.34 MSS SP-117
Face-to Face Dimension： ASME B16.10
End Connection： ASME B16.25
Pressure-Temperature Ratings： ASMEB16.34H420592
Test& Inspection： API 598
Helium Leak Test：API 602MSS SP-117
Each valve, from casting to assembly, shallbe tested100% in conformance with the requirements of the related standards.Please follow instruction for mounting.
Standard：
Design and manufacture：API602、BS5352、MSS SP-117、ASME B16.34
Face-to-face dimension:
Screwed and socket weld ends, consult HANK
Flanged and butt weld ends ASME B16.10
End connection:
Socket welded ASME B16.11；
Butt welded ASME B16.25；
Screwed end ASME B1.20.1；
Flanged end ASME B16.5Construction: BB.OS＆Y / WB.OS＆Y
Material：ANSI/ASME
Test and inspection：API598、API602
Application：
The valves is designed for aggressive applications, especially in transmissionof hazardous substances, including flammable, explosive and toxic line mediumeither liquid, steam, gas, dust, powder, granule or oil. The valve is widelyused in industries, including chemical, petrochemical, oil, LNG, refining,mining, power, textile, food & beverage, pulp & paper, water &waste water, pharmaceutical and HVAC, etc.
Gate valve is for shutoff purpose, it can’tbe used for regulating.
Feature：
1.Compact design. The size of our gatevalve is 28%~45.4% shorter than valves of similar diameter.
2.Zero leakage. All valves are Helium leak tested 100%.
3.Multi-ply bellows, enclosure type, provide maximum service life.
4.Wedged-shape with double sealings. In case sealing is failed on one side, thesealing on the other side shall function just well.
5.Gland packing is provided for excessive guarantee.
6.Straight-through channel design. The valve is low torque, low flowresistance, high flux rate and is energy saving.
