Operating conditions and materials. Liquids: Chemically neutral, lubricative, clean, non-abrasive, Screws: Steel, nitrided. Bearing: Steel bearing,hybrid ball bearing. Seal: Viton (other sealing materials on request). Signal: PNP or NAMUR. Bi-directional: Optional with sensors for fl ow direction detection Specification; Nominal diameter NPT 1-1/2",ANSI Class 150-1-1/2",ANSI Class 300-1-1/2" Flow rate; Qmax 135GPM Qrate 90GPM Qmin 0.9GPM Pressure max 2300Psig Temperature -40 to 400 °F Viscosity 1 to 1x10x10x10x10x10x10 mm2/s Accuracy ± 0.1% of measured value K-factor K1;269 pulses/gal,K2;538pulses/gal,K3;1,143pulses/gal. Frequency f1;404 f at Qrated Hz,f2;807 f at Qrate Hz,f3;1,715 f at Qrated Hz Weight NPT 1-1/2" 41,2Lb Weight ANSI Class 150-1-1/2" 40,6LB Weight ANSI Class 300-1-1/2" 47,8Lb