Safety Relief Valves made by Duwa are the best solution to your industrial Safety Valve needs. Duwa Safety Relief Valves are available in various sizes, ranging from 2"-48". Duwa Pressure Safety Relief Valves are available to be manufactured with various materials, such as: Cast Iron, Cast Steel, Stainless Steel, and available in different types of Safety Relief Valves. If you need special Safety Valve specifications, please contact us to inquire about your Safety Valve requirements.