Muffler (1) acoustic performance A. Muffler frequency bandwidth: impedance composite muffler is not less than 4-5 octaves; resistance, resonant, muffler hole injection corresponds to the fundamental frequency and low-kai wave of not less than two octaves; other versions muffler not less than three octaves. B. Muffler A weight value indicates the insertion loss, the specifications of the muffler, the muffler denote overall length of the muffler unit or static or dynamic octave insertion loss. (2) the aerodynamic performance (total pressure loss coefficient "ξ"): The impedance compound muffler machine "ξ" is not greater than 1.4; (2) muffler in ensuring the performance conditions, muffler, through flow range of system design 90 to 110% of the traffic. (3) muffler guarantee performance under conditions of medium pressure by a maximum of 120% of the system design pressure, muffler price, the highest temperature of the medium by shall be no higher than 200 ℃. Fan muffler (Fan silencer), production muffler, exhaust pipes and mufflers and muffler drum Fan identical form, uses the principle of resistance acoustic noise, the high bandwidth features include better effect for low, intermediate frequency has a positive effect and pulsation characteristics when muffler sound reduction principle and micro-perforated muffler and impedance composite muffler. Muffler price, Dingrui air conditioning (certification), the muffler by wucheng Dingrui Air Conditioning Equipment Co., Ltd. Wucheng Dingrui Air Conditioning Equipment Co., Ltd. (www.wcdrkt.com) (www.wcdrkt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness , the maximum meet customer needs. In Dingrui air conditioning leadership with the staff warmly welcome all inquiries negotiations to create Dingrui air conditioning better future.