Tianjin OTS valve manufacturing limited compay ,a jointed company ,we specialized in producing butterfly valve ,check valve ,gate valve ,ball valve and so on more than 10 years .we have the factory of 8600 square meters and 120 staff to together promote the development of company .the size of our valve from dn50-2400 mm ,with different material of seat ,disc,stem,bushing and so on under the pressure is 1.0-1.6 MPa .