[Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - fan] fan noise detection and fan vibration detection: the main basis GB / T 2888-2008 "fan and blower noise measurement method", JB / T 8690 -1998 "Industrial Fan noise limits", JB / T 8689-1998 "fan vibration detection and restrictions", GB 9068-1988 "heating, ventilation and air-conditioning equipment - Determination of sound power - Engineering method", GB / "Determination of sound power levels of noise sources reflecting plane free field sound pressure - Engineering method" T 3767-1996. [Tianjin Jinzhong Ji HVAC purification equipment to recommend the star product - Fan Fan] the main performance parameters of flow, pressure, exhaust fan fire power, efficiency and speed. Another fan, noise and vibration are also fans of the size of the main technical indicators. Air volume flow rate, also known as boiler fans, to the unit of time, said the volume of gas flowing through the fan; pressure, also known as hot air pressure, gas pressure increases mean value is within the fan, there is static pressure, dynamic pressure and total pressure of points; power is the fan input power, namely shaft power. Effective power and fan shaft power ratio referred efficiency. Fan total pressure efficiency up to 90%. Fire exhaust fan, fan Tianjin, Tianjin Jinzhong Ji fan manufacturers provided by Tianjin Jinzhong Ji HVAC purification equipment. Tianjin Jinzhong Ji HVAC purification equipment Limited (www.Jzjnt.com) strong, credible, in Tianjin fans, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the group into the brilliant and you work for a better future!