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The characteristics and use conditions of commonly used materials for plate heat exchanger rubber pads_

by:DIGUANG     2021-04-06
The characteristics and use conditions of commonly used materials for plate heat exchanger rubber pads

2020-05-26 14:12
516 plate heat exchanger rubber gasket is used as a sealing element between the heat exchanger plates, which can effectively prevent plate leakage. The quality of the rubber pad will directly affect the working efficiency of the equipment, and the use of different materials of the rubber pad is also different. Let's take a look at the common material characteristics and use conditions of the plate heat exchanger rubber pad. The main material of the rubber pad is rubber, which is greatly affected by temperature and medium. Therefore, it is easily affected by factors such as formula, uniformity of components, and vulcanization setting conditions during the production process. The index to evaluate the corrosion resistance of a material is that the larger the value of 'local corrosion resistance equivalent PREIt is mainly determined by the content of Cr, MO, and Ni. 1) 304 stainless steel: used in organic and inorganic media, the concentration <30% temperature 30% temperature <50 nitric acid temperature <100 carbonic acid, ammonia and alcohols of various concentrations. The material of 304L is basically the same as that of 304, with better weldability and can be used as a welded heat exchanger. 2) 316L natural cooling water, cooling tower water, demineralized water, carbonic acid, acetic acid and caustic soda solutions with a concentration of less than 50%, solvents such as alcohols and acetone, dilute nitric acid (<20%) with a temperature of less than 100 degrees and dilute phosphoric acid (﹤ 30%), but not suitable for sulfuric acid. 316 is basically the same as it. 3) 317 is suitable for more conditions than 316L. 4) AISI904L and SUS890L are cost-effective and better than the above materials. Particularly suitable for general sulfuric acid, phosphoric acid and halides. 5) SMO 254 high-grade stainless steel, which has increased the MO content, is a super stainless steel improved from 316. It has excellent resistance to chlorides and crevice corrosion. Suitable for salt water and mineral acid. 6) SMO654 is a better material than 254 and can be used in cold sea water. 7) RS-2 (0Cr20Ni26Mo3Cu3Si2Nb) stainless steel, which is domestically equivalent to 316, has better stress corrosion resistance and can be used for concentrated sulfuric acid above 80 degrees. (Concentration 90%---98%) Requirements for plate heat exchanger rubber pads: 1. Scientific formula, must have anti-aging, anti-tear, high resilience characteristics (reduce the reaction force caused by elasticity, the plate is not easy Deformation). 2. The size of the sealing contact surface is accurate, and the alarm signal hole is sensitive. 3. Adhesive-free structure, easy to disassemble and assemble. The above is all about the characteristics and use conditions of commonly used materials for plate heat exchanger rubber pads, and interested friends can learn about it. For more information about the price, model, brand, use and maintenance skills of plate heat exchanger gaskets, please visit the official website of Diguang Heat Transfer. Welcome everyone to browse.
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