XWL50.20NB-DD | 13 GPM 3000 PSI Direct Drive Brass Pump Head

XWL50.20NB-DD | Direct Drive Hydraulic Pump | 13.2 GPM 2900 PSI | Forged Brass Head

XWL50.20NB-DD packs a remarkable amount of pump into 36 pounds: Annovi Reverberi’s XWL 50.20 platform delivering 13.2 GPM (50 L/min) at up to 2900 PSI (200 bar) at 1450 RPM, with AR’s published 25 HP rating, a forged brass head with solid-shaft construction (the N and B in the suffix, per AR North America’s own designation system), and a 13-tooth splined direct-drive interface. Compare it across the aisle: the RTX-class pump carrying this same duty point weighs twice as much. For builds measured against a weight budget — slide-in skids, tandem trailers, weight-rated truck bodies, cart systems — this is full flow-and-pressure capability from the lightest frame that produces it.

The forged brass head is the honest choice for the majority of duty: clean or municipal water, everyday fleet and equipment washdown, contractor rinse-and-strip work. Operations running daily detergent programs, salt exposure, or reclaimed water should step to the nickel-plated sibling, the XWL50.20HNB-DD, which armors the identical platform against that chemistry — but plain-water fleets get identical performance here without paying for plating their duty never stresses. Same pump, honest fork.

XWL50.20NB-DD Specifications

• SKU: XWL50.20NB-DD
• Configuration: Direct-drive hydraulic pump — 13T splined interface (F62-class, SAE J498 B)
• Pump: Annovi Reverberi XWL 50.20 (194-series frame), solid shaft, forged brass head
• Flow Rate: 13.2 GPM (50 L/min)
• Maximum Discharge Pressure: 2900 PSI (200 bar)
• Rated Speed: 1450 RPM — never overspeed
• Power Requirement: 25 HP (18.7 kW) at full duty, per AR’s published rating
• Inlet Port: 3/4″ F
• Discharge Port: 3/8″ F
• Maximum Fluid Temperature: 140°F
• Head Material: Forged brass with stainless-steel wet-end components
• Plungers: One-piece ceramic
• Weight: Approximately 36 lbs (16.5 kg)
• Nickel-plated head sibling: XWL50.20HNB-DD

Power Density Is the Spec

Every pound on a mobile wash system is paid for twice — once in payload and once in the structure that carries it. At 25 published horsepower from a 36-pound frame, the XWL50.20NB-DD delivers among the best power-to-weight in AR’s entire hydraulic range: the practical difference between a one-technician slide-in and a forklift install, between a tandem trailer that scales legal and one that doesn’t, between fitting the wash system in the tool compartment and giving up the deck. Operations that need this duty point with maximum-hours durability can step to the RTX-class frame at twice the mass; operations that need the weight back choose this pump. WSHPWR stocks both sides of that trade.

Hydraulic Supply Requirements

Annovi Reverberi’s published pairing for the XWL 50.20 platform is a gear 44cc motor drawing 71 L/min (18.8 GPM) of oil at 195 bar (2,828 PSI) — roughly 31 hydraulic horsepower delivered continuously. That wants a strong truck hydraulic system, a high-flow machine circuit, or a dedicated power unit; standard compact auxiliaries will run the XWL50.20NB-DD at reduced output. For alternative motors, size displacement to reach 1450 RPM via RPM ≈ 231 × hydraulic GPM ÷ displacement (in³), verify torque at working pressure, relieve within the motor’s rating, and provide return filtration and oil cooling for continuous duty. Call WSHPWR with your circuit’s flow and pressure and we will confirm the pairing before you order.

Forged Brass, Ceramic Plungers, Real Duty

Forged brass is the industry’s proven head material for clean-water commercial service — dimensionally stable at pressure, corrosion-resistant in ordinary supply, and fully serviceable with AR’s standard kits. Beneath it, one-piece ceramic plungers shed heat and shrug off abrasion, stainless wet-end components carry the valve work, and the 194-series crankcase with oil monitoring runs the same architecture the whole XWL family shares. The XWL50.20NB-DD is not a lesser version of anything: it is the correct build for the water most fleets actually pump.

Direct-Drive Architecture

The 13-tooth splined interface couples pump and hydraulic motor on one centerline — no belts, pulleys, guards, or field alignment, minimal side loading on bearings and seal packs, and output independent of host engine speed. Motor and pump separate independently at the interface when service calls, and the 36-pound frame keeps one-technician handling and tight-cabinet installs realistic.

Installation & Operation Notes

Confirm the spline and mounting interface against your motor before ordering. Mount horizontally, verify rotation at commissioning, and engineer the suction seriously: 13.2 GPM through the 3/4″ inlet demands flooded, filtered, unrestricted plumbing — buffer-tank feed is standard practice at this flow. Fit an unloader against working pressure plus appropriate relief protection, size nozzles to the 13.2 GPM duty point, hold 1450 RPM as the ceiling, and winterize before cold-weather storage.

Quality Assurance & Maintenance

Every XWL50.20NB-DD ships factory-tested for flow rate, pressure stability, and vibration. Maintenance follows AR’s standard schedule — crankcase oil changes, seal inspection, periodic valve checks with AR repair kits shared across the XWL family — on the friendly intervals a clean-water duty cycle earns.

XWL50.20NB-DD Key Features & Applications

• 13.2 GPM at 2900 PSI, 1450 RPM — RTX50-class duty from a 36-pound frame.
• Among the best power-to-weight in AR’s hydraulic range: 25 published HP at 16.5 kg.
• Forged brass head with solid-shaft construction — the correct spec for clean-water fleets.
• 13T splined direct drive — no belts, couplers, or alignment; independent motor/pump service.
• Published pairing: gear 44cc at 18.8 GPM / 2,828 PSI oil (~31 hydraulic HP).
• Nickel-plated XWL50.20HNB-DD sibling available for detergent, salt, and reclaimed-water duty — same platform, honest price fork.
• Ideal for weight-limited skids and trailers, fleet and municipal washdown, contractor rigs, and clean-water equipment cleaning at full flow and pressure.