API603 Gate Valve API603 gate valve is stainless steel gate valve series products. Using different material, it is suitable for a variety of corrosive and non-corrosive medium, such as nitric acid, acetic acid, water, oil, oxidizing medium. The face to face dimension of API603 standard gate valve is same as API600 standard, and they can be interchanged. But the wall thickness of API603 gate valve is according to ASTM B16.34, is thinner than API600 series gate valve, so that API603 gate valve is cheaper than API600 gate valve. Specification: Size: 1/2~16 Pressure Rating: Class150~600LB Main Materials: CF8, CF8M, CF3, CF3M etc. Design and Manufacture: API603 Face-to-Face:ASME B16.10, DIN3202 Ends Connection: Flange, Butt Welding Inspection & Testing: API 598 Operator: Manual, Worm Gear, Electric, Pneumatic. Feature: Light Weight Compact Structure Easy to Open and Close Low Project Costs