Operating conditions and materials. Liquids: Chemically neutral, lubricative, clean, non-abrasive Screws: Steel, nitrided. Bearing: Hybrid ball bearing. Seal: Viton (other sealing materials on request). PNP or NAMUR signal. Bi-directional: Optional with sensors for flow direction detection. Specification Series OMP-20 Nominal diameter 20mm Flow rate; Qmax 2700L/H Qrate 1800L/H Qmin 18L/H Pressure max 40Bar Temperature 20 to +200 °C Viscosity 1 to 1x10x10x10x10x10x10 MM2/S Accuracy ± 0.1% of measured value K-factor 321 K [P/l] Frequency 161 f at Qrate Hz Weight Conn DIN 20mm 5 Kg. Weight Conn ANSI 3/4" 6 Kg.