Uses and Features
Vacuum gate valve and vacuum isolation gate valve have two connection forms: flange and welding. There are two types of driving methods: manual and electric. The valve is suitable for the pipeline with the working temperature ≤425℃ and ≤550℃, and the working medium is water, steam or air.
It is improved from the ordinary manual gate valve. The difference is that a vacuum sealing ring is added to the packing seal of the vacuum gate valve, which has the function of self-expansion and compression, and has better air sealing performance than the ordinary gate valve. The valve is suitable for working temperature ≤ 425 ℃ (chrome molybdenum steel NKZ44Y type is ≤ 550 ℃), the working medium is water, steam or air, as an opening and closing device; especially suitable for thermal power plant steam turbine condensation and vacuum negative pressure system , play the role of vacuum isolation and sealing.
Nominal diameter: DN50-DN800
Nominal pressure: 1.6Mpa-10Mpa
Applicable temperature: ≤550℃
Applicable medium: water, steam, air
Body material: cast steel, carbon steel, chrome molybdenum steel
Connection method: flange connection
Design and manufacture: GB12234
Structure length: GB12221
Flange standard: GB9113; JB79
Inspection test: GB/T13927; HG/T9092
|Vacuum gate valve features:
①The packing chamber of vacuum sealing structure is designed to isolate the system from the atmosphere and has good environmental protection performance;
② Material selection, in line with relevant standards, and reliable material quality;
③The matching of sealing pairs is reasonable, which improves the sealing performance and has a long service life;
④The opening and closing parts adopt two-way elastic sealing of parallel gates, with low friction force, easy opening and closing, convenient maintenance, reliable sealing and high performance;
⑤The valve stem is quenched and tempered with nitriding treatment, which has good corrosion resistance, scratch resistance and wear resistance;
⑥ The flange gasket is made of composite material, with large expansion coefficient and good air tightness, ensuring reliable isolation between the system and the atmosphere.