... , wear-resistant EPDM,NBR,PTFE,Viton Handle of valve : iron, punching malleable iron, aluminum handle Normal Diameter of valve: DN40-600 Normal ... mounted whereever needed. 2.Simple, compact structure, quick 90 degree on-off operation. 3.Disc has two-way bearing, perfect seal, without ... 24 months guarantee period. 4.You'll never be low on supply---with our monthly capacity of 6800 sets . 5.We welcome ...