Application examples: pipe crimping machine (pipe connector clamping), cutting machine, material compactor, etc. Custom specs are available; please contact us for more details.

CML's products are widely used in all kinds of manufacturing machinery, metal processing machinery, mobile machinery, hydraulic systems, servo systems, and integrated hydraulic oil and electricity application.
Combining the characteristics of different Hydraulic pumps to achieve low noise creates a friendly working environment; low energy consumption joins environmental protection. Low consumption for cost-saving, etc., Most importantly, it can greatly improve the accuracy and stability of mechanical operation and maximize customer benefits.

Feature

• Internal gear pump with axial and radial gap compensation
• Radial compensation with segments
• Suction and pressure port radial
• Field of application: Industrial hydraulic
• Low noise
• Long time life
• Low pulsation (pressure pulsation ~2 %)
• Multi flow combinations

Application

• Suitable for injection molding machines, molding machines, servo-hydraulic energy saving systems and other high pressure hydraulic machines.

EIPC6 Series

Testing condition：n = 1.450 min-1,Δ p = 250 bar,T = 50 °C,Medium: HLP 46

Rated Size	125	160	200	250
Spec. volume Vth [cm3/rev]***	125.7	160.1	200.9	249.9
Continuous operating pressure [bar]**	250		160	140
Peak operating pressure [bar] max. 10 sec 15 % duty cycle**	280		170	150
Cut-in pressure peak [bar]**	300		180	160
Nominal speed [min-1]****	400 - 2.500	400 - 2.000
Max. speed [min-1]	2.800	2.200
Operating viscosity [mm2/s]	10 - 300
Starting viscosity [mm2/s]	2.000
Operating temperature [°C]	-20 to +100
Operating medium	HL - HLP DIN 51 524
Max. medium temperature [°C]	80
Min. medium temperature [°C]	-20
Max. ambient temperature [°C]	80
Min. ambient temperature [°C]	-20
Max. admission pressure (intake side) [bar]	2 bar absolute
Min. admission pressure (intake side) [bar]	0.8 bar absolute (Start 0.6)
Weight appr. [kg]	27.5	30	43	54
Degree of filtration	Class 20/18/15 due to ISO 4406
Life expectancy	not less than 1x 107 load cycles against peak operating pressure
Efficiency η vol:	94	94	93	93
Efficiency η hm:	90		91
Pump noise* (measured in sound chamber) dB[A]	76	77	77	78

Variable-speed operation

As a matter of principle, Eckerle internal gear pumps are eminently suited for variable speed operation. Even at low viscosities and high temperatures of the pumping medium, the pumps run extremely energy efficiently and highly dynamically over a wide speed range due to the radical and axial gap compensation.However, with variable speed operation certain boundary conditions should be observed. The exemplary cycle shown below illustrates this clearly.

 

I. Start: Eckerle internal gear pumps able to build up pressure from standstill. This happens smoothly when the pump starts from an unpressurized state. Please talk to Eckerle, if due to the system design the pump is pressurized at standstill.

II. Pump Operation: Eckerle internal gear pumps are capable of providing a speed-dependent volumetric flow at any pressure level during pump operation. However, application limits of the respective sizes must be observed.

III. Deceleration: With Eckerle internal gear pumps very high decelerations can be achieved, it must be ensured though that line-dependent pressure peaks can develop within the suction side. These should not exceed the maximum permissible inlet pressure.

IV. Pressure Holding Operation: Eckerle internal gear pumps are able to build up high pressures even at very low speed due to the gap compensation, hold pressure operation is thus extremely energy-efficient. Pump operation should follow after the hold pressure operation to flush out the pump.

V. Reverse Operation: Eckerle internal gear pumps are usually able to run highly dynamically in the oppsite direction of rotation in order to lower pressure peaks, or by means of a hydraulic motor. However, it must be ensured that the output pressure is always higher than the input pressure.

VI. Acceleration: With Eckerle internal gear pumps very large speed-ups can be run. These are limited by inlet pressure, geometry of the suction line and viscosity. However, these may not drop below the specified minimum inlet pressure of the series.

 

* To avoid critical operating points, we recommend taking measurements of the pump’s inlet and outlet pressure near the pump with a scanning rate of at least 1 kHz when a new pump cycle starts.

Model No.

EIPC3-RA23-1X,EIPC3-RB23-1X,EIPC3-RK23-1X,EIPC3-RK20-1X,EIPC3-RP30-1X,EIPC3-RK201X,EIPC5-RA23-1X,EIPC5-RB23-1X,EIPC6-RA23-1X,EIPC6-RB23-1X

Code

Model Code

Chart

Performance Curve

EIPC3

Testing condition: n = 1.450 min-1,Δ p = 250 bar,T = 50 °C,Medium: HLP 46

 

EIPC5.6

Testing condition: n = 1.450 min-1,Δ p = 250 bar,T = 50 °C,Medium: HLP 46

 

EIPC5.6

EIPC5.6

DWG

Measurement

Pump with SAE-2-B-hole flange and cylindrical shaft

Order Example: EIPC3-RA23-1X

 

Pump with SAE-2-B-hole flange and spline shaft

Order Example: EIPC3-RB23-1X

 

Pump with SAE-B-2-hole flange and cylindrical shaft with PTO through drive option

Order Example: EIPC3-RK23-1X

 

Double Pump with SAE-B-2-hole flange and cylindrical shaft

Order Example: EIPC3-RK20-1X+EIPC2-RP30-1X

 

Double pump with SAE-B-2-hole flange and cylindrical shaft

Order Example: EIPC3-RK20-1X+EIPH2-RP30-1X

 

Pump with SAE-C-2-hole flange and cylindrical shaft

Order Example: EIPC5-RA23-1X

 

Pump with SAE-C-2-hole flange and spline shaft

Order Example: EIPC5-RB23-1X

 

Pump with SAE-D-2-hole flange and cylindrical shaft

Order Example: EIPC6-RA23-1X

 

Pump with SAE-D-2-hole flange and spline shaft

Order Example: EIPC6-RB23-1X