RGA4G30HN 4.0 GPM 3000 PSI | 1750 RPM Triplex Pump

RGA4G30HN 4.0 GPM 3000 PSI Industrial Triplex Pump

• The RGA4G30HN is a 4.0 GPM, 3,000 PSI industrial triplex plunger pump designed for contractors, rental fleets, and facilities that require dependable, day-in–day-out washing performance.
• Operating at 1,750 RPM, it runs in a low-speed range that helps control heat, reduce vibration, and extend the life of seals, bearings, and drive components under continuous or high-cycle duty.
• The triplex layout uses three ceramic plungers to deliver a smooth, controlled pressure curve, giving operators a steady spray pattern at the gun and reducing shock loading on hoses and fittings.
• Internal components and manifold geometry are engineered for repeatable hydraulic behavior across a wide range of operating conditions, from routine fleet washing to heavier industrial cleaning tasks.
• Built as a long-term serviceable assembly rather than a disposable unit, the pump can be maintained with standard valve, seal, and plunger kits to support multi-year operating cycles.
• This model fits well into commercial cold-water systems where reliability, easy service access, and predictable performance are more important than maximum peak pressure.

Performance & Operating Characteristics

• RGA4G30HN – Delivers 4.0 GPM at a working pressure of 3,000 PSI, providing strong cleaning impact for vehicle washing, construction equipment cleanup, and general facility maintenance.
• Low-speed 1,750 RPM operation helps limit internal friction and crankcase temperature, contributing to stable lubrication conditions and longer component life.
• Triplex plunger design produces a relatively low-pulsation output compared to axial or wobble-plate pumps, improving operator comfort and reducing strain on downstream accessories.
• Pressure and flow pairing is well suited to single-gun wash bays, medium-size surface cleaners, and extended wand work when the system is sized around the pump’s capabilities.
• Supports frequent stop–start operation typical of wash bays and service centers when paired with a properly sized unloader and correctly configured bypass plumbing.
• Provides a controlled, predictable feel at the spray gun, which is important when working near sensitive components, painted finishes, or confined spaces.

Construction, Materials & Pump Design

• Ceramic plungers provide a hard, polished surface that resists scoring and thermal checking, helping maintain seal integrity across repeated duty cycles.
• Forged brass manifold is designed to withstand the 3,000 PSI working range while offering good resistance to corrosion under typical wash-water and detergent conditions.
• Stainless steel valves are selected for reliable seating and long-term durability, limiting internal leakage and maintaining volumetric efficiency over time.
• High-strength connecting rods and crankshaft elements are sized for the low-speed operating envelope, supporting continuous or extended-duty operation when installed correctly.
• The crankcase is configured for splash lubrication and is supplied from the factory with break-in oil so the pump can be installed, aligned, and tested with minimal preparation.
• Integrated oil sight glass and vented dipstick provide simple access points for daily checks and routine oil service, supporting consistent lubrication management.

RGA4G30HN – System Integration & Drive Options

• Standard shaft configuration allows integration with belt-drive or direct-coupled electric motor systems, depending on the requirements of the installation.
• Suitable for use with gas engines through pulley sets and gear reduction where 1,750 RPM pump speed is required from a higher engine speed.
• Can be mounted on skids, frames, wall brackets, or within cabinets as part of a complete cold-water pressure washer system.
• Works with common unloaders, pressure regulators, safety relief valves, and thermal dump valves to build a balanced system that protects both pump and operators.
• Inlet and discharge orientation supports clean routing to filters, hose reels, manifolds, and accessory circuits in both stationary and mobile systems.
• Compatible with a wide range of tools—guns, lances, rotary nozzles, surface cleaners, foamers—when they are sized appropriately for 4.0 GPM at 3,000 PSI.

Reliability, Serviceability & Maintenance Practices

• Low-speed pump geometry reduces transmitted vibration into the frame and plumbing, helping prevent fatigue-related leaks, loose fasteners, and premature component failure.
• Valve caps and packing assemblies are accessible with standard tools, allowing routine seal and valve service to be completed without specialized fixtures.
• Daily or shift-based inspection can include quick checks of oil level, inlet strainer condition, and general plumbing integrity using the built-in sight glass and dipstick.
• Proper inlet plumbing with adequately sized hose and filtration reduces the risk of cavitation, one of the main causes of accelerated wear in high-pressure pumps.
• Service intervals can be planned according to runtime hours and duty cycles, enabling fleet and facility managers to schedule maintenance around operational demands.
• Documentation and parts schematics support both in-house maintenance teams and external service providers responsible for rebuilds and overhauls.

Typical Applications & Use Cases

• Fleet and vehicle washing for trucks, buses, trailers, and rental cars where consistent performance and controlled pressure are required.
• Construction site cleanup and equipment washdown for loaders, skid steers, excavators, and support equipment returning from the job.
• Agricultural sanitation of tractors, implements, trailers, and livestock areas where regular washdown is part of routine operations.
• Concrete surface preparation and cleaning of pads, bays, aprons, and shop floors in industrial and commercial facilities.
• Maintenance wash bays in workshops, garages, and municipal service centers handling a mix of light and medium-duty cleaning tasks.
• Contractor and rental-fleet pressure washer builds that require a durable RGA4G30HN 4.0 GPM, 3,000 PSI triplex pump as the core of the system.