HYD-RK1528H-F38 | Hydraulic Drive Triplex Pump, 3.96 GPM 4000 PSI

HYD-RK1528H-F38 | Hydraulic Drive Triplex Pump | 3.96 GPM 4000 PSI | F38 Nickel Head

HYD-RK1528H-F38 is the pressure flagship of the flanged-pump shelf: Annovi Reverberi’s RK 15.28 H triplex plunger pump — 3.96 GPM (15 L/min) at up to 4000 PSI (280 bar class) at 1450 RPM — supplied with the F38 close-couple flange mounted and a nickel-plated head over the wet end, the H designation in AR North America’s own suffix system. No motor is included, by design: bolt your gear-type hydraulic motor to the flange and the drive is complete, with the motor decision left to your circuit, your inventory, and your build.

The duty point carries a résumé. Four-at-four-thousand is the classic surface-cleaner and flatwork specification — the pressure that lifts gum, tire marks, sealer, and embedded grime out of concrete that 3000 PSI machines only brighten — and it strips failing coatings, cuts graffiti, and breaks baked-on grease off equipment that soaking never touches. The RK 15.28 platform behind it is one of ARNA’s most fielded pumps for exactly that work, and the nickel plating extends the head’s life through the degreasers, strippers, and reclaimed water that pressure-led duty runs alongside.

HYD-RK1528H-F38 Specifications

• SKU: HYD-RK1528H-F38
• Configuration: Hydraulic-ready pump — F38 close-couple flange (SAE A 82.55) mounted; hydraulic motor NOT included
• Pump: Annovi Reverberi RK 15.28 H triplex plunger pump (228-series frame)
• Flow Rate: 3.96 GPM (15 L/min)
• Maximum Discharge Pressure: 4000 PSI (280 bar class)
• Rated Speed: 1450 RPM — never overspeed
• Power Requirement: Approximately 10.5 HP at full duty
• Head Material: Nickel-plated (H designation) with stainless wet-end components
• Inlet Port: 1/2″ F
• Discharge Port: 3/8″ F
• Maximum Fluid Temperature: 140°F
• Plungers: One-piece ceramic

Choosing the Motor

Full duty asks roughly 13 hydraulic horsepower, and the F38 flange turns the selection into one line — RPM ≈ 231 × hydraulic GPM ÷ displacement (in³) — targeting 1450 RPM with torque for the ~10.5 HP demand. Two stocked routes fit most machines: the HYDM160M (0.97 cid — about 6.1 GPM of oil, the precise match for this duty band) or the HYDM180M (1.09 cid — about 6.5 GPM, bi-rotational, one part number for either rotation). Verify your circuit sustains the flow at working pressure continuously, relieve within the motor’s rating, filter the return at 10–25 microns, and provide oil cooling — surface cleaning is trigger-on by the hour. Call WSHPWR with your machine’s numbers and we will name the motor, or ship it alongside the pump.

Where HYD-RK1528H-F38 – 4000 PSI Earns Its Keep

Cleaning speed on flatwork is set by pressure at the nozzle, not gallons on the ground: a surface cleaner runs at the pace its jets can lift soil from the pores of the concrete, and the jump from 3000 to 4000 PSI is the difference between two passes and one on stained pads, fuel islands, drive-throughs, and dumpster corrals. The same authority serves the prep trades — coating removal, rust scale, form release — where dwell time and chemicals otherwise fill the gap. Buyers whose duty runs to volume rinsing should look at the moderate-pressure F38 siblings instead; the HYD-RK1528H-F38 exists for the work where pressure is the product.

The Nickel Head Bonus

Pressure-led work is chemistry-adjacent work: degreasers ahead of the strip, strippers on the coatings, reclaimed water in the surface cleaner’s loop. All of it finds bare brass eventually, pitting valve seats until pressure fades and the parts bill arrives. The H head’s nickel plating armors every wetted surface against exactly that exposure — on this platform it is the difference between a wet end that shrugs off the chemical side of the trade and one that quietly bills for it.

The F38 Advantage

AR’s F38 system is the common language of compact hydraulic drive: an SAE A two-bolt close-couple that puts the gear motor on the pump centerline with no belts, pulleys, guards, or field alignment, and no side loading reaching bearings or seal packs. Motors interchange across the flanged family as fleets evolve — the same drive that runs the moderate-pressure pumps bolts to this one when the duty steps up — and output stays independent of the host machine’s engine speed.

RK-Series Construction

The 228-series frame carries AR’s proven compact architecture under the nickel: stainless wet-end components, one-piece ceramic plungers for heat dissipation and abrasion resistance, and a die-cast aluminum crankcase with oil sight glass. Intake and delivery valves sit behind service plugs for inspection without dismounting the HYD-RK1528H-F38, and AR repair kits keep the service path standard everywhere AR is sold.

Installation & Operation Notes

Mount horizontally and confirm hydraulic motor rotation at commissioning — gear motors are direction-specific, and reversed lines spin the pump backward. Feed the 1/2″ inlet from a flooded, filtered supply with short, unrestricted plumbing. Rate every downstream component — hose, wand, surface cleaner, nozzles — for 4000 PSI with margin; hardware carried over from 3000 PSI systems must be verified, not assumed. Fit an unloader set against working pressure with appropriate relief protection, size nozzle orifices to 3.96 GPM at working pressure, flush after chemical sessions to protect the nickel head, hold 1450 RPM, and winterize before cold-weather storage.

Quality Assurance & Maintenance

Every HYD-RK1528H-F38 ships factory-tested for flow rate, pressure stability, and vibration. Maintenance follows AR’s standard RK schedule — crankcase oil changes, seal inspection, periodic valve checks with AR repair kits — with seal condition watched proportionally to the 4000 PSI duty and the nickel head stretching valve-seat intervals through the chemistry.

HYD-RK1528H-F38 Key Features & Applications

• 3.96 GPM at 4000 PSI, 1450 RPM — the pressure flagship of the F38 flanged-pump shelf.
• The surface-cleaner spec: one-pass flatwork where 3000 PSI machines take two.
• Nickel-plated H head armors the wet end against the chemistry pressure work runs alongside.
• F38 flange mounted, motor sold separately — HYDM160M and HYDM180M are the stocked matches (~13 hydraulic HP).
• Proven RK 15.28 platform with standard AR repair kits on the 228-series frame.
• Ideal for surface-cleaner and flatwork rigs, coating and graffiti removal, fleet degreasing, prep-trade trucks, and F38 builds stepping up from the 2200–2500 PSI tier.