Metal Valves suppliers Description This type of double flange butterfly valve is widely used in the various pipelines of water supply and drainage, sewage disposal and irrigation to cut off medium flow in the pipe system through an open and close of 1/4 turn of the disc quickly. The design of the double flange butterfly valves, however, has the function of adjusting. Advantages: 1, The inner wall of the double flange butterfly valve is smooth to reduce the fluid resistance and the length of short structure is able to save installation space. 2, Vulcanized EPDM or NBR rubber seat can be effective to avoid leakage in the process of installation of wafer butterfly valves. 3, Pressure test to every single double flange butterfly valve can ensure 100% butterfly valves without leakage after sales and all the butterfly valves are granted 3 years鈥?warranty. Components锛?/strong No.PartMaterial 1BodyDuctile iron 2DiscDuctile iron with nickel plated/Stainless steel SS304 3StemStainless steel/Carbon steel 4SeatEPDM/NBR 5O-ringNBR Dimensions锛?/strong DNLDD1D3D4H1H2H3bn-d 5010816512590708011032194-19 6511218514590708013132194-19 8011420016090709513432198-19 100127220180907011315032198-19 125140250210907011417032198-19 150140285240907013918032198-23 200152340295125102175210452012-23 250165405355125102203245452212-28 3001784604101251022422764524.512-28 3501905204701501252503284524.516-28 4002165805251751402773765124.516-31 4502226155651751402954075125.520-28 5002296706201751403304486426.520-28 600267780725210165420518703020-31 7002928958403002544505606632.524-31 8003181015950300254501620663524-34Metal Valves suppliers website:http://www.ruimaivalves.com/metal-valves/