Applied Product Catalog 2017 2018 Page 834 Hydraulic Products

834 Call your local Applied service center to order at 1-866-351-3464 or visit us online at Applied.com Hydraulic Products Oil Temperature: Oil coolers can be selected using entering or leaving oil temperatures. Typical operating temperature ranges are: Hydraulic Oil: 110 F - 130 F, Hydrostatic Drive Oil: 130 F - 180 F, Bearing Lube Oil: 120 F - 160 F, Lube Oil Circuits: 110 F - 130 F Desired Reservoir Temperature Return Line Cooling: Desired temperature is the oil temperature leaving the cooler. This will be the same temperature that will be found in the reservoir. Off-Line Recirculation Cooling Loop: Desired temperature is the oil temperature entering the cooler. In this case, the oil temperature change must be determined so that the actual oil leaving temperature can be found. Calculate the oil temperature change (oil T) with this formula: Oil T = (BTU's/Hr.) / (GPM Oil Flow x 210). To calculate the oil leaving temperature from the cooler, use this formula: Oil Leaving Temp. = Oil Entering Temp. - Oil T. This formula may also be used in any application where the only temperature available is the entering oil temperature. Oil Pressure Drop: Most systems can tolerate a pressure drop through the heat exchanger of 20 to 30 psi. Excessive pressure drop should be avoided. Care should be taken to limit pressure drop to 5 psi or less for case drain applications where high back pressure may damage the pump shaft seals. OIL COOLER SELECTION GUIDE Source: Thermal Transfer Products, An API Heat Transfer Company Conversions: A. HP = (BTU's/hr) / 2545 = (BTU's/min) / 42.4 = KW/0.746, or BTU's/hr = HP x 2545; BTU's/min = HP x 42.4; KW = HP x 0.746 B. GPM = (L/min) / 3.78 or L/min = GPM x 3.78 C. F = (1.8 x C) + 32 or C= (F - 32) / 1.8 D. Mobil Series: Air Velocity SFPM = SCFM/Face Area in Ft 2 , or SCFM = Ft 2 Face Area x Face Velocity SFPM Heat Loads: A. BTU's/hr = (Input Horsepower) x (2545) x (0.25 - 0.5) B. BTU's/hr = (System GPM Capacity) x (System Pressure) x (1.8) x (0.25 - 0.5) C. BTU's/hr = (PSI Pressure Drop) x (GPM Oil Flow) x (1.5) x (% Time) D. BTU's/hr = (Horsepower to Gearbox) x (2545) x (0.5 - 0.5) E. BTU's/hr = (Compressor HP) x (1.1) x (0.85) x (2545) F. BTU's/hr = (MaxTemp.Rise F /hr) x (Gallons of Oil ChangingTemp.) x (3.5) G. BTU's/hr = (GPM Oil Flow) x (Oil T) x (210) Temperature Changes: A. Oil T = (BTU's/hr) / (GPM Oil Flow x 210) B. Water T = (BTU's/hr) / (GPM Water Flow x 500) C. 50/50 Ethylene Glycol T = (BTU's/hr) / (GPM Flow x 432) D. Air T = (BTU's/hr) / (SCFM Air Flow x 432) OIL COOLER QUICK FORMULA SUMMARY Water Cooled: HP curve = HP Heat x 40 x Correction A a (Oil outlet F - Water inlet F) AO Family: Fs = HP Heat x 2545 x Cv (Oil outlet F - Ambient air F) AOC Series: HP curve = HP Heat x 100 (Oil outlet F - Ambient air F) AOL Series: HP curve = HP Heat x 100 (Oil outlet F - Ambient air F) Mobile Series: BTU's/hr curve = HP Heat x 2545 x 100 (Oil outlet F - Ambient air F) Temperature Changes: Source: Thermal Transfer Products, An API Heat Transfer Company

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