The vacuum globe valve is improved from the ordinary globe valve, the difference is that the packing seal of the vacuum globe valve is equipped with a vacuum sealing ring, which has the effect of self-expansion and compression. Better gas sealing performance than ordinary globe valve. Suitable for operating temperature ≤425℃ (chromium molybdenum steel NKJ41Y type ≤550℃), the working medium for water, steam or air pipeline, as a opening and closing device; Especially suitable for steam condensing and vacuum negative pressure system in thermal power plant, it plays the role of vacuum isolation and sealing.
Structural characteristics
1. The vacuum sealing structure packing chamber is designed to isolate the system from the atmosphere and has good environmental protection performance.
2. The selection of materials is exquisite, in line with relevant standards at home and abroad, and the overall quality of materials is high.
3. The sealing pair is advanced and reasonable, improving the sealing performance and long service life.
4. The opening and closing parts have small friction, easy opening and closing, convenient maintenance, reliable sealing and excellent performance.
5. The valve stem has good corrosion resistance, abrasion resistance and wear resistance after tempering and surface nitriding treatment.
6. The flange gasket is made of composite material, which has large expansion coefficient, good airtight performance and reliable isolation from the atmosphere
Standards and specifications
Nominal pressure :1.6~16
Shell strength test: 2.4~24
Upper seal test: 1.8~18
Seal test :1.8~18
