The newest size expands the IX Series to a maximum capacity of 40 GPH (150 l/h) and a pressure rating up to 150 PSI (10 bar). A turndown ratio of 750:1 enables only two models to satisfy most chemical metering applications. The advanced head design and fixed stroke length maintain a high compression ratio throughout each stroke, resulting in fast priming and no gas-lock conditions. Precise motor control coupled with an efficient check valve design creates accurate performance of +/-1% over the entire output range. Average power consumption is only 62 watts! Helical gears and return springs reduce power consumption by up to 70% compared to conventional motor-driven mechanical metering pumps. The IX drive requires no oil bath or additional lubrication. In fact, the drive is maintenance free over the life of the pump.