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

HYD-RTD80.300HN-DD | Hydraulic Motor Pump | 21 GPM 4350 PSI | 1000 RPM Direct Drive

HYD-RTD80.300HN-DD is the workhorse configuration of Annovi Reverberi’s RTD 80.300 industrial platform — a large-frame 418-series triplex plunger pump delivering 21 GPM (80 L/min) at up to 4350 PSI (300 bar) on a slow-turning 1000 RPM frame, built for direct hydraulic drive via a hollow 14-tooth splined shaft. This flow-and-pressure combination is the defining duty point of modern hydro-excavation: enough pressure to cut compacted soil and clay, enough volume to move the spoil, on a frame engineered to do it shift after shift.

Beyond the hydrovac deck, the HYD-RTD80.300HN-DD serves heavy equipment washdown, surface preparation, industrial process cleaning, and municipal jetting support — anywhere the job needs RTX-class pressure with more flow than the 1450 RPM compact frames deliver, and the durability of a pump that turns 30% fewer cycles per gallon pumped.

HYD-RTD80.300HN-DD Specifications

• SKU: HYD-RTD80.300HN-DD
• Configuration: Direct-drive hydraulic pump — hollow 14T splined shaft mounts directly onto an SAE C hydraulic motor
• Pump: Annovi Reverberi RTD 80.300 platform (418-series industrial frame)
• Flow Rate: 21 GPM (80 L/min)
• Maximum Discharge Pressure: 4350 PSI (300 bar)
• Rated Speed: 1000 RPM — never overspeed
• Power Requirement: Approximately 55–60 HP at full duty
• Drive Interface: Hollow female 14-tooth splined shaft with F57-class close-couple flange (SAE J744 C127)
• Inlet Port: 1-1/2″ F
• Outlet Port: 1″ F
• Plungers: Ceramic; bronze connecting rods on the industrial 418 frame
• Weight: Approximately 143 lbs (65 kg)

Hydraulic Supply Requirements

This is dedicated-power territory: driving 21 GPM at 4350 PSI takes roughly 70 hydraulic horsepower delivered continuously at the motor. As reference, AR’s published pairings for the adjacent RTD 100.210 model run a piston 84cc motor at 314 bar and 93 L/min (24.6 GPM), or a 108cc motor at 243 bar and 120 L/min (31.7 GPM). Supply of that magnitude comes from a hydrovac truck’s dedicated hydraulic system or a purpose-built power unit — not a skid steer auxiliary circuit. Select the SAE C motor displacement to reach 1000 RPM at your available flow — RPM ≈ 231 × hydraulic GPM ÷ displacement (in³) — verify torque at working pressure, protect the motor with a correctly set relief, and engineer reservoir capacity, return filtration, and oil cooling for continuous duty at this power level. Call WSHPWR with your system’s flow, pressure, and cooling details and we will spec the motor and confirm the match before you commit.

Why 1000 RPM Matters

A compact 1450 RPM pump making 21 GPM would cycle its plungers 45% more times per gallon than the HYD-RTD80.300HN-DD does. Slower rotation is the RTD platform’s core durability advantage: every seal pack, valve, and plunger sees fewer strokes per shift, which translates directly into longer intervals between rebuilds on equipment that bills by the hour and loses money in the shop. For hydrovac and jetting fleets running full days at duty pressure, the 1000 RPM frame is the difference between scheduled maintenance and a rebuild calendar that runs the operation.

Direct-Drive Advantages

The HYD-RTD80.300HN-DD’s hollow 14T splined shaft slides directly onto a male-splined SAE C hydraulic motor — no coupler, no belt, no alignment procedure. Motor and pump share one centerline inside the rigid flange interface, protecting bearings and seal packs from side loading while keeping the installed footprint tight for trucks and skids where deck space is spent by the inch. One technician can swap the motor or the pump independently at the flange, which keeps repair paths simple for fleet shops.

Industrial 418-Series Construction

The 418 frame is AR’s heavy industrial architecture: ceramic plungers, bronze connecting rods, and a crankcase and drive geometry sized for continuous duty at power levels the compact frames never see. Valve access is serviceable in place, so inspection and replacement happen without dismounting the HYD-RTD80.300HN-DD from the truck.

Installation & Operation Notes

Confirm your hydraulic motor’s spline count and mount before ordering — this pump takes a 14T SAE C motor; 13T SAE B motors from RTX-class systems will not interchange. Mount horizontally, verify motor rotation at commissioning, and treat the suction side as mission-critical: at 21 GPM, undersized or restricted inlet plumbing causes cavitation that no pump survives long — plumb the 1-1/2″ inlet full-size from a flooded supply. Pair the discharge with an unloader and safety relief rated for the working pressure, size nozzles to the 21 GPM duty point, and never operate above 1000 RPM. Winterize thoroughly between cold-weather shifts.

Quality Assurance & Maintenance

Every HYD-RTD80.300HN-DD is factory-tested for flow rate, pressure stability, and vibration before shipment. Maintenance follows the industrial RTD pattern — scheduled crankcase oil changes, seal inspection, and valve checks with AR’s 418-platform repair kits — and the slow-turning frame stretches every one of those intervals compared with compact high-RPM alternatives. For heated-water duty, see the hot-water-rated HYD-RTD-HW80.300HN-DD variant of this same platform.

HYD-RTD80.300HN-DD Key Features & Applications

• 21 GPM at 4350 PSI on a 1000 RPM industrial frame — the defining hydro-excavation duty point.
• Hollow 14T splined shaft direct-drives from an SAE C hydraulic motor — no coupler or alignment.
• Slow 1000 RPM rated speed cuts plunger cycles per gallon and extends rebuild intervals.
• Ceramic plungers and bronze connecting rods on AR’s heavy 418-series industrial frame.
• Requires approximately 70 hydraulic HP — dedicated truck hydraulics or a purpose-built power unit.
• Hot-water variant available (HYD-RTD-HW80.300HN-DD) for boiler-fed winter operations.
• Ideal for hydrovac fleets, heavy equipment washdown, surface preparation, industrial process cleaning, and municipal jetting support.