Sanco Valves Pvt. Ltd. Supplies Swing Check Valve with Trim Materials. Sanco Valves Pvt. Ltd. Manufactures industrial valves. Swing Check Valve with Trim Materials has the circular male and female bonnet joint which is self-aligning and encapsulates the gasket. Swing Check Valve with Trim Materials is suitable for service in horizontal or vertical [flow up through valve only] piping runs. These valves have low pressure drop and are suitable for moderate velocity applications. Relocating swing check valves within the piping system can often minimize or eliminate problems caused by this type of application. It is available in 300 class.