Description: lowest thermal flow under which the pump can operate without damage; Name: lowest permissible thermal flow
Description: Lowest flow at which the pump can operate without its operation being impaired by the temperature rise of the pumped liquid ; Name: Minimum allowable thermal flow
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