Low Noise, Low Pulsation Gear Motor Installation Notes #DriveLineHarmony 19 Hydraulic fluids Use specific mineral oil based hydraulic fluids having good anti-wear, anti-foaming (rapid de-aeration), antioxidant, anti-corrosion and lubricating proprieties. Fluids should also comply with DIN 51524 and VDMA 24317 standards and get through 11 stage of FZG test ISO 14635- 1. For the standard models, the temperature of the fluid should be between -10°C and +80°C. Fluid kinematic viscosity ranges to be found in the table A15. If fluids other than the above mentioned ones are used, please always indicate type of used fluid and operating conditions so that our technical sales engineering department can weigh possible problems on compatibility or useful life of system parts. Direction of rotation Marzocchi ELIKA series motors are available in either clockwise or counter-clockwise rotation. Direction of rotation of single rotation motors is conventionally defined as follows: when standing before the pump with driving shaft up with is projecting end towards the observer, the pump is rotating clockwise in case of right-hand rotation "D"; therefore, delivery side is on the right, whereas intake side is on the left. The contrary will happen with left-handed motors "S", keeping the same point of view. The ELIKA motors can not be modified in order to reverse the work rotation direction. Seals "N" Standard version on NBR the temperature of the fluid should be 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: v = Q / 6 x A [m/s] Q = flow rate [litre/min] 2 A = inside area of pipe [cm ] Absorbed flow rate: 3 Q=V·n·10 / ηvol [l/min] 3 V = displacement [cm /rotation] n = rotation speed [rpm] ηvol = pump volumetric efficiency (take 0.97 as an indicative value for rotation speeds ranging between 1000 and 2000 rpm) Delivered torque: M = (V · ΔP · ηhm) / 62.8 [Nm] 3 V = displacement [cm /rotation] ΔP = pressure differential [bar] ηhm = hydromechanical efficiency (take 0.80 as indicative value under cold conditions and 0.85 under working conditions) Delivered power P = (Q · ΔP · ηtot) / 600 Q = flow rate [litre/min] ΔP = pressure differential [bar] ηtot = total pump efficiency (ηhm x ηvol) Values for ηvol and ηhm (and consequently ηtot) depend on pressure differential between inlet and delivery, rotation speed, fluid features (temperature and viscosity) and filtering degree. Call jbj Techniques technical office telephone: +44 (0)1737 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. www.jbj.co.uk/gear-motors.html
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