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

RTD80.300HN-DD | Hydraulic Pump Direct Drive | 21 GPM 4350 PSI | The RTD Standard

RTD80.300HN-DD is the reference configuration of Annovi Reverberi’s most consequential hydraulic platform: 21 GPM (80 L/min) at up to 4350 PSI (300 bar), turned at a deliberate 1000 RPM on the 418-series industrial frame, with a hollow 14-tooth splined shaft that direct-drives from an SAE C hydraulic motor. Those numbers are the modern hydro-excavation duty point — pressure that cuts compacted soil, volume that moves the spoil — and this standard-build version is the one the rest of the family is measured against.

It is also the right buy for most of the work. Cold or ambient water, clean supply, mobile duty on a hydrovac or jetter truck: that profile describes the majority of installations, and the RTD80.300HN-DD covers it at the family’s most accessible price. The variants exist for the exceptions — and knowing which exception you are is most of the specification.

RTD80.300HN-DD Specifications

• SKU: 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: 65 HP (48.5 kW) at full duty, per AR North America
• 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
• Head Material: Nickel-plated brass (HN designation)
• Plungers: Ceramic; bronze connecting rods on the industrial 418 frame
• Weight: Approximately 128 lbs (58 kg)

Choosing Within the 80.300 Family

One platform, five builds — and the RTD80.300HN-DD is the anchor. Feeding the pump from a boiler for winter hydrovac? The hot-water HYD-RTD-HW80.300HN-DD carries sealing specified for heated supply. Running road brine, seawater, or aggressive chemistry? The solid-stainless HYD-RTDSS80.300HN-DD removes corrosion from the equation entirely. Installing the pump as plant infrastructure that runs entire shifts at duty pressure? The RTD-I-80.300N-DD Industrial build is specified for continuous service. For everything else — which is most fleets, most seasons, most water — this standard configuration is the correct answer, and the budget difference funds nozzles, hose, and spares. WSHPWR stocks the whole family and will match the variant to your duty in one call.

Hydraulic Supply Requirements

Driving 21 GPM at 4350 PSI takes roughly 80 hydraulic horsepower delivered continuously — a hydrovac truck’s dedicated system or a purpose-built power unit, not an auxiliary circuit. AR’s published pairing class for the RTD family is the piston 84cc motor — the Sunfab SCM 084W WSHPWR supplies with the matching 14T SAE C spline — running the adjacent RTD 100.210 at 314 bar and 93 L/min (24.6 GPM) as the reference point. Select displacement to hold 1000 RPM at your available flow — RPM ≈ 231 × hydraulic GPM ÷ displacement (in³) — relieve within the motor’s rating, and engineer reservoir capacity, return filtration, and oil cooling for continuous duty at this power level. Send WSHPWR your system’s flow, pressure, and cooling numbers and we will confirm the drive before you order.

Why the Slow Frame Wins

The RTD80.300HN-DD makes its 21 gallons at 1000 RPM where compact frames spin 1450 — roughly a third fewer plunger strokes per gallon pumped, compounding across seals, valves, and packings for the service life of the unit. On equipment that bills by the hour and loses money in the shop, that arithmetic is the platform’s quiet superpower: rebuild intervals stretch, and the serviceable-in-place valve access keeps the inspections that remain inside a maintenance window instead of consuming one.

Direct-Drive Architecture

The hollow 14T splined shaft slides directly onto a male-splined SAE C hydraulic motor — no coupler, no belt, no alignment procedure, and no side loading reaching bearings or seal packs. Motor and pump dismount independently at the flange, keeping deck space tight and the repair path simple: one component out, not the whole assembly.

Installation & Operation Notes

Confirm the motor spline before ordering — 14T SAE C; 13T SAE B hardware from RTX-class systems will not engage. Mount horizontally, verify rotation at commissioning, and give suction the respect 21 GPM demands: flooded supply, honest filtration, full-size plumbing into the 1-1/2″ inlet — inlet condition is the single largest determinant of service life at this flow. Fit an unloader and safety relief rated for the working pressure, size nozzles to the 21 GPM duty point, hold 1000 RPM without exception, and winterize thoroughly between cold-weather shifts.

Quality Assurance & Maintenance

Every 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 — on the stretched intervals the 1000 RPM frame earns.

RTD80.300HN-DD Key Features & Applications

• 21 GPM at 4350 PSI on the 1000 RPM industrial frame — the defining hydro-excavation duty point.
• The standard build of the 80.300 family, and the correct spec for most fleets and most water.
• Hollow 14T splined shaft direct-drives from an SAE C hydraulic motor — Sunfab SCM 084W class recommended.
• Roughly a third fewer plunger cycles per gallon than 1450 RPM frames — rebuild intervals stretch accordingly.
• Requires approximately 80 hydraulic HP — dedicated truck hydraulics or a purpose-built power unit.
• Ideal for hydrovac fleets, sewer jetting support, heavy equipment washdown, surface preparation, and industrial cleaning systems on ambient, clean-water duty.