SXWA4G50N | Triplex Pump, 4 GPM 5100 PSI, 1750 RPM, Dipstick & Oil

Overview

The Annovi Reverberi SXWA4G50N is a high-pressure, industrial-duty
triplex plunger pump designed for demanding wash systems, hydro-excavation support
circuits, and heavy equipment cleaning. Rated up to 4.0 GPM at 5,000 PSI
and engineered to run at 1,750 RPM, this SXWA-series model delivers
serious cleaning power while maintaining a manageable flow rate for controlled
overspray, efficient water usage, and straightforward recovery.

• Triplex plunger pump rated up to 4.0 GPM at 5,000 PSI for tough cleaning jobs.
• Designed for 1,750 RPM operation to reduce heat, vibration, and component wear.
• N-version 24 mm solid shaft for gas engine flange or belt / gearbox drive.
• Brass manifold, ceramic plungers, and aluminum crankcase for long service life.

High-Pressure Performance

The SXWA4G50N is built for applications where pressure is more important than raw
volume. At 5,000 PSI, it concentrates water energy into a tight, aggressive jet
capable of cutting through baked-on residues, road film, and compacted soils.
The 4 GPM flow rate provides enough volume to rinse effectively without overwhelming
smaller drains or reclaim systems.

• Max flow: 4.0 GPM – ideal for single-gun heavy-duty wash systems.
• Max pressure: 5,000 PSI – excellent for severe cleaning and prep work.
• Rated speed: 1,750 RPM for cooler running and extended seal life.
• Max fluid temperature: 140°F (60°C) for cold and warm water systems.

Triplex plunger design

A three-plunger layout keeps output smooth and predictable, improving operator
control and protecting downstream accessories. Precision valve timing and ceramic
plungers work together to maintain stable pressure across a wide range of nozzle
and hose combinations.

• Three synchronized ceramic plungers reduce pulsation and spray “hammer.”
• Balanced crankshaft design minimizes vibration transmitted to frames and skids.
• Stainless steel valve assemblies maintain tight sealing at high pressure.
• Optimized internal porting supports reliable inlet feeding and priming.

5,000 PSI duty point advantages

Operating at 5,000 PSI allows system designers to use smaller orifice nozzles to
generate high impact force while holding flow to a manageable level. This is
particularly useful where water supply is limited or where wastewater handling
costs are a concern.

• Excellent for surface prep, rust removal, and coating breakdown.
• Strong performance for fleet washing and undercarriage cleaning.
• Pairs well with turbo/rotating nozzles for concrete and steel.
• Supports accessory circuits in hydro-excavation and potholing rigs where focused cutting jets are needed.

Construction and Materials

The SXWA4G50N combines a forged brass manifold with an aluminum crankcase and
frictionless-style aluminum connecting rods. This mix of materials keeps weight
reasonable while delivering the durability required for professional pressure
washing and industrial cleaning environments.

• Manifold material: forged brass for strength and corrosion resistance.
• Crankcase: die-cast aluminum with cooling fins for efficient heat dissipation.
• Plungers: 18 mm solid ceramic plungers to resist scoring and wear.
• Rod material: aluminum connecting rods designed for high-duty cycles.

Wet-end durability

The wet end is engineered for continuous-duty use in harsh conditions with frequent
start–stop cycling and pressure fluctuations.

• Stainless steel valve assemblies for long life under high pressure.
• High-pressure packings and low-pressure seals to contain water and protect the crankcase.
• Generous inlet and discharge bosses: 1/2″ F inlet, 3/8″ F outlet for robust plumbing.
• Quality O-rings and gaskets to minimize leaks and simplify field service.

Drive-end and serviceability

With approximately 32 oz oil capacity and an easy-access crankcase,
the SXWA4G50N is designed for straightforward maintenance. Pumps are shipped
pre-filled with oil, and routine oil changes can be handled with standard tools
and basic service practices.

• 24 mm solid shaft “N” version for gas engine flange, belt-drive, or gearbox setups.
• Oil-bath lubrication with sight glass for quick level checks.
• Field-rebuildable with common valve kits, seal kits, and oil seal kits.
• Approximate weight of 35 lb – substantial enough for stability, light enough for mobile rigs.

System Integration

The SXWA4G50N is a flexible building block for both mobile and stationary systems.
It can be direct-coupled to a gas engine via flange, or used in belt-drive and
gearbox configurations to fine-tune pump speed and horsepower loading.

• Works in skid-mounted hot or cold water pressure washers.
• Integrates into trailer rigs for contractors and municipal fleets.
• Suitable for fixed wash bays where reliability and easy service are critical.
• Compatible with industry-standard unloaders, safety valves, gauges, and hose reels.

Typical system layouts

Designers commonly pair the SXWA4G50N with medium-frame gas engines and
heavy-duty accessories to build compact yet powerful systems.

• Gas engine direct-drive or belt-drive packages for contractor pressure washers.
• Support circuits on hydro-excavation and potholing trucks.
• High-pressure manifolds feeding single-gun or multi-gun stations (with proper valving).
• Custom OEM machinery for industrial wash, degreasing, and prep lines.

Typical Applications

Thanks to its 4 GPM / 5,000 PSI performance and robust construction, the SXWA4G50N
fits a wide variety of professional cleaning markets where uptime and cleaning
speed are paramount.

• Fleet and truck wash – tractors, trailers, refuse trucks, mixers, and heavy equipment.
• Concrete and surface cleaning – pads, loading docks, parking decks, and sidewalks.
• Industrial maintenance – plants, fabrication shops, recycling facilities, and tank yards.
• Municipal and public works – equipment wash pads, tool cleaning, and grounds maintenance.
• Hydro-excavation & potholing – high-pressure cutting jets and accessory wash circuits.
• Agriculture – implements, trailers, and livestock facility washdown.

Key Specifications – SXWA4G50N

• Model: SXWA4G50N, SXWA series triplex plunger pump.
• Max flow: 4.0 GPM.
• Max pressure: 5,000 PSI.
• Max speed: 1,750 RPM.
• Shaft: 24 mm solid shaft, N version (gas engine / belt-drive compatible).
• Plunger diameter: 18 mm ceramic plungers.
• Manifold material: brass.
• Crankcase material: aluminum, finned for cooling.
• Oil capacity: approx. 32 oz (factory-filled; change at recommended intervals).
• Max fluid temperature: 140°F (60°C).
• Inlet: 1/2″ F.
• Outlet: 3/8″ F.
• Approximate weight: 35 lb.
• Country of origin: Made in Italy.