Description: required NPSH to give the operating performance; Name: Net positive suction head (req)
Description: minimum NPSH-value at the pump inlet connection required to give the rated or operating performance at the specified conditions; Name: Net positive suction head required
Description: norm describing the material. The material number is taken from this norm. Type and number of the norm with issue year and issue month must be given; Name: Reference norm material of the valve ball/valve cone