HYD-RTD80.300HN Hydraulic Motor Pump | 21 GPM 4350 PSI

HYD-RTD80.300HN | Hydraulic Motor Pump | 21 GPM 4350 PSI | Nickel Head Industrial

HYD-RTD80.300HN is the foundation build of AR’s most versatile industrial platform: the RTD 80-300 — 21 GPM (80 L/min) at up to 4350 PSI (300 bar) on the 1000 RPM frame, per AR North America’s published ratings — with the HN nickel-plated brass head and the coupled-drive configuration that lets your system’s architecture decide the motor. Around this pump AR builds an entire family: the direct-drive spline version, the hot-water build, the stainless build, the Industrial continuous-duty build. The HYD-RTD80.300HN is the version underneath them all — the platform in its purest engineering form, specified when the drive arrives through a coupling, bell housing, or belt arrangement and the builder wants the family’s benchmark duty with nothing pre-decided.

The duty point is the industrial dual-threat: enough flow to jet, flush, and feed multi-operator systems; enough pressure to cut roots, strip failing coatings, and break heavy buildup. Municipal jetting, plant maintenance, heavy-fleet washdown, and contractor rigs all camp on 21-at-4350 because it refuses the flow-versus-pressure choice — and on the HYD-RTD80.300HN, it arrives wearing the nickel armor that survives the chemistry those trades run alongside.

HYD-RTD80.300HN Specifications

• SKU: HYD-RTD80.300HN
• Configuration: Coupled-drive industrial pump — shaft interface confirmed at order; direct-drive spline version available as the -DD variant
• Pump: Annovi Reverberi RTD 80-300 (418-series industrial frame)
• Flow Rate: 21 GPM (80 L/min), per AR North America
• Maximum Discharge Pressure: 4350 PSI (300 bar)
• Rated Speed: 1000 RPM — never overspeed
• Power Requirement: 65 HP (48.5 kW) at full duty, per AR North America
• Head Material: Nickel-plated brass (HN designation) with stainless wet-end components
• Plungers: Ceramic
• Weight: Approximately 128 lbs (58 kg), per AR North America
• Maximum Fluid Temperature: 140°F

How Much Hydraulic Flow and Pressure Do I Need?

Full duty asks roughly 76 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 76. Circuits that qualify: 44 GPM at 3,000 PSI, 38 GPM at 3,500 PSI, or 33 GPM at 4,000 PSI — dedicated truck power systems and purpose-built power units; no skid steer auxiliary reaches this class. Circuits that fall short: 30 GPM at 3,500 PSI delivers only ~61 HP and will not hold full duty. AR’s published pairing for this platform is the bent-axis piston 84cc motor at 311 bar and 93 L/min of oil — the Sunfab SCM class WSHPWR stocks as the RTD 80 companion — mated to the HYD-RTD80.300HN through a flex coupling or bell housing; electric and engine drives take the shaft through appropriate reduction to 1000 RPM. Relieve within the motor’s rating, filter returns at 10–25 microns, engineer cooling for shift-length duty, and call WSHPWR with your circuit’s numbers — we will confirm the match, and the motor, before you order.

The Family Foundation

Choosing within the 80.300 family is choosing how the platform meets your system, and the HYD-RTD80.300HN is the reference point the choices measure against. The -DD version trades the coupling for a hollow 14T spline and a motor on the centerline; the HW build adds hot-water capability; the SS build answers washdown chemistry with stainless; the Industrial build hardens the platform for continuous stationary duty. The foundation configuration wins whenever the drive is already decided by the system — an existing power unit, a common-base electric install, an engine through reduction — because the coupled architecture separates pump from motor for independent service, and because it is the family’s cleanest canvas: benchmark duty, nickel protection, nothing in the box your build did not ask for.

The Nickel Standard

The HN head is the platform’s answer to real industrial water and real industrial chemistry. Jetting runs recycled and gray water; plant work runs degreasers and process residues; municipal duty runs whatever the line delivers. Bare brass pits under that exposure until valve seats leak and pressure fades; the nickel plating over the HYD-RTD80.300HN’s forged head armors every wetted surface against it, and the 1000 RPM frame underneath — a third fewer strokes per gallon than compact speeds — stretches every consumable interval the plating protects.

Installation & Operation Notes

Mount horizontally on structure worthy of a 128-pound reciprocating machine, align the coupling to specification, guard the drive, and verify rotation at commissioning. Give suction the engineering 21 GPM demands: flooded, filtered, full-size inlet plumbing — buffer-tank feed is standard industrial practice. Fit an unloader and safety relief rated for the working pressure, size nozzles to the duty point, hold 1000 RPM without exception, flush after chemical exposure to let the nickel do its work, and winterize between cold-weather shifts.

Quality Assurance & Maintenance

Every HYD-RTD80.300HN is factory-tested for flow rate, pressure stability, and vibration before shipment. Maintenance follows the industrial RTD routine — scheduled crankcase oil service, seal inspection, periodic valve checks with AR’s 418-platform repair kits — on the intervals the slow frame and nickel protection jointly stretch. The coupled architecture adds its own economy: pump and motor dismount independently, so neither’s service ever bills for the other’s downtime.

HYD-RTD80.300HN Key Features & Applications

• 21 GPM at 4350 PSI on the 1000 RPM industrial frame — AR North America’s published benchmark duty.
• Needs ~76 hydraulic HP: 44 GPM at 3,000 PSI class circuits qualify — dedicated power systems only.
• Coupled-drive foundation of the 80.300 family: -DD, hot-water, stainless, and Industrial builds all stand on this platform.
• AR-published Sunfab 84cc piston pairing, stocked by WSHPWR as the platform’s companion motor.
• HN nickel-plated head armors the wet end against jetting water and plant chemistry.
• Ideal for municipal jetting rigs, plant and refinery maintenance, heavy-fleet washdown, contractor trucks, and coupled-drive industrial builds on existing power systems.