... reliable sealing performance,light weight,excellent corrosion resisitance,long servicelife Gate valve, double flange,Manufacture acc.to BS5163Face to face ... of DI, CS etc.Stem of SS.Rubber seated gate valve is designed and manufactured by our company through introducing ... intensity,light weight and long service life.WORKING PRINCIPLERubber seated gate valve is in wedge type structure.It can achieve ...