Heat exchangers manufactured by CYT are specially designed to fit with API682, plan 21, plan 22 and plan 41 as well. They are specifically constructed for the cooling and warming of the operating substances. These heat exchangers are built in accordance to the specifications of GB150-98. Our products have been widely applied to petroleum, chemical fiber, fertilizer, oil refining, papermaking, nuclear power, power plant, metallurgy, food, pharmaceuticals, etc. Main products are mechanical seal, dry gas seal and many kinds of seal control systems, applying to rotating equipments.