HYD-RK2115 Hydraulic Triplex Pump | 5.5 GPM 2200 PSI

HYD-RK2115 | Hydraulic Triplex Pump | 5.5 GPM 2200 PSI | The Volume Upgrade

HYD-RK2115 is the compact class with more water in it: Annovi Reverberi’s RK 21.15 triplex plunger pump — 5.5 GPM (21 L/min) at up to 2200 PSI (150 bar) at 1450 RPM — in the hydraulic-drive-ready configuration for the motor your circuit chooses. Against the 4 GPM pumps that anchor the compact hydraulic world, the 21-frame’s extra gallon and a half is a 37% pace raise at the same working pressure: the trailer side that took four minutes takes three, the pen that took an hour takes forty-five minutes, and across a washdown shift the difference compounds into the last jobs of the day actually getting done.

Volume at moderate pressure is the honest specification for most washing, and the HYD-RK2115 is its compact standard-bearer. Mud, manure, feed residue, and road film rinse on flow — the water carries them off once modest pressure breaks adhesion — so the operation whose day is rinse-heavy gains more from gallons than from bar. Fleet yards, farms and stables, food-adjacent washdown, and service-truck duty all live exactly there, and the 2200 PSI ceiling keeps seal, valve, and hose wear on the friendly side of the curve while the flow does the work.

HYD-RK2115 Specifications

• SKU: HYD-RK2115
• Configuration: Hydraulic-drive-ready pump — motor not included; drive interface confirmed at order
• Pump: Annovi Reverberi RK 21.15 triplex plunger pump (228-series frame)
• Flow Rate: 5.5 GPM (21 L/min)
• Maximum Discharge Pressure: 2200 PSI (150 bar)
• Rated Speed: 1450 RPM — never overspeed
• Power Requirement: Approximately 10 HP at full duty
• Maximum Fluid Temperature: 140°F
• Pump Head: Corrosion-resistant brass with stainless wet-end components
• Plungers: One-piece ceramic

How Much Hydraulic Flow and Pressure Do I Need?

Full duty asks roughly 12 hydraulic horsepower delivered continuously — and here is that number the way your machine’s spec sheet states it: oil GPM × oil PSI ÷ 1,714 must reach about 12. Circuits that qualify: 8 GPM at 2,600 PSI, 7 GPM at 3,000 PSI, or 10 GPM at 2,100 PSI — ordinary skid steer auxiliaries, tractor remotes, and truck circuits clear this comfortably. Circuits that fall short: a light 5 GPM at 3,000 PSI remote delivers only ~9 HP and will not hold full duty. The stocked motor matches for the HYD-RK2115’s torque band are the HYDM160M (0.97 cid, the precise fit) and the HYDM180M (1.09 cid, bi-rotational — one part number for either rotation); relieve within the motor’s rating, filter returns at 10–25 microns, and provide oil cooling for continuous trigger-on duty. Call WSHPWR with your machine’s flow and pressure and we will name the motor — or ship it alongside the pump.

The 37% Argument

Washdown productivity is a coverage equation, and flow is its biggest lever below the stripping threshold. At 2200 PSI, a 4 GPM pump and the HYD-RK2115 break the same soils loose — but the 21-frame’s fan carries 37% more water to sweep them away, which reads directly as square footage per hour. For operations billing by the job or racing the daylight, that is the whole purchase case; for fleets, it compounds again in the schedule — one pump class up often means one fewer wash bay, one fewer operator-hour per truck, one earlier finish. The supply bill barely notices: two extra hydraulic horsepower buys the entire raise.

The Compact-Frame Constitution

The 228-series frame under the HYD-RK2115 is AR’s most fielded compact architecture, and the 21.15’s moderate duty point treats it gently: 150-bar loading at 1450 RPM keeps every consumable on the stretched-interval side of the family curve. The brass head carries stainless valves behind service plugs for inspection in place, ceramic plungers shed heat and shrug abrasive water, the die-cast crankcase carries an oil sight glass — and AR’s RK repair kits, the most widely stocked in the industry, keep every service a stock call.

Installation & Operation Notes

Mount the HYD-RK2115 horizontally, confirm hydraulic motor rotation at commissioning — gear motors are direction-specific, and reversed lines spin the pump backward — and feed the inlet from a flooded, filtered supply with plumbing sized to the 5.5 GPM appetite. Fit an unloader set against working pressure with relief protection, size the nozzle to 5.5 GPM at your target pressure — undersized nozzles waste the pace you bought — hold 1450 RPM as the ceiling regardless of available oil, and winterize before cold-weather storage.

Quality Assurance & Maintenance

Every HYD-RK2115 ships factory-tested for flow rate, pressure stability, and vibration. Maintenance is the familiar RK routine — crankcase oil changes, seal inspection, periodic valve checks with AR repair kits — on the friendly intervals the moderate 150-bar duty earns even at volume-pace hours.

HYD-RK2115 Key Features & Applications

• 5.5 GPM at 2200 PSI, 1450 RPM — the compact class’s volume upgrade on AR’s proven 21-frame.
• 37% more water than the 4 GPM class at the same pressure: square footage per hour is the payoff.
• Needs only ~12 hydraulic HP — ordinary auxiliary circuits qualify; the supply math speaks your machine’s terms.
• Stocked motor matches: HYDM160M precise fit or HYDM180M bi-rotational.
• 228-frame serviceability: in-place valve access and the industry’s most stocked repair kits.
• Ideal for fleet and farm washdown at pace, stables and pens, food-adjacent rinse duty, service trucks, and rinse-heavy operations that gain more from gallons than bar.