RKV4G40HDF24VR3 4.0 GPM 4000 PSI Triplex Pump | VR

RKV4G40HDF24VR3 by Annovi Reverberi — RK Series Heavy-Duty Triplex Plunger Pump with Gymatic VR35 Unloader | 4.0 GPM | 4,000 PSI | Bronze Connecting Rods | Reinforced Aluminum Crankcase | 1″ Hollow Keyway Shaft | SAE J609A Gas and Diesel Engine Drive | No Chemical Injector

The RKV4G40HDF24VR3 by Annovi Reverberi is an industrial-grade RK Series heavy-duty triplex ceramic plunger pump engineered for gas and diesel engine-driven contractor, fleet, and facility pressure washing systems requiring maximum-pressure output, extended continuous duty, and straight high-pressure water delivery. Rated at 4.0 GPM and 4,000 PSI at 3,400 RPM, the RKV4G40HDF24VR3 delivers 16,000 cleaning units through a reinforced aluminum crankcase with bronze connecting rods, solid ceramic plungers, stainless steel valves, and an F24 SAE J609A direct-drive flange for close-coupling to gasoline or diesel engines.

The RKV4G40HDF24VR3 belongs to AR’s RK Series — a distinct industrial pump platform from the XMV, SXMV, and RR Series, featuring a reinforced aluminum crankcase architecture that dissipates heat effectively during continuous high-RPM operation and front-access piston packing and valve assemblies that simplify field maintenance without full disassembly. The HD (Heavy Duty) designation confirms the elevated internal construction standard: bronze connecting rods, reinforced crankcase, and industrial-duty component specification throughout. The Gymatic VR35 unloader provides direct pressure-matched regulation at 4,000 PSI — rated precisely at the pump’s maximum operating point for the most stable, tightly calibrated bypass control available at this duty level. No chemical injector. No IDR.

Built by Annovi Reverberi in Modena, Italy — with US-based operations, a domestic parts distribution network, and dedicated AR North America technical support — the RKV4G40HDF24VR3 arrives as a complete, factory-tested assembly. Pre-filled with AR break-in oil, equipped with a Gymatic VR35 unloader, and packaged with a vented dipstick, operator’s manual, and full parts schematic, this pump is ready to install from the moment it arrives. Protected by a 5-year US limited warranty through AR North America and built to be fully rebuilt rather than replaced, the RKV4G40HDF24VR3 is a long-term investment in industrial-grade maximum-pressure pump performance.

Decoding the RKV4G40HDF24VR3 Model Number

What Every Segment of This AR Pump Designation Tells You

The RKV4G40HDF24VR3 encodes pump series, output, duty specification, flange interface, and unloader family directly. Reading each segment confirms the RK Series platform, heavy-duty build, engine compatibility, and pressure regulation specification:

• RKV — Pump series: RK Series triplex plunger pump — a distinct AR industrial pump platform from the XMV, SXMV, and RR Series, built around a reinforced aluminum crankcase architecture with front-access serviceability designed for continuous industrial duty
• 4G40 — Performance rating: 4.0 GPM flow rate at 4,000 PSI maximum operating pressure — 16,000 cleaning units
• HD — Heavy Duty specification: elevated internal construction standard with reinforced crankcase construction and bronze connecting rods for maximum-output continuous industrial duty
• F24 — Flange type: SAE J609A direct-drive flange for RK Series ‘D’ version pumps — close coupling to gas or diesel engines with a 1″ I.D. cylindrical shaft (AR part AR41866)
• VR3 — Unloader system: Gymatic VR35 — AR’s elevated-capacity Gymatic unloader family rated to 4,000 PSI and 5 GPM, confirmed for RR, XM, and RK Series applications in the AR catalog. Direct pressure-matched regulation at the RKV4G40HDF24VR3’s maximum operating point.
• No trailing I or IDR suffix — the model terminates at VR3, confirming standard VR35 bypass operation without a downstream chemical injector. This pump delivers straight 4,000 PSI water output.

RK Series vs RR Series vs XMV/SXMV Series — Understanding the Platform Differences

The RKV4G40HDF24VR3 belongs to AR’s RK Series — one of four distinct pump platforms represented in this product family. Understanding platform differences ensures the correct pump and service parts are specified:

• RK Series (RKV) — industrial-duty platform with reinforced aluminum crankcase architecture, front-access piston packings and valve assemblies for simplified field maintenance, bronze connecting rods (HD variant), and Gymatic VR35 unloader compatibility confirmed in the AR catalog for RK Series applications
• RR Series (RRV) — heavy commercial and industrial platform with reinforced crankcase (HD variants) and bronze connecting rods; standard or HD build variants available at the same output ratings
• XMV/SXMV Series — commercial high-pressure platform with the XM Series crankcase architecture; aluminum or forged brass connecting rod configurations depending on variant

Confirm RK Series part numbers when sourcing service components for the RKV4G40HDF24VR3 — RK, RR, and XMV Series components are not interchangeable despite similar external dimensions on some parts.

