® Low Noise, Low Pulsation Gear Pump Elika Series 1, 2, 3, 4 and Multiple Seals “N” Standard version on NBR the temperature of the fluid should between -10°c and +80°c. “V” Fluorocarbon version suitable for fluid at hi-temperatures. Range between 10° c and +120° c. In the range between 10°C and +80°C pressures P1, P2 and P3 are possible as per product table; beside that P1 should not be exceeded. Frequently used Formulas Fluid velocity Calculate the velocity [v] of a fluid in a pipe as follows: v = Q / 6 x A [m/s] Q = flow rate [litre/min] 2 A = inside area of pipe [cm ] Delivered flow rate Calculate flow rate [Q] as follows: -3 Q = V x n x h x 10 [litre/min] vol 3 V = displacement [cm /rotation] n = rotation speed [rpm] h = pump volumetric efficiency (take 0.97 as an indicative value for rotation speeds ranging between 1000 and 2000 rpm) vol Absorbed torque Calculate necessary torque [M] of a pump subject to a pressure differential between inlet and delivery as follows: M = (V x DP) / (62.8 x h )· [Nm] hm 3 V = displacement [cm /rotation] DP = pressure differential [bar] h = hydromechanical efficiency (take 0.80 as indicative value under cold conditions hm and 0.85 under working conditions) Absorbed power Calculate hydraulic power [P] transferred to fluid from a pump subject to pressure differential between inlet and delivery as follows: P = (Q x DP) / (600 x h )· [kW] tot Q = flow rate [litre/min] DP = pressure differential [bar] h = total pump efficiency ( h x h ) tot hm vol Values for h and h (and consequently h ) depend on pressure differential between vol hm tot inlet and delivery, rotation speed, fluid features (temperature and viscosity) and filtering degree. Contact jbj Techniques technical office telephone: 01737 767493 or email: info@jbj.co.uk for further details on efficiency. The proper values for flow rate, torque and power absorbed according to pressure differential, rotation speed and set test conditions, can be found on the pages dedicated to the performance curves. ELI2 30 40 50 60 70 80 90 0 10 20 0 1000 2000 3000 4000 5000 [ rpm] Flow [l/min] 35.0 28.0 17.8 25.7 23.7 21.0 14.0 11.4 9.6 8.2 7.0 Flow ELI2 pumps 7 www.jbj.co.uk/ELIKA_gearpumps.html #DriveLineHarmony
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