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",ANSI Class 150-1",ANSI Class 300-1" Flow rate; Qmax 40GPM Qrate 27GPM Qmin 0.027GPM Pressure max 3600Psig Temperature -40 to 400 °F Viscosity 1 to 1x10x10x10x10x10x10 mm2/s Accuracy ± 0.1% of measured value K-factor K1;886 pulses/gal,K2;1,772pulses/gal,K3;3,838pulses/gal. Frequency f1;394 f at Qrated Hz,f2;788 f at Qrate Hz,f3;1,706 f at Qrated Hz Weight NPT 1" 31,8Lb Weight ANSI Class 150-1" 32,6LB Weight ANSI Class 300-1" 35,3Lb