HYD-RTD-HW80.300HN-DD Hydraulic Pump | Hot Water 21 GPM 4350 PSI

HYD-RTD-HW80.300HN-DD | Hot Water Hydraulic Motor Pump | 21 GPM 4350 PSI | 1000 RPM

HYD-RTD-HW80.300HN-DD is the hot-water-rated 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. The HW designation is what separates it from the standard RTD80.300HN-DD sibling: wet-end sealing and materials specified for heated water service, so the pump survives the duty that quietly destroys cold-water units fed from a boiler or hot supply.

That combination — serious flow, serious pressure, hot water, and hydraulic drive — describes one job above all others: winter hydro-excavation. When frozen ground stops a cold-water hydrovac, heated water keeps cutting; the HYD-RTD-HW80.300HN-DD is the pump end built to take it. The same capability serves heavy equipment washdown with heated water, industrial process cleaning, food-plant sanitation support, and de-icing operations where both temperature and tonnage-class cleaning power are on the spec sheet.

HYD-RTD-HW80.300HN-DD Specifications

• SKU: HYD-RTD-HW80.300HN-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), hot-water-rated wet end
• 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
• Water Temperature: Hot-water rated — contact WSHPWR for the maximum inlet temperature for your duty cycle
• Plungers: Ceramic; bronze connecting rods on the industrial 418 frame
• Weight: Approximately 143 lbs (65 kg)

Why Hot-Water Rating Matters at This Duty Point

Heat is the hidden killer in high-pressure pumps: elevated inlet temperature softens standard packings, accelerates seal extrusion at pressure, and thins the lubricating water film on plungers. Feed a cold-water pump from a boiler and it may run for months — then eat seal kits on a schedule that wrecks your maintenance budget. The HYD-RTD-HW80.300HN-DD is specified for heated service from the start, with sealing materials selected to hold their properties at temperature and at full 4350 PSI working pressure. For hydrovac fleets that boiler-heat their water half the year, that difference is the gap between scheduled maintenance and mid-job failures at the worst possible time.

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 the reservoir, 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.

Direct-Drive Advantages

The HYD-RTD-HW80.300HN-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, which protects bearings and seal packs from the side loading that shortens life in belt-driven systems and keeps the installed footprint tight enough for hydrovac trucks and skids where deck space is spent by the inch. The 1000 RPM rated speed is a durability feature in itself: fewer cycles per gallon pumped means longer intervals between seal and valve service on equipment that runs all shift.

Industrial 418-Series Construction

The 418 frame is AR’s heavy industrial architecture: ceramic plungers, bronze connecting rods, a crankcase and drive geometry sized for continuous duty at power levels the compact frames never see, and serviceable valve access for maintenance without dismounting the HYD-RTD-HW80.300HN-DD from the truck. Combined with the hot-water wet end, it is built for the operator whose pump works harder in February than in July.

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 keep the suction line generously sized and flooded: at 21 GPM, inlet restriction causes cavitation that no pump survives long, and hot water lowers the cavitation margin further. 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 — a hot-water pump on a hydrovac truck is precisely the unit most exposed to hard freezes between shifts.

Quality Assurance & Maintenance

Every HYD-RTD-HW80.300HN-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 hot-water duty making oil-change discipline and post-job freshwater flushes even more valuable. AR repair kits and valve assemblies for the 418 platform keep the service path straightforward for fleet shops.

HYD-RTD-HW80.300HN-DD Key Features & Applications

• 21 GPM at 4350 PSI on a 1000 RPM industrial frame — hot-water rated for heated supply duty.
• The winter hydro-excavation pump: keeps cutting when frozen ground stops cold-water units.
• Hollow 14T splined shaft direct-drives from an SAE C hydraulic motor — no coupler or alignment.
• Slow 1000 RPM rated speed extends seal and valve service intervals under continuous duty.
• 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.
• Ideal for hydrovac fleets, heated washdown systems, industrial process cleaning, de-icing support, and food-plant sanitation infrastructure.