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Factors That Determine Quality Of Bar Plate Heat Exchanger!
Brazing temperature is the key to determine product quality bar plate heat exchanger, it is made up of solder fully liquefied and maximum flow of high temperature and low temperature both of minimising risk of clapboard and fin deformation into account. According to the chemical composition of different solder, solder melting temperature is also different, generally should be higher than that of the solid solder wire, but just below the liquidus, usually for 590 ~ 605 ℃, the temperature of solder melting, liquidity and moist in the best state.
Vacuum degree of vacuum brazing furnace is also affect the quality of the products of the main causes of bar plate heat exchanger, it effectively reduce the oxygen partial pressure in the furnace, abolish the oxide film on the surface of the components, and make the components no longer to oxidation under high vacuum. Require vacuum degree of vacuum furnace in 1 x 10 - more than 4 pa, otherwise it is difficult to guarantee the quality of the brazing of bar plate heat exchanger.
At present, the bar plate heat exchanger has formed a complete series on the pressure grade and the variety specification, the product quality and the manufacturing technique have been perfected.
The concrete expression is:
1. No flux vacuum brazing replaced salt bath dip soldering, the adoption of new technology not only greatly reduce the production cost, and avoid the pollution and environmental atmosphere, improve the quality of the product.
2. Through the introduction of technology digestion and absorption, break through the technology of manufacturing high pressure plate heat exchanger, 8.0 MPa success for the development and research of high pressure plate heat exchanger, create conditions for the large petrochemical plant development in our country.