RTX50-DD 13.0 GPM 4350 PSI Pump | Direct Drive Hydraulic

RTX50-DD | Direct Drive Hydraulic Pump | 13.2 GPM 4350 PSI | 13T Spline RTX

RTX50-DD is the pressure ceiling of the 13 GPM class: Annovi Reverberi’s RTX 50.300 platform in pump-only direct-drive form, rated at 13.2 GPM (50 L/min) and up to 4350 PSI (300 bar) at 1450 RPM with AR’s published 38 HP rating, wearing the hollow 13-tooth splined shaft that mounts your SAE B hydraulic motor directly. Set it next to the complete HYD-RTX50 package and the reason to buy bare becomes arithmetic: the package’s supplied Danfoss caps the system at 2900 PSI, while the RTX50-DD paired with a properly sized motor runs the same 13.2 gallons at 4350 — fifty percent more working pressure from the same 72-pound footprint, decided entirely by the drive you bolt on.

That headroom is where the serious builds live. Trailer jetters cutting roots and grease in mains rather than rinsing laterals. Compact hydro-excavation and potholing units that need genuine soil-cutting pressure without the mass of a 1000 RPM frame. Surface-prep and stripping rigs where 2900 PSI polishes and 4350 removes. The RTX50-DD is how those systems get RTD-class pressure numbers on builds the big frame would sink.

RTX50-DD Specifications

• SKU: RTX50-DD
• Configuration: Direct-drive hydraulic pump — hollow 13T splined shaft mounts directly onto an SAE B hydraulic motor
• Pump: Annovi Reverberi RTX 50.300 (366-series frame)
• Flow Rate: 13.2 GPM (50 L/min)
• Maximum Discharge Pressure: 4350 PSI (300 bar)
• Rated Speed: 1450 RPM — never overspeed
• Power Requirement: 38 HP (28.3 kW) at full duty, per AR’s published rating
• Drive Interface: Hollow 13-tooth splined shaft, F56-class close-couple flange (SAE J498 B101)
• Inlet Ports (2): 1″ F
• Discharge Ports (2): 1/2″ F — high-pressure rated fittings only
• Maximum Fluid Temperature: 140°F
• Plungers: Ceramic
• Weight: Approximately 72 lbs (32.5 kg)

Hydraulic Supply Requirements

Annovi Reverberi publishes two factory motor pairings for this platform, both landing near 46 hydraulic horsepower: a gear 90cc motor on 142 L/min (37.5 GPM) of oil at 146 bar (2,117 PSI) for flow-rich systems, or a piston 64cc on 102 L/min (26.9 GPM) at 203 bar (2,944 PSI) where the circuit carries pressure instead. Either way the RTX50-DD wants an engineered supply — a jetter or hydrovac truck’s dedicated system or a purpose-built power unit, with reservoir, return filtration, and cooling sized for continuous duty. For any other motor, target 1450 RPM via RPM ≈ 231 × hydraulic GPM ÷ displacement (in³), verify torque at working pressure, and cap the circuit with a relief protecting the motor. Call WSHPWR with your system’s flow and pressure and we will name the pairing before you order.

Package Pressure vs. Pump Pressure

The complete HYD-RTX50 package is the right buy when 2900 PSI covers the work and the included Danfoss simplifies the build. The RTX50-DD is the right buy when it doesn’t: the pump platform itself is a 300-bar machine, and only the bare-pump route with your own motor reaches it. Fleets already running the package can even step up in place — the pump end of this platform family shares the RTX footprint, so a system designed around the DD version keeps the deck layout while raising the ceiling. WSHPWR stocks both routes and will price the pump-plus-motor build against the package for your duty point.

Direct-Drive Architecture

The hollow 13T spline engages a male-splined SAE B motor at the F56 flange — no coupler, no belt, no field alignment, no guard to fabricate. One centerline keeps side load off bearings and seal packs, the RTX50-DD stays compact for trailer decks and skids, and motor or pump dismounts independently at the flange when service requires.

Installation & Operation Notes

Confirm the motor spline before ordering — 13T SAE B; the 14T SAE C motors from RTD-class systems will not engage. Mount horizontally, verify rotation at commissioning, and feed the dual 1″ inlets from a flooded, filtered supply: at 13.2 GPM and 300 bar, suction restriction converts directly into cavitation damage. Fit an unloader plus a safety relief rated for the working pressure, keep every downstream component rated for 4350 PSI with margin — nothing inherited from a 2900 PSI package goes on unverified — size nozzles to the 13.2 GPM duty point, hold 1450 RPM, and winterize before cold-weather storage.

Quality Assurance & Maintenance

Every RTX50-DD ships factory-tested for flow rate, pressure stability, and vibration. Service follows the shared RTX pattern — scheduled crankcase oil changes, seal inspection, and in-place valve checks with common AR repair kits — with seal condition watched proportionally to the 300-bar duty point.

RTX50-DD Key Features & Applications

• 13.2 GPM at 4350 PSI (300 bar), 1450 RPM — the pressure ceiling of the 13 GPM class.
• Fifty percent more working pressure than the packaged HYD-RTX50, from the same 72-lb footprint.
• Two AR-published motor pairings — gear 90cc or piston 64cc, ~46 hydraulic HP either way.
• Hollow 13T splined shaft direct-drives from an SAE B hydraulic motor — no coupler or alignment.
• Ceramic plungers and in-place valve service on the shared RTX parts platform.
• Ideal for trailer jetters, compact hydro-excavation and potholing units, stripping and surface-prep rigs, and builders raising a package system’s ceiling.