Main structural characteristics and operating conditions of vacuum isolation globe valve

by:Lianke Valve     2022-04-09
The vacuum isolation globe valve is designed and manufactured according to the standard of globe valve, and meets the requirements for the supporting use of power station equipment. The vacuum sealing structure packing chamber is designed to isolate the vacuum reliably. The valve stem is quenched and tempered and surface nitrided, which has good corrosion resistance, scratch resistance and wear resistance. The flange gasket is made of composite material, which has a large expansion coefficient and good air tightness, ensuring reliable isolation between the system and the atmosphere. The main structural features of the vacuum isolation globe valve: 1. The main body of the vacuum isolation globe valve adopts a casting and forging structure, with the sealing surface moving in place to achieve zero leakage. 2. The friction coefficient between the sealing surfaces of the vacuum isolation globe valve is small, and the opening and closing are convenient. 3. The vacuum isolation globe valve has a simple and compact structure, easy maintenance and long service life. 4. The valve cover packing chamber of the vacuum isolation globe valve is equipped with a vacuum sealing mechanism, which has the function of self-expansion and compression. Each connection surface is sealed with high-strength expansion materials, which isolates the system from the atmosphere and has good vacuum sealing performance. 5. The valve connection forms of the vacuum isolation globe valve are divided into two types: flange connection and welding connection, and the driving methods are manual and electric. The vacuum isolation globe valve is suitable for the pipeline with working temperature ≤ 425 ℃ and ≤ 550 ℃, and the working medium is water, air and steam, as an opening and closing device. It is especially suitable for condensing and vacuum negative pressure systems of steam turbines in thermal power plants, and plays the role of vacuum sealing and isolation. The vacuum isolation globe valve is suitable for cutting off or connecting the medium in the pipeline with the nominal pressure of PN1.6~10.0MPa and the working temperature of 0~450℃ in the return water condensing system of the thermal power station and the system pipeline which is required to be isolated from the atmosphere in petroleum and chemical industry. . The reverse seal of the vacuum isolation globe valve is made of stainless steel threaded connection sealing seat or austenitic stainless steel body surfacing, and the reverse seal is reliable. Packing replacement and maintenance can be carried out without downtime, which is convenient and quick without affecting system operation.
valve application are all following the most compatible manufacturing regulations.
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