Key Specifications

RKV4G40HDF24VR3 Technical Details at a Glance

• Flow Rate: 4.0 GPM (gallons per minute)
• Maximum Pressure: 4,000 PSI
• Cleaning Units: 16,000 (GPM × PSI)
• Operating Speed: 3,400 RPM
• Pump Type: RK Series heavy-duty triplex ceramic plunger pump — three-piston crankshaft-driven design for smooth, consistent maximum-pressure output
• Crankshaft Bore: 1″ hollow keyway — direct engagement with gas or diesel engine 1″ output shaft
• Crankcase: Reinforced aluminum — heat-dissipating architecture for thermal stability during continuous high-RPM maximum-pressure operation
• Manifold Material: Forged brass — dense, pore-free construction for corrosion resistance and sustained 4,000 PSI cycle integrity
• Plungers: Solid ceramic — exceptional hardness, wear resistance, and thermal shock resistance across extended maximum-pressure commercial operating hours
• Connecting Rods: Bronze (HD) — premium fatigue strength and wear resistance at 4,000 PSI / 4.0 GPM continuous duty cycles
• Valves: Stainless steel — precise seating geometry, scale resistance, and reliable performance under continuous 4,000 PSI cycling
• Serviceability: Front-access piston packings and valve assemblies for simplified field maintenance
• Lubrication: Oil-bath crankcase lubrication system with vented dipstick and sight glass
• Flange: F24 — SAE J609A direct-drive flange for RK Series ‘D’ version, 1″ shaft, gas and diesel engine compatible (AR part AR41866)
• Unloader System: Gymatic VR35 (VR3 code) — brass-body internal bypass unloader, adjustable pressure regulation, rated to 4,000 PSI and 5 GPM
• Chemical Injector: Not included — model terminates at VR3 with no injector suffix
• Warranty: 5-year limited warranty — US-based coverage through AR North America with domestic parts and service support

What’s Included in the Box

A Complete, Factory-Configured RKV4G40HDF24VR3 Assembly Ready for Installation

Every RKV4G40HDF24VR3 ships fully assembled, factory-tested for flow, pressure, and seal integrity, and field-ready:

• Factory-installed Gymatic VR35 unloader (VR3) — pre-mounted and calibrated for field-ready operation at 4,000 PSI; no downstream injector port on this RKV4G40HDF24VR3 variant
• AR factory break-in oil — crankcase pre-filled to the correct operating level for first startup without modification
• Vented dipstick — enables fast, accurate crankcase oil level checks while maintaining proper crankcase pressure relief during operation
• Clear oil sight glass — at-a-glance visual verification of crankcase lubrication level without removing the dipstick cap
• Mounting bolts and fasteners — hardware pre-selected and sized for F24 SAE J609A direct-drive flange installation on compatible 1″ shaft gas or diesel engines
• Operator’s manual — complete installation, startup, operating, and maintenance procedures for the RKV4G40HDF24VR3 including oil change intervals, packing and valve service guidance, and winterization protocol
• Parts schematic — exploded-view diagram with AR part numbers for every serviceable RKV4G40HDF24VR3 component for field and shop reference
• Factory test certification — every RKV4G40HDF24VR3 load-tested at 50%, 100%, and 150% of rated output before leaving the AR manufacturing facility

RK Series HD Construction — Reinforced Aluminum Crankcase and Bronze Connecting Rods

Industrial Architecture for Maximum-Output Continuous Duty

The RKV4G40HDF24VR3‘s Heavy Duty specification reflects elevated engineering at two critical points in the pump’s mechanical architecture — the crankcase structure and the connecting rod material — both specifically chosen for 4,000 PSI / 4.0 GPM continuous industrial operation:

Reinforced Aluminum Crankcase

The reinforced aluminum crankcase in the RKV4G40HDF24VR3 provides a combination of thermal management and structural performance that distinguishes the RK Series architecture:

• Active heat dissipation — aluminum’s high thermal conductivity allows the RKV4G40HDF24VR3 crankcase to dissipate friction-generated heat more effectively than iron or steel alternatives during continuous high-RPM maximum-pressure operation, maintaining lower operating temperatures at bearing and seal interfaces across extended duty cycles
• Reinforced structural integrity — the HD specification adds structural reinforcement to the aluminum crankcase architecture, providing the load-bearing capacity required at 4,000 PSI / 4.0 GPM continuous output while retaining the thermal advantages of aluminum construction
• Weight efficiency — aluminum’s lower density compared to iron crankcase materials reduces the overall pump assembly weight, an advantage for mobile contractor rigs, trailer-mounted systems, and skid installations where total weight directly affects equipment payload capacity

Bronze Connecting Rods

The bronze connecting rods in the RKV4G40HDF24VR3 HD specification provide premium crankcase performance at maximum industrial duty:

