Electric Utility Catalog

ELECTRIC UTILITY TOOLS 800-972-2647 www.stanleyinfrastructure.com 24 Hydraulic system’s capacity to deliver flow against 2000 psi test Close the load valve to where the pressure gage reads 2000 psi. Record flow rate, back pressure, and oil temperature. Flow rate: _______________ gpm Back pressure: _______________ psi Oil: _______________ ° F System capacity to control temperature test Raise the system temperature to 140° F by adjusting the pressure using the load valve on the flow and pressure tester. If it takes more than 1900 psi to get the system temperature to 140° F, adjust the pressure to stabilize the system temperature at some lower temperature, e.g. 120° F. When the system temperature has remained constant for about 15 minutes, record the flow rate, pressure, back pressure, oil temperature, and air temperature. Flow rate: _______________ gpm Pressure: _______________ psi Back pressure: _______________ psi Air: _______________ ° F Oil: _______________ ° F Calculate the tool load hp cooling capacity for an effective 40 degree temperature difference, air to oil using the following formula. (Pressure – Back pressure) x gpm = hp (horse power) 43 x (Oil temperature – Air Temperature) Example: Flow rate: 5 gpm Pressure: 1500 psi Back pressure: 100 psi Air: 70 ° F Oil: 120 ° F (1500 – 100) x 5 = 3.3 hp at 40 deg F 43 x (120 – 70) temperature difference HYDRAULIC SYSTEM REQUIREMENTS