... , pipe damper, seal, gate valve,check valve, foot valve, filters, valves, pressure balance valve, valve, butterfly valve, pipe expansion ... systems, use of units such as power plants, water plants, mills, water companies, engineering and high construction,Common type used to ... customer made could reach to -30--250Mediaair ,compressed air,water,sea water,oil,acid,alkali etc.Main Data: DNLengthL(mm)Outer ...