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 1/2",ANSI Class 150-1/2",ANSI Class 300-1/2" Flow rate; Qmax 4GPM Qrate 2,7GPM 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;4,603 pulses/gal,K2;9,206pulses/gal,K3;27, 618pulses/gal. Frequency f1;205 f at Qrated Hz,f2;409 f at Qrate Hz,f3;1,227 f at Qrated Hz Weight NPT 1/2" 9,9Lb Weight ANSI Class 150-1/2" 10,8LB Weight ANSI Class 300-1/2" 12,1Lb