BERARMA P04 PUMPS CATALOG
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The P04 pumps are variable displacement vane pumps designed for high operating pressures, equipped with a hydraulic pressure control device that allows 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 down to zero while maintaining an almost constant pressure. Under zero-demand conditions, the pump only delivers oil to compensate for possible leakages and pilot flows.
The Berarma P04 Pumps are variable displacement vane pumps with a hydraulic pressure compensator. They instantly adjust the flow rate to match the circuit demand: once the set pressure is reached, the flow decreases until it reaches zero, maintaining an almost constant pressure; with zero demand, the pump only delivers the oil necessary to compensate for leakages and pilot flows.
Maximum operating pressure: 210 bar; adjustment range: 20 ÷ 210 bar.
Nominal displacement: 8 cm³/rev; actual: 8.4 cm³/rev (±3%).
Flow at 1450 rpm: 12 l/min.
Speed range: 350 ÷ 2000 rpm (ensure proper inlet line sizing at high speeds to avoid cavitation).
Direction of rotation: right-hand (clockwise) viewed from shaft side; shaft loads: radial and axial forces not permitted.
Moment of inertia: 0.000028 kg·m².
Approved fluids: HM (ISO 6743-4), HLP (DIN 51524-2), HEES (ISO 15380) and HFD (ISO 12922) with FPM-Viton seals and Pmax 160 bar; HFC (ISO 12922) with water <40%, NBR seals, Pmax 100 bar, Vmax 1000 rpm, T <40 °C. Operating viscosity: 22 ÷ 68 cSt; at startup (open outlet): max 400 cSt; viscosity index: ≥100 (ISO 2909). Fluid temperature at inlet: +15 ÷ +60 °C. Maximum contamination: ISO 4406 20/18/15 – NAS 1638 Class 9; recommended: ISO 4406 18/16/13 – NAS 1638 Class 7.
Connections Gas BSP: Suction 3/8″, Delivery 3/8″, Drain 1/4″. “G” flange: European type gear group 1, Gas BSP fittings. Single pump weight: S 2.9 kg · R 3.3 kg · D 3.6 kg · LR 3.6 kg · LD 3.9 kg.
S: single pressure stage (adjustment via screw and locknut).
R: single stage with remote adjustment via remote relief valve (recommended valves 2–5 l/min, tube ≤5 m).
D: dual pressure stage, electrical switching 24 VDC (DIN 43650 type A connector).
LR: Load Sensing in single stage, with optional remote adjustment (signal Δp taken after restrictor; recommended valves 2–5 l/min, tube ≤5 m).
LD: Load Sensing with two adjustable stages; MIN = Δp; switching 24 VDC (DIN 43650 type A).
Pressure: increase by turning clockwise (respect ranges; do not alter MIN for R/LR controls; in LD, MIN equals Δp).
Flow/displacement: mechanical regulator to limit maximum displacement; displacement reduction per screw turn: 5.3 cm³/rev; minimum displacement: not specified (*). Startup allowed with settings <50% if both pump and system are completely filled with fluid.
| Parameter | Value |
|---|---|
| Designation / Series | P04-8 |
| 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 |
| Direction of rotation | Right-hand (clockwise) viewed from shaft side |
| Shaft loads | No radial or axial forces allowed |
| Approved fluids | HM (ISO 6743-4) · HLP (DIN 51524-2) · HEES (ISO 15380) · HFD (ISO 12922) · HFC (ISO 12922) |
| Seal notes / limitations | HEES/HFD: FPM-Viton, Pmax 160 bar · HFC: water <40%, NBR, Pmax 100 bar, Vmax 1000 rpm, T <40°C |
| Operating viscosity | 22 ÷ 68 cSt |
| Viscosity at startup (open outlet) | 400 cSt max |
| Viscosity index (ISO 2909) | ≥ 100 |
| Fluid temperature at inlet | +15 ÷ +60 °C |
| Max acceptable contamination | 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 |
| Single pump weight — Control S | 2.9 kg |
| Single pump weight — Control R | 3.3 kg |
| Single pump weight — Control D | 3.6 kg |
| Single pump weight — Control LR | 3.6 kg |
| Single pump weight — Control LD | 3.9 kg |
| Pressure/flow controls | S · R · D · LR · LD |
| Connections | Suction 3/8″ Gas BSP · Delivery 3/8″ Gas BSP · Drain 1/4″ Gas BSP |
| Flange / Fittings | “G” flange (European gear group 1) · Gas BSP |
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Strada Statale 7 Via Appia, 68
82011 Airola (BN)
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83018 San Martino Valle Caudina (AV)
Tel.: +39 0823 950994
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E-mail: info@lubeteam.it