BERARMA C04 MINICENTRALINE CATALOG
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The C04 mini power units are equipped with variable displacement vane pumps with high operating pressure and a hydraulic-type pressure control device, allowing the delivered flow to instantly adjust according to the circuit’s demand.
Variable displacement vane pumps are positive displacement pumps; therefore, they deliver a maximum flow rate equivalent to their displacement multiplied by the rotational speed. The operating pressure is generated by the pressure losses the fluid encounters along its path through the system.
When the outlet pressure (in the system) reaches the pump’s set pressure, the delivered flow automatically adjusts to the system’s demand; once this value is reached, the pump reduces its flow rate down to zero while maintaining an almost constant pressure.
Under zero-demand conditions, the pump only delivers oil to compensate for possible leaks and pilot controls. The integration of a variable displacement vane pump and a hydraulic block enables the design of extremely compact and energy-efficient hydraulic systems in applications where pressure and/or flow control is required.
The C04 Berarma Mini Power Units are equipped with variable displacement vane pumps with high operating pressure, featuring a hydraulic pressure control device that instantly adjusts the delivered flow to the circuit’s demand.
These are positive displacement pumps that provide a maximum flow rate equivalent to displacement times rotational speed. The operating pressure is generated by pressure drops in the system. When the outlet pressure reaches the setpoint, the flow adapts to the demand, down to zero, maintaining constant pressure. In the absence of demand, the pump only delivers oil to compensate for leaks and pilot controls.
This series is designed to meet energy-saving and noise-reduction requirements in compact hydraulic systems that use fixed displacement external gear pumps. The declared advantages include:
Reduction of the number of components in the system
Reduction of electric power consumption
Reduction of oil heating
Reduction or elimination of heat exchangers
Significant noise reduction
Installation kit for main IEC motors form B14
Connections to standardized valve blocks (special versions available)
Maximum flow regulator to mechanically reduce displacement
Hydraulic, electric, and load-sensing control devices for flow/pressure regulation
Different types of seals depending on fluid and temperature
Maximum operating pressure: 210 bar (peaks >30% to be avoided)
Adjustment range: 20÷210 bar
Nominal displacement: 8 cm³/rev (actual 8.4 cm³/rev, ±3%)
Speed range: 350–2000 rpm
Inlet pressure: 0.8–1.5 bar absolute
Maximum drain pressure: 1 bar
Compatible hydraulic fluids: HM ISO 6743-4, HLP DIN 51524-2, HEES ISO 15380, HFD ISO 12922, HFC ISO 12922 (limitations depending on seals)
Operating viscosity: 22–68 cSt; at startup (open outlet) max 400 cSt
Minimum viscosity index: 100
Fluid temperature at inlet: +15 / +60 °C
Maximum contamination level: 20/18/15 ISO 4406 (NAS 1638 Class 9); recommended 18/16/13 ISO 4406 (NAS 1638 Class 7)
Weight: from 4.7 kg to 5.7 kg depending on control type
S: single-stage pressure control
R: single-stage with remote adjustment
D: dual-stage adjustable pressure with 24VDC switching
LR: single-stage Load Sensing with remote adjustment
LD: dual-stage Load Sensing, 24VDC switching
Standard: drain connection to tank
Alternative: drain through external heat exchanger
| Parameter | Value |
|---|---|
| Designation / Series | C04-8 |
| Nominal displacement (ISO 3662) | 8 cm³/rev |
| Actual displacement | 8.4 cm³/rev (±3%) |
| Flow at 1450 rpm | 12 l/min |
| Maximum operating pressure | 210 bar |
| Pressure adjustment range | 20 ÷ 210 bar |
| Maximum drain pressure | 1 bar |
| Inlet pressure | 0.8 ÷ 1.5 bar absolute |
| Speed range | 350 ÷ 2000 rpm |
| Rotation direction | Right-hand (clockwise viewed from shaft side) |
| Shaft loads | No radial or axial forces |
| Allowed fluids | HM (ISO 6743-4); HLP (DIN 51524-2); HEES (ISO 15380); HFD (ISO 12922); HFC (ISO 12922) |
| Seals | NBR; FPM-Viton |
| Limits for HEES / HFD | With FPM-Viton seals: Pmax 160 bar |
| Limits for HFC | Water < 40% · NBR seals · Pmax 100 bar · Vmax 1000 rpm · T < 40°C |
| Operating viscosity range | 22 ÷ 68 cSt (mm²/s) |
| Startup viscosity (open outlet) | 400 cSt max |
| Viscosity index (ISO 2909) | ≥ 100 |
| Fluid temperature at inlet | +15 ÷ +60 °C |
| Maximum acceptable contamination level | ISO 4406: 20/18/15 · NAS 1638: Class 9 |
| Recommended contamination level | ISO 4406: 18/16/13 · NAS 1638: Class 7 |
| Moment of inertia | 0.000028 kg·m² |
| Pump weight (Control S) | 4.7 kg |
| Pump weight (Control R) | 5.1 kg |
| Pump weight (Control D) | 5.4 kg |
| Pump weight (Control LR) | 5.4 kg |
| Pump weight (Control LD) | 5.7 kg |
| Available control types | S · R · D · LR · LD |
| Coil supply (D / LD) | 24 VDC · DIN 43650 type A connector |
| Flow regulator (max displacement) | Mechanical displacement reduction |
| Reduced displacement per screw turn | 5.3 cm³/rev |
| Minimum displacement | Not specified (*) |
| Main ports | Suction 3/8″ BSP Gas · Outlet “P” 1/4″ BSP Gas · Return “T” 1/4″ BSP Gas · Drain 1/4″ BSP Gas |
| Auxiliary ports | Gauge connection 1/4″ BSP Gas · Heat exchanger outlet/return 1/4″ BSP Gas · Check valve SAE 08 seat |
| Control R: remote command | 1/4″ BSP Gas |
| Controls LR / LD: Load Sensing port | 1/4″ BSP Gas |
| IEC B14 motor connection kit | M71 (X=20 mm, code 3300002071) · M80 (X=22 mm, code 3300002080) · M90 (X=32 mm, code 3300002090) · M100/M112 (X=58 mm, code 3300002100) |
Head Office:
Strada Statale 7 Via Appia, 68
82011 Airola (BN)
Legal Headquarters:
Via Tufara Scautieri, 6
83018 San Martino Valle Caudina (AV)
Tel.: +39 0823 950994
Fax: +39 0823 1607499
E-mail: info@lubeteam.it