Ⅰ、Applicable range
　　 Stainless Steel Draw Drum ZGP3-300X200 The draw drum made of stainless steel possesses the features of high precision multiple functions, high efficiency and automatization. It untilizes advanced technique, such as pneumatic circuit, automatic control, program control. It enables to control heat, temperature and humidity automatically. The operation is simple. To use equipment contributes carry out continuity and automatization of tanning production. The leathers after bating soft are not only eliminated cohere, contraction and hardness of firbe and possessed moderate soft and extend, but also reinstated area of contraction because of dry. Therefore, it can raise strength, reduce extend, and improve exterior observe, the leathers have excellent surface graininess.

Ⅱ 、Fearure of meachanism:
　　This machine consists of inside drum made of stainless steel, outside shell with heat-shielded layer, frame, driving component and automatization control set of water, electric and gas.
　　 1. The major driving adopt gear reducer with brake motor which power is 11kilowatts, the drum body revolve in positive or opposite direction by four V-belts.
　　 2. It is set eight aprons around inside drum, On both ends of drum body, it is composed a closed circuit by wind pipe and heating, absorption dust set, the leathers in the drum run by muitipul function program control according to requirement of process, the machinery acting is mitigatory, the leathers don't undergo hurt. Skin scraps and dust continually remove into store box of scraps through wind path, to sure the quality of finished leathers.
　　 3. Relative humidity of air is adjusted by spray water, automatic adjustment of spray water time through PC timer installed in electric box with circulatory way, sometimes spray and sometimes spray and sometimes stop.
　　 4. There is a gas exchange which can adjust temperature and humidity control automatically when a command of open valve in temperature and humidity control system is sent out, gas flow pass through outside space. It is necessary to when both of temperature and humidity control system is sent out the closed command, the gas flow can flow in drum body.