Specifies the characteristics of swing-type check valves (wafer or flanged types) that have a nominal size in the range 40 mm to 600 mm and that are intended for general hydraulic (water, air, gas or petroleum) applications at cold working pressures of u
SANS 1551-2:2007 history
2007SANS 1551-2:2007 Check valves (flanged and wafer types) Part 2: Class series