Manufacturer: NIHON KOSO CO., LTD.
Model: 3-5483

Features

The new series VSU 3-5403 universal pressure safety relief valves represents the third step in evolution of the first series 3-5401 dated 1989.

• The new series geometry is moulded by demanding experimental tests campaign supported by CFD and FEM analyses.
• Experimental tests, both on compressible (air) and incompressible (water) fluids, with and without back pressure, were performed according to PED requirements (standard ISO 4126-1 and working draft ISO 4126-11).
• With respect to previous series VSU 3-5402, the new series still provides high quality overpressure protection with the same valve on gas, steam, vapour, liquid and two-phase mixtures services and, in addition, offers dramatic improvement of discharge flow rates under back pressure conditions.