RKV4G32D | 4.0 GPM 3200 PSI Gasoline Triplex Pump

RKV4G32D — 4.0 GPM 3200 PSI Triplex Pump with 1″ Hollow Crankshaft

• The RKV4G32D is a high-output triplex ceramic plunger pump engineered for commercial and industrial cleaning systems that need 4.0 GPM at 3200 PSI working (3400 PSI max) in a compact, fast-speed package.
• Operating at 3400 RPM with a 1″ hollow crankshaft, it is designed for retrofit and custom builds where a standard shaft dimension is required to match existing engines.
• The pump’s hydraulic and mechanical design focuses on smooth operation, reduced pulsation, and reliable duty in applications where equipment sees frequent use and must come online without surprises.
• Built around ceramic plungers, stainless steel valves, and a robust crankcase, the RKV4G32D provides a durable core for professional wash equipment, contractor rigs, and fixed industrial systems.

Performance and Operating Characteristics

• The pump is rated for 4.0 GPM at 3200 PSI, providing a strong balance of impact and coverage for demanding wash tasks.
• This performance range is well suited to surface cleaners, rotary nozzles, and spray tools commonly used in contractor, fleet, and facility environments.
• When correctly driven at 3400 RPM, the RKV4G32D delivers consistent pressure at the gun with quick response as triggers cycle on and off throughout the day.

Flow, Pressure, and Duty Range

• 4.0 GPM supports mid-size to larger cleaning tools that need more volume than entry-level machines, improving job speed on driveways, pads, and building exteriors.
• 3200 PSI working pressure (3400 PSI max) provides enough force to cut through compacted grime, road film, and typical industrial contamination when paired with appropriate nozzles.
• The duty range is aimed at frequent-use commercial systems, including contractor trailers and shop-based units that operate for extended periods.
• Proper nozzle sizing and unloader adjustment allow operators to tune working pressure to the surface and application while staying within the pump’s rating.

High-Speed 3400 RPM Operation

• 3400 RPM operation allows direct coupling to many small engines including the Predator 13 HP 420cc, eliminating the need for separate belt reductions in many designs.
• The high-speed configuration keeps the pump physically compact, which is useful on tight frames, carts, and enclosed machinery cabinets.
• Internal geometry and bearing selection are configured to handle the higher shaft speed while maintaining acceptable temperature and vibration levels when properly installed.
• Correct alignment, balanced couplers, and secure mounting hardware are important to fully realize the pump’s long-term operating life at this speed.

Triplex Power Section and Internal Components

• The RKV4G32D uses a triplex plunger arrangement to provide smoother hydraulic output and less pulsation than simpler piston designs.
• This smoother flow profile improves operator comfort and helps protect hoses, guns, manifolds, and fittings from pressure spikes.
• The combination of ceramic plungers, stainless valves, and robust connecting rods supports stable volumetric performance over extended duty cycles.

Ceramic Plungers and Stainless Valves

• Ceramic plungers provide a hard, dimensionally stable surface for packings, which helps maintain sealing performance under repeated high-pressure strokes.
• Stainless steel valves are designed to seat cleanly and repeatedly, supporting consistent pressure build and efficient suction and discharge timing.
• Valve and seal groups are fully serviceable with standard kits, allowing shops to rebuild the hydraulic section rather than replace the entire pump.
• Internal components are selected to handle typical wash chemicals and water quality when used within manufacturer guidelines.

1″ Specialty Crankshaft and Mechanical Design

• A 1″ specialty crankshaft makes the RKV4G32D a strong candidate for retrofit projects where existing drives, couplers, or supports are built around this shaft dimension.
• The shaft is engineered for smooth rotation and secure torque transfer when matched with correctly sized couplers and drive components.
• Heavy-duty crankcase and bearings manage the combined radial and axial loads imposed by high-pressure triplex operation at 3400 RPM.

Crankcase, Bearings, and Lubrication

• Oil-bath crankcase provides continuous lubrication to crankshaft journals and bearings, helping to control wear and manage operating temperatures.
• Oversized bearings support the shaft and connecting rods, contributing to long service intervals when alignment and loading are kept within specification.
• Routine oil checks and scheduled oil changes are central to preserving the mechanical integrity of the drive section.
• External access points for oil service reduce downtime by making routine maintenance quick and straightforward.

Integration, Mounting, and System Design

• The pump is suited for integration into compact carts, skid frames, and fixed systems where a 1″ drive interface is either specified or already in place.
• Designers can use the specialty shaft as a direct match to custom couplings or as part of a standardized platform across multiple machines.
• Careful attention to baseplate stiffness, mounting bolt torque, and guard design helps keep vibration under control and supports bearing life.

Plumbing and Control Considerations

• The RKV4G32D should be paired with an appropriately sized unloader or regulator, relief valve, and thermal protection to safeguard the pump and connected components.
• Inlet plumbing should provide adequate flow with minimal restriction, ideally supported by a supply tank and filtration to minimize cavitation and debris.
• Discharge components—hoses, guns, manifolds, and fittings—must be rated for at least 3400 PSI with appropriate safety margin.
• Correct bypass routing and system layout help manage heat and protect seals during trigger-off or low-flow operation.

Service, Maintenance, and Documentation

• The pump is designed to be field-serviceable, with accessible fasteners and clearly defined seal, valve, and plunger groups.
• Maintenance programs typically include oil changes, seal and valve inspections, and confirmation of unloader function at defined hour intervals.
• Documentation and exploded views support accurate part selection for rebuild kits and replacement components.
• With proper maintenance and correct system design, the RKV4G32D (3400 PSI) supports long service life in demanding commercial environments.

Applications and Use Cases

• Concrete surface cleaning for driveways, sidewalks, loading docks, and parking pads using surface cleaners and rotary tools sized to the 4.0 GPM output.
• Heavy machinery washdown for construction, mining, and agricultural equipment, including loaders, excavators, tractors, and attachments.
• Fleet washing for service trucks, trailers, buses, and delivery vehicles where consistent high-pressure performance is required.
• Industrial facility cleaning and plant maintenance, including equipment pads, process areas, and general washdown.
• Contractor rigs and retrofit projects requiring a compact, high-output pump configured around a 1″ specialty crankshaft drive interface.