Flange type hard seal butterfly valve has the following characteristics: unique structure, flexible operation, labor-saving, convenient, high pressure, low impact, reliable sealing performance.  With a three-dimensional eccentric design, seat and disc have almost no friction and a tighter seal.  Disc seal is a kind of soft and hard laminated metal plate, has the dual advantages of metal hard seal and elastic seal, and has excellent sealing performance regardless of low temperature and high temperature.  

 
Sealing surface of valve body, made of surfacing stainless steel, cobalt-based hard alloy, wear-resisting sealing surface, long service life.  The characteristics of butterfly valve flange are as follows: there is no sliding friction between butterfly plate and sealing ring, the sealing surface is wear-resistant, the flange manufacturer has long service life, reliable sealing and convenient adjustment.  Novel design structure, small overall size, light weight.  
 
 
Double eccentric disc, fast opening and closing, light operation and labor saving.  How to maintain the stainless steel flange The bolts of the stainless steel flange valve packing gland should be tightened evenly and not crushed to prevent ball movement or leakage.  
 
 

The long-term storage of stainless steel flanges should be checked according to plan.  Surfaces of exposed surfaces should be kept clean at all times, dirt removed and neatly stored in a dry, dry place.  When storage, should always keep the stainless steel flange dry ventilation, keep the cleaner clean, and according to the correct storage method for storage.