Motor pump GMP Berarma

The GMP Berarma Motor Pump is an integrated direct-drive motor-pump unit, developed to reduce costs and dimensions and to simplify installation. The direct coupling eliminates joints, lanterns, and supports, ensuring perfect coaxiality between pump and motor shafts and preventing misalignments that could cause abnormal wear.

Designed for Berarma GR.05 and GR.1 pumps with displacements up to 32 cm³/rev and pressures up to 250 bar, it uses high-efficiency three-phase asynchronous electric motors with special flanges, with rated power from 0.75 kW to 7.5 kW. The unit can be mounted directly onto the hydraulic power pack; the use of anti-vibration mounts is recommended.

Models and Performance

• GMP-16: 16 cm³/rev, flow rate 23 l/min at 1450 rpm, max pressure 250 bar

• GMP-20: 20 cm³/rev, flow rate 29 l/min at 1450 rpm, max pressure 250 bar

• GMP-25: 25 cm³/rev, flow rate 36 l/min at 1450 rpm, max pressure 250 bar

• GMP-32: 32 cm³/rev, flow rate 47 l/min at 1450 rpm, max pressure 250 bar

Available with pressure compensator:

• PLP (mechanical) – PLP 05: H 20÷120 bar; L 15÷50 bar. PLP 1: H 30÷100 bar

• PHP (hydraulic) – PHP 05: H 20÷250 bar; PHP 1: H 20÷250 bar

Pump Technical Data

• Actual displacement: 17, 21, 26, 33 cm³/rev (±3% tolerance)

• Maximum operating pressure: 100, 120 or 250 bar depending on model

• Inlet pressure: 0.8 ÷ 1.5 bar absolute

• Maximum drain pressure: 1 bar

• Speed range: 800 ÷ 1800 rpm

• Direction of rotation: right-hand (clockwise viewed from shaft side)

• Shaft loads: radial and axial forces not allowed

• Fluids: HM ISO 6743-4; HLP DIN 51524-2; HEES ISO 15380 (FPM-Viton, Pmax 160 bar); HFD ISO 12922 (FPM-Viton, Pmax 160 bar); HFC ISO 12922 (water <40%, NBR, Pmax 100 bar, Vmax 1000 rpm, T <40°C)

• Operating viscosity: 22 ÷ 68 cSt; at startup max 400 cSt

• Viscosity index: minimum 100

• Fluid temperature at inlet: +15 / +60 °C

• Maximum contamination: 20/18/15 ISO 4406 – NAS 1638 Class 9

• Recommended contamination: 18/16/13 ISO 4406 – NAS 1638 Class 7

• Moment of inertia (kg·m²): 0.00012 – 0.015

• Single pump weight (kg): 7.4 – 54.3

Electric Motor Technical Data

Three-phase asynchronous motors, totally enclosed, externally ventilated, squirrel-cage rotor, dynamically balanced.

• Power: 0.75 – 7.5 kW

• Nominal speed: 1420–1460 rpm

• Efficiency depending on model: 82.5% – 90.4%

• Efficiency class: IE3

• Insulation class: F (IEC 34-1)

• Protection rating: IP55 (EN 60529)

• Nominal voltage: 230/400V ±10% 50Hz; 266/460V ±10% 60Hz

• Duty type: S1 (IEC 34-1)

• Cooling: bidirectional radial-blade fan, stamped sheet metal fan cover

• Frame, flanges and shields: die-cast aluminum alloy, unpainted

• Terminal box position: right-hand shaft side (left or top on request)

• Options: thermal protection, overcurrent protection, CSA-C/US marking, voltage/frequency variants

Technical Summary Table of the Main Features of GMP Berarma Motor Pump