... It's a best choice for air heat equipment with thermal medium of high temperature steam and heat conduction oil. It's widely used ... paint,foodstuff,PVC,calio printing,pharmacy.The fin tubes of model SZL Series use Φ18×2.038,Φ21×2.044,Φ25 ... With the use of bimetal,the tubes of radiator has the characteristic of low thermal resistance, good heat transmission,high intensity,low resistance,not easy ...