The product is made by adopting a technology of combining internal digester and external protector. In this way, it not only minimizes the possibility of doing damage to the internal digester, prolong its life span, and also create a complete oxygen-free room for anaerobic microorganism to do fermentation, which in return increases the biogas output ratio.
It can bear 8000---15000kpa and be used for 15 years continuously. During the test, we fill the digester with air up to 5000kpa\8000kpa\10000kpa\15000kpa etc. For 8 hours, for its air-tightness, pressure bearing capacity, etc.
To set users' mind at ease, we have it insured against its quality, which means you can get payment of 1000RMB from the insurance company, if any damage irreparable caused to the biogas digester within 5years. We have developed more than 20000 end users and our products are highly of by all the users and the staff from local agricultural bureau unanimously.