What is an air preheater?
      Air preheater(APH)is the shell and tube type heat exchangers used for preheating the air which is fed to the boiler or furnaces/ kilns for combustion of fuels. Air preheater's primary objective is to extract the waste heat from the flue gases leaving the boiler. There are two types of air preheaters for use in steam generators in thermal power stations: One is a tubular type built into the boiler flue gas ducting, and the other is a regenerative air preheater.These may be arranged so the gas flows horizontally or vertically across the axis of rotation.
     The tubular air preheater is equipped with an intermediate tube plate in the tube box. The flue gas passes through the preheater up and down along the steel pipe, and the air passes through the preheater laterally to complete heat conduction.
      Shandong Yiming is a professional manufacturer specializing in the development, design and manufacture of high-efficiency heat transfer elements and supporting equipment for electric power, petrochemical, textile, printing and dyeing industries.
Advantages of enamel tube air preheater:
The electrostatic enamel tube air preheater of our company has effectively solved the above problems. It saves resources and improves economic benefits. Its advantages are as follows:
1, super corrosion resistance, the same coal quality can prolong the service life by more than 3 times.
2,smooth surface, not easy to accumulate dust, reduce blockage and enhance heat exchange effect.
3,it can reduce the exhaust temperature and improve the operation efficiency.
4,super wear resistance and scouring resistance make it easier to clean.
5,the horizontal layout can be replaced by a single one, saving the material cost; The maintenance time is shortened.
Manufacturing process:
Material→Ingot → Hot/Cold-Rolling→ Heat treatment(Normalizing+ tempering) → Inspection→Cutting→Pipe piercing→welding→Sealing test→Painting→Packaging

Q1:How long is the warranty period?
We provide 12 months warranty for all spare parts(exclude fragile parts).
Q2:How do you control the quality?
1) All YM machines are in strict accordance with the ISO quality and CE system requirements.
2)  All information of our products can be checked in efficient management system.
Q3:What certifications do you have?
All our products are CE and ISO9001 certified. Numerous design and innovation patent for all our current models and spare parts.
Q4:What kind of service do you provide?
Before sales:
Provide productinformations, market research forecasting, product customization,product processing,consultation and other services for your convenience.
After sales:
 1.  Technical training on according to customer requirements;
 2.  We promise replacement under warranty;
 3.  We promise to supply the maintenance spare parts; 
 4.  On time response to mail and phone calls of your  consultation.
Q5:Are you a factory or a trading company?, where are you?
We are a factory in Shandong, China.