This pump is an in line circulation pump of monobloc design to EN 733 (DIN 24255). The in line design makes it an ideal pump for use in horticulture, fire fighting systems and air conditioning plants. In horticulture the circulation is 24 hours and reliability is of utmost importance. Another key need is low energy consumption. SPX Johnson pump in Indonesia combine the highest reliability and optimal efficiency making it the most suitable pump for heating and cooling systems. The impeller used is a closed impeller with back vanes providing axial balancing of impeller loads. Flow control in these pumps can be made by installing frequency drives. This requires a versatile performance of the pumps and the capacity to operate ate different speeds and at different duty points.