EXTERNAL GEAR PUMPS OPERATING PRINCIPLE — The 1P pumps are fixed displacement external gear pumps with axial clearance compensation. — They give high volumetric flows even with high operating pressures, a low noise level, and they have a high endurance thanks to the balancing system of the loads on the guide bushings. — They are available with displacements going from 1,1 to 8,0 cm 3 /rev and with operating pressures of up to 230 bar. — They are available with clockwise rotation direction and with tapered shaft. — The hydraulic connection is with BSP threaded ports type. PUMP SIZE Displacement range Flow rate and operating pressures Rotation speed Rotation direction clockwise (seen from the shaft side) radial and axial load are not allowed Hydraulic connection Type of mounting Mass 4 hole flange - rectangular type kg HYDRAULIC SYMBOL Ambient temperature range Fluid temperature range Fluid viscosity range Recommended viscosity Degree of fluid contamination 11 110/110 ED

External gear pump with 4 hole rectangular flange and BSP threaded ports Seals: N = NBR seals for mineral oils Nominal size (flow rate in l/min a 1450 rev/min) see table 3 - performances Series No. (from 10 to 19 sizes and mounting dimensions remain unchanged) Clockwise rotation and tapered shaft with key 2 - HYDRAULIC FLUID 2.1 Type of fluid Use mineral oil based hydraulic fluids with anti-foam and antioxidant additives, in conformity with the requisites of the following standards: - FZG test - 11th stage - DIN 51525 - VDMA 24317 For use with other types of fluid (water glycol, phosphate esters...

SERIES 11 4 - CURVES AND CHARACTERISTIC DATA OF GROUP 1P PUMPS (values obtained with mineral oil with viscosity of 36 cSt at 50°C) 4.1 - Flow rate curves Q=f (n) obtained with operating pressure 0 bar PUMP NOMINAL SIZE VOLUMETRIC EFFICIENCY [%] TOTAL EFFICIENCY [%] PUMP NOMINAL SIZE 4.4 - Absorbed power / pressure (at 1500 rpm)

4 holes rectangular flange dimensions in mm Pump code Pump nominal dimension clockwise rotation direction clockwise rotation direction 6 - INSTALLATION – The 1P gear pumps can be installed with the shaft oriented in any position. – Be sure the control rotation direction corresponds to the direction of the arrow marked on the pump before putting the pump into operation. – It is necessary to vent the air from the delivery connection before operating it the first time. – The pump start up, especially at a cold temperature, should occur with the pump unloading. – The suction line must be suitably...