AR26472 RK15.20 Hydraulic Pump | NPT Ports RK Series

AR26472 | RK15.20 Hydraulic Pump with NPT Ports | RK Series | 4.0 GPM 3000 PSI

AR26472 RK15.20 Hydraulic Pump is the genuine Annovi Reverberi RK-series pump in its NPT-port configuration — the version US installers reach for when they want American pipe threads straight out of the box. Rated at 4.0 GPM (15 L/min) and up to 3000 PSI (206 bar) at 1450 RPM per AR North America’s published specifications, this is the high-pressure RK 15.20 H platform that powers the HYD-RK1520 drive packages and countless OEM hydraulic washdown systems across skid steers, utility trucks, and industrial equipment.

Most AR pump heads carry BSP (British parallel) threads, which means every US installation starts with thread adapters — one more joint to source, seal, and troubleshoot. The AR26472 eliminates that step: its inlet and discharge ports are cut in NPT, so standard American fittings, nipples, and quick-disconnects thread directly into the head with conventional sealant. For fleet shops and OEM builders plumbing in US hardware, that means fewer parts on the BOM and fewer potential leak points in service.

AR26472 Specifications

• SKU: AR26472
• Pump Model: Annovi Reverberi RK 15.20 H (228-series frame), NPT-port version
• Related Package: Pump platform used in the HYD-RK1520 hydraulic drive package
• Flow Rate: 4.0 GPM (15 L/min)
• Maximum Pressure: 3000 PSI (206 bar), per AR North America
• Rated Speed: 1450 RPM
• Power Requirement: 7.5 HP (5.6 kW) shaft input at full duty, per AR’s published rating
• Drive Interface: F38 close-couple flange, SAE A 82.55 two-bolt; shaft Ø15.88 mm
• Inlet Ports: 1/2″ NPT
• Outlet Ports: 3/8″ NPT
• Maximum Fluid Temperature: 140°F
• Pump Head: Brass
• Plungers: One-piece ceramic
• Weight: Approximately 20 lbs (9.2 kg)

Hydraulic Motor Sizing

The AR26472 requires 7.5 shaft horsepower at 1450 RPM for full-duty performance. On the factory HYD-RK1520 package, the matched Danfoss motor draws approximately 7.5 GPM of oil at up to 2,500 PSI. Annovi Reverberi also publishes two gear-motor pairings for this pump: a 19cc gear motor drawing 31 L/min (8.2 GPM) at 135 bar (1,958 PSI), or an 11cc gear motor drawing 17 L/min (4.5 GPM) at 239 bar (3,466 PSI) — choose the displacement that matches your circuit’s available flow. For any other motor, size displacement to reach 1450 RPM using RPM ≈ 231 × hydraulic GPM ÷ motor displacement (in³) and confirm torque at your working pressure. Protect the motor with a properly set upstream relief valve, keep the return line low-restriction, and provide adequate oil cooling for continuous-duty washing.

Heavy-Duty RK-Series Construction

The AR26472 pairs a corrosion-resistant brass pump head with stainless-steel wet-end components engineered to shrug off wear, cavitation, and detergent exposure through years of continuous washdown service. One-piece ceramic plungers deliver superior heat dissipation and abrasion resistance, driven by a pressed high-strength steel crankshaft on oversized bearings for smooth, low-vibration operation. The die-cast aluminum crankcase includes an oil sight glass for quick level checks, and intake and delivery valves sit behind service plugs in the head for fast inspection or replacement without pulling the pump from the machine.

Installation Notes

Mounting follows standard F38 practice: bolt the hydraulic motor to the flange, confirm rotation direction before commissioning, and secure the pump horizontally for stable, vibration-free operation. Plumb the NPT ports with standard US fittings and thread sealant rated for hot water and detergents — no BSP adapters required. Keep suction plumbing short and unrestricted with flooded suction preferred, pair the head with an unloader properly set for your working pressure, and size nozzle orifices for the 4.0 GPM duty point. Check crankcase oil at the sight glass before first start.

Quality Assurance & Maintenance

Every AR26472 is manufactured under Annovi Reverberi’s quality control standards and factory-tested for flow rate, pressure stability, and vibration before shipment. Routine maintenance is limited to scheduled pump oil changes, seal inspection, and periodic valve checks — standard RK-series service using standard AR repair kits, so your existing parts stock covers it. Follow winterization procedures during cold-weather storage to prevent freeze damage to the head and valves.

AR26472 Key Features & Applications

• Genuine AR RK 15.20 H pump — 4.0 GPM at 3000 PSI, 1450 RPM, per AR North America ratings.
• NPT inlet and outlet ports accept standard US fittings directly — no BSP thread adapters.
• Same pump platform as the HYD-RK1520 hydraulic drive package.
• F38 close-couple flange interface (SAE A 82.55) for belt-free direct motor mounting.
• Brass head, stainless wet-end components, and one-piece ceramic plungers for continuous duty.
• Serviceable valve plugs and oil sight glass for fast field maintenance.
• Ideal for skid steer washdown systems, utility and service trucks, OEM equipment builds, and fleet maintenance rigs plumbed with US-standard hardware.