 The supplier is responsible for confirming the fan parameters provided by the demander, and selecting the appropriate fan model and motor power according to the parameters provided by the demander to ensure the process requirements.
 Design of fan. Manufacturing. Inspection. Testing in strict accordance with the current national and industry standards.
 After the equipment is manufactured, the quality inspection department of the supplier shall issue a certificate before leaving the factory.

 Fan manufacturer's guaranteed value for fan performance
 The performance curve of the fan, under the condition of the same air volume, the allowable air pressure difference is less than or equal to 5%.
 The deviation of the total pressure value under the above given flow rate is 0.25, and the corresponding flow deviation under the above given total pressure is ≤ 5%.
 Fan casing and impeller are cut by numerical control.
 Impeller material, spindle material and gas contact part of the material are made in accordance with technical requirements.
 The fan casing has good rigidity, no vibration phenomenon, the fan impeller runs smoothly, the body vibration is within the specified range (according to the fan industry standard), and the connection parts of the body are well sealed to ensure no air leakage.
 The bearing is lubricated with mechanical lubricating oil. The manufacturer will design a reasonable and reliable bearing lubrication structure according to the requirements of long-term work to ensure that the bearing temperature rise is not greater than 40 ℃, the maximum surface temperature is not greater than 65 ℃, and the bearing has a temperature monitoring device.
 Fan and motor adopt integral base structure
 The supplier shall provide various documents related to quality assurance, including:
 Product inspection certificate;
 Material inspection certificate of main parts;
 Material test report of main parts;

 In the process of product installation, debugging or operation, due to the damage of parts caused by the quality of our company's equipment, our company will unconditionally replace the parts with the fastest speed. If the parts are damaged due to improper use by the demander or other non-equipment quality reasons, our company guarantees to provide them to the demander in a timely manner according to the material cost price.
 Our company guarantees to provide spare parts to the buyer for a long time at preferential prices.
 The warranty period of the sold products is 12 months. If there is any manufacturing quality problem within 12 months, our company is responsible for the warranty, replacement and satisfaction.
 Our company has established a regular return visit system for users. In the first half of each year and the second half of each year, we will pay a return visit to understand the user's equipment usage and listen carefully to the user's opinions to improve the performance and quality of the fan.
 All transmission boxes shall be equipped with 10L 46# mechanical lubricating oil before leaving the factory.
 Zibo Xinhua Fan Co., Ltd. provides long-term high-quality service for the sold equipment, in which the after-sales technical service is free for life, and the warranty period for the sold products is one year.