• Superior fatigue strength at 4,000 PSI — bronze alloys resist the repeated load cycling of maximum-pressure 4.0 GPM operation at 3,400 RPM more effectively than aluminum alternatives, extending connecting rod service life in the most demanding continuous industrial duty cycles
• Wear resistance at bearing interfaces — bronze’s tribological properties reduce wear at connecting rod bearing surfaces under elevated load conditions, particularly relevant at the 4,000 PSI maximum-output duty point of the RKV4G40HDF24VR3
• Thermal stability — bronze maintains dimensional stability across the temperature range of maximum-pressure continuous-duty operation within the aluminum crankcase environment, reducing thermal distortion at bearing surfaces

Front-Access Serviceability — The RK Series Maintenance Advantage

Field Maintenance Without Full Disassembly

One of the RK Series platform’s most operationally valuable features on the RKV4G40HDF24VR3 is the front-access design for piston packings and valve assemblies. In continuous commercial and industrial applications where pump maintenance frequency is highest, access architecture directly affects downtime:

• Front-access piston packings — piston packing replacement on the RKV4G40HDF24VR3 is accessible from the front of the pump without requiring full crankcase disassembly. This reduces the time and labor required for the most common seal maintenance event in high-cycle commercial operation.
• Front-access valve assemblies — inlet and outlet valve inspection and replacement on the RKV4G40HDF24VR3 is accessible without removing the pump from the engine mount in most installations, enabling valve service during scheduled maintenance windows rather than requiring full pump removal from the rig.
• Reduced maintenance downtime — for contractor rigs and commercial wash operations where the RKV4G40HDF24VR3 runs at maximum pressure daily, front-access serviceability translates directly into shorter maintenance windows and faster return to productive operation.

The Gymatic VR35 at 4,000 PSI — Direct Match, Stable Bypass, External Chemical Control

Precisely Rated at Operating Pressure. Set It. Lock It. All Day.

The Gymatic VR35 unloader (VR3) on the RKV4G40HDF24VR3 is rated to 4,000 PSI and 5 GPM — matched directly to the pump’s maximum operating pressure:

• Direct pressure-matched regulation — the VR35’s 4,000 PSI rating aligns precisely with the RKV4G40HDF24VR3’s maximum output, providing the tightest possible pressure regulation response at this duty point
• Adjustable then tamper-resistant — operating pressure set on-site and locked before production operation, held consistently across crew rotations and extended daily use without re-adjustment
• Smooth bypass transitions at 4.0 GPM — trigger-off bypass smoothly redirects the full 4.0 GPM flow at 4,000 PSI, preventing deadhead pressure spikes that accelerate seal and valve wear during idle intervals on industrial production wash jobs
• No downstream injector port — the RKV4G40HDF24VR3 delivers straight 4,000 PSI water output. Chemical delivery is managed externally through a dedicated downstream injector, soft wash proportioner, or separate chemical application system — giving operators and system builders full ratio control independent of the pump.
• Engine load reduction in bypass — reduced back-pressure in trigger-off bypass mode lowers engine load and fuel consumption during idle intervals on full-day maximum-pressure wash operations
• Brass body construction — resists corrosion from cleaning chemicals, chlorinated water, and sustained industrial field exposure at 4,000 PSI

Typical Applications

Where the RKV4G40HDF24VR3 Delivers Best Results

• Industrial equipment washdown in manufacturing and processing plants — continuous-duty 4,000 PSI output from the RKV4G40HDF24VR3 with front-access serviceability that minimizes maintenance downtime in production environments running multiple shifts
• Fleet washing for trucks, trailers, buses, and municipal service vehicles — 16,000 CU output efficiently removes heavy road film, grease, and contamination at high throughput with chemical delivery managed through an external system
• Concrete cleaning for sidewalks, parking structures, and service yards — maximum-pressure output from the RKV4G40HDF24VR3 with smooth triplex flow delivery that improves surface cleaner efficiency on large horizontal surfaces
• Agricultural machinery sanitation — tractors, sprayers, harvesters, and barn facilities on gas or diesel engine-powered rigs where maximum pressure and straight water output are the primary requirements
• Commercial building maintenance — exterior walls, facades, pavement, and loading dock surfaces requiring sustained maximum-pressure cleaning from portable contractor equipment
• Contractor-grade mobile pressure washing systems — trailer and skid-mounted rigs where the RKV4G40HDF24VR3’s compact direct-drive footprint, reinforced construction, and front-access serviceability all contribute to operational efficiency on diverse daily field jobs
• Soft wash system rinse supply — the RKV4G40HDF24VR3 provides clean 4,000 PSI water supply while a dedicated soft wash proportioner manages chemical delivery independently

5-Year US Warranty, Full Rebuildability, and Wholesale Pricing

Industrial-Grade Maximum-Output Performance Backed by Domestic Support

The RKV4G40HDF24VR3 is protected by Annovi Reverberi’s 5-year limited warranty through AR North America’s US-based warranty and service network. Every internal wear component of the RKV4G40HDF24VR3 — solid