The vacuum gate valve is improved from the ordinary gate valve, the difference is that the packing seal of the vacuum gate valve is equipped with a vacuum sealing ring, which has the effect of self-expansion and compression. The gas sealing performance is better than that of ordinary gate valve. Suitable for operating temperature ≤425℃ (Chrome-molybdenum steel NKZ41Y 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.
Product 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. Small friction, easy opening and closing, easy maintenance, reliable sealing, 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
Shell material: 1. Carbon steel (type C) 2. Chrome-nickel steel (type P) 3. Chrome-nickel molybdenum steel (type R) 4. Chromium molybdenum vanadium steel (Type I)
Applicable media: 1. Water, steam, oil 2. Nitric acid 3. Acetic acid 4. Water, steam, oil
Applicable temperature: 1.≤425 2.≤200 3.≤200 4. ≤550
Nominal pressure: 1.6~16
