AR21599 RK1515 HYD 4.0 GPM Hydraulic Pump | F38 Flange Replacement

AR21599 | RK1515 HYD Pump with F38 Flange | 3.96 GPM 2200 PSI

AR21599 RK1515 HYD Pump with F38 Flange is a hydraulically driven Annovi Reverberi triplex plunger pump engineered for industrial and commercial cleaning systems that demand reliability, precision, and consistent output. Rated for 3.96 GPM (15 L/min) at up to 2200 PSI (150 bar) at 1450 RPM, the pump delivers stable pressure for continuous-duty operation, while the integrated F38 hydraulic flange provides accurate mounting alignment for direct coupling to a hydraulic motor — no belts, pulleys, or guards required.

The AR21599 is the bare pump-and-flange configuration, giving OEMs and integrators the freedom to pair it with the hydraulic motor that matches their machine’s available flow and pressure. It is the same proven RK-series platform used across AR hydraulic washdown packages, serving industrial cleaning rigs, agricultural washdown units, street sweepers, mobile service equipment, and heavy equipment wash stations.

AR21599 Specifications

• SKU: AR21599
• Pump Model: Annovi Reverberi RK 15.15 with F38 hydraulic flange
• Flow Rate: 3.96 GPM (15 L/min)
• Maximum Pressure: 2200 PSI (150 bar)
• Rated Speed: 1450 RPM
• Power Requirement: 5.6 HP (4.2 kW) shaft input at full duty, per AR’s published rating
• Inlet Port: 1/2″ F
• Outlet Port: 3/8″ F
• Maximum Fluid Temperature: 140°F
• Pump Head: Pressed brass
• Plungers: One-piece ceramic
• Drive Interface: F38 flange for direct hydraulic motor coupling
• Crankcase: Die-cast aluminum alloy with oil sight glass

Hydraulic Motor Sizing

The AR21599 requires 5.6 shaft horsepower at 1450 RPM for full 3.96 GPM at 2200 PSI performance. Annovi Reverberi publishes two matched gear-motor pairings for this pump: a 19cc gear motor drawing 31 L/min (8.2 GPM) of oil at 101 bar (1,465 PSI), or an 11cc gear motor drawing 17 L/min (4.5 GPM) at 179 bar (2,595 PSI) — choose the displacement that matches your circuit’s available flow. For other motors, size displacement to reach 1450 RPM using RPM ≈ 231 × hydraulic GPM ÷ motor displacement (in³) and confirm torque at your circuit pressure. Protect the motor with a properly set upstream relief valve, and include return-line filtration and adequate oil cooling for continuous-duty washing. Contact WSHPWR for a matched motor recommendation for your machine’s auxiliary circuit.

Heavy-Duty Pump Construction

The AR21599 pairs a corrosion-resistant pressed brass pump head with stainless-steel wet-end components for outstanding durability against wear, cavitation, and chemical attack. The brass manifold maintains strength under high pressure while resisting pitting and erosion, preserving smooth water flow and reliable sealing over the pump’s service life — ideal for demanding environments such as heavy industrial cleaning, agricultural washdown, and mobile hydraulic-powered systems.

Precision Ceramic Plungers & Crankshaft

Inside the pump, one-piece ceramic plungers provide superior heat dissipation and abrasion resistance, maintaining long-term performance under high-temperature and high-pressure conditions. The plungers are driven by a high-strength pressed steel crankshaft supported by oversized bearings for precise alignment and minimal friction. This balanced internal configuration promotes smooth operation with reduced vibration and mechanical stress, extending both pump life and overall hydraulic system efficiency.

Hydraulic Drive & F38 Flange Interface

The AR21599 is engineered specifically for integration into existing hydraulic circuits, allowing direct coupling to hydraulic motors for efficient, flexible power transmission. The F38 flange provides rigid, accurate alignment between pump and motor, reducing side load, vibration, and coupling wear while simplifying installation. By eliminating belts and pulleys, this hydraulic drive layout improves overall efficiency, lowers maintenance requirements, and keeps flow and pressure stable across varying loads in field applications.

Crankcase, Lubrication & Cooling

The crankcase is manufactured from die-cast aluminum alloy with a heat-dissipating exterior that promotes cooling and lubricant stability during extended runs. A sight glass allows quick oil-level checks, while a sealed fill cap and drain plug simplify scheduled oil changes. Paired with high-grade pump oil, this closed lubrication system reduces friction, minimizes component wear, and supports extended service intervals.

Seals, Valves & Serviceability

High-pressure seals and low-pressure packings are produced from advanced synthetic materials formulated to withstand heat, water, and detergent exposure. The double gasket sealing system and stainless-steel check valves provide precise sealing and rapid response, maintaining high volumetric efficiency over time. Intake and delivery valves are accessed through plugs in the head, allowing quick inspection or replacement and minimizing downtime during routine maintenance and field service.

Installation & Operation

Installation of the AR21599 is straightforward: the F38 flange ensures accurate mechanical coupling to standard hydraulic motors, and the compact footprint fits cleanly into confined spaces and mobile equipment frames. The unit mounts horizontally for stable, vibration-free operation, with positioned inlet and outlet ports that simplify hose routing and future service access. Confirm motor rotation before commissioning, keep suction plumbing short and unrestricted, and pair the pump head with a properly sized unloader and relief valve for the working pressure.

Quality Assurance & Maintenance

Every AR21599 is manufactured under Annovi Reverberi’s strict quality control standards and factory-tested for flow rate, pressure stability, and vibration tolerance before shipment. Routine maintenance is limited primarily to oil changes, seal inspections, and periodic valve checks at recommended service intervals. Corrosion-resistant materials, precision machining, and sealed components keep upkeep low and support long service life even in harsh environments.

AR21599 Key Features & Applications

• Hydraulically driven triplex plunger pump rated 3.96 GPM at 2200 PSI, 1450 RPM.
• Pressed brass pump head with stainless-steel wet-end components for corrosion resistance.
• One-piece ceramic plungers and high-strength steel crankshaft on oversized bearings for smooth, efficient power transfer.
• F38 hydraulic flange for precise motor alignment and belt-free drive configuration.
• Die-cast aluminum crankcase with sight glass for easy oil monitoring.
• Double gasket sealing system and stainless-steel check valves for long-term sealing performance.
• Serviceable valve plugs and accessible ports for easy installation on mobile or stationary hydraulic systems.
• Ideal for industrial cleaning rigs, agricultural washdown units, mobile hydraulic systems, street sweepers, and heavy equipment wash stations.