Rexroth Type Axial Piston Pump A2FO 28 Fixed Displacement

Bokin Electro-Hydraulic Technology (Foshan) Co., Ltd. is one of the leading manufacturers and suppliers of rexroth type axial piston pump a2fo 28 fixed displacement in China. If you're going to wholesale bulk durable rexroth type axial piston pump a2fo 28 fixed displacement made in China, welcome to get pricelist from our factory. All customized products are with high quality and competitive price.

▶ Series 6

▶ Size 28

▶ Nominal pressure / Maximum pressure: 400 / 450 bar

▶ Open circuit

▶ Fixed pump with axial tapered piston rotary group of bent-axis design, for hydrostatic drives in an open circuit

▶ For use in mobile and stationary applications

▶ The flow is proportional to the drive speed and displacement

▶ The drive shaft bearings are designed for the bearing service life requirements usually encountered in these areas

▶ High power density

▶ Small dimensions

▶ High total efficiency

▶ Economical design

▶ One-piece tapered piston with piston rings for sealing

• ▶ Direct-Hit System Flow Benchmark Most compact mobile hydraulic systems - skid steers, mini-excavators, agricultural loaders - are architected around 65–75 L/min auxiliary circuits. The A2FO28 produces 70 L/min at its nominal 2500 rpm, landing squarely in this band without flow-reducing orifices or bypass throttling. This eliminates a common source of parasitic heat generation and simplifies circuit design from the outset.

• ▶ Displacement-to-Weight Efficiency At 28.1 cc/rev in a 9.5 kg package, the A2FO28 achieves a displacement density of 2.96 cc per kilogram - the highest ratio within the sub-10 kg weight class across the Series 6 range. For equipment where every kilogram on the pump mount translates to payload penalty, this metric matters more than raw flow or torque figures. The NG23, sharing the same 9.5 kg mass, manages only 2.41 cc/kg.

• ▶ Bearing-Driven Torque Upgrade The ø25 mm splined shaft on the A2FO28 is dimensionally identical to the NG23's, yet its permissible torque rating rises from 146 to 179 Nm - a 23% increase absorbed entirely by internal bearing optimization rather than shaft enlargement. This means existing coupling, bell housing, and mounting interfaces designed for the NG23 can be carried over directly, avoiding mechanical redesign when upsizing.

• ▶ Thermal Cycling Consideration With 70 L/min passing through a 0.20 L case volume, the internal oil turnover rate reaches approximately 350 cycles per minute - significantly higher than the NG23's 285 cycles. In continuous-duty installations, this accelerated oil exchange reduces dwell time for heat dissipation within the case. System designers should verify that the reservoir and heat exchanger capacity account for this flow rate, particularly in closed-circuit conversions and high-ambient-temperature environments.

▶ How are bulk orders typically structured financially?

A 30% deposit secures production scheduling, with the remaining balance payable 7 days before shipment. For first-time buyers, Alibaba Trade Assurance is available as an additional safeguard.

▶ What warranty coverage applies to this pump?

The standard warranty period is 12 months from delivery. Coverage applies to material and manufacturing defects under specified operating conditions - fluid cleanliness, pressure, and temperature within published limits.

▶ Which logistics options handle heavy hydraulic components?

Sea freight is recommended for orders exceeding 50 kg total. For urgent replenishment, air freight and express courier are available. Rail freight is an option for overland routes within Asia and Europe.

▶ How do I choose between the A2FO23 and A2FO28 for my application?

If your circuit requires 55–60 L/min, the NG23 avoids oversizing. If your target flow is 65–75 L/min, the NG28 is the direct match. Both share the same 9.5 kg mass, 2500 rpm nominal speed, and ø25/ø30 shaft options - so the selection typically comes down to flow demand rather than mechanical integration constraints.

▶ Does the A2FO28 require any special considerations for continuous-duty operation?

Yes. At 70 L/min through a 0.20 L case volume, the internal oil cycling rate is high. Ensure the reservoir capacity is at least 1.5–2 times the pump flow (105–140 L) and that return-line cooling is adequate to maintain oil temperature within the 50–60 °C operating window.