vacuum valve, vacuum the connection forms of isolation gate valves can be divided into flange and welding. For manual or electric drive mode. This valve is suitable for the working temperature of 425 ° C and 550 ° C or less or less, the working medium is water, steam or air, as the actuator; Particularly applicable to steam condenser and vacuum negative pressure system of coal-fired power plants, and the vacuum isolating and sealing function. It is composed of ordinary manual gate valves. The difference is that the vacuum seal valve in packing seal when equipped with vacuum sealing ring, with the expansion and compaction effect, and has better airtight performance than ordinary gate valves. This valve is suitable for the working temperature of 425 ° C or less ( Chrome molybdenum steel NKZ44Y type 550 ° C or less) , working medium is water, steam or air line, as the actuator; Especially suitable for power plant steam condenser and vacuum negative pressure system, by vacuum isolation seal.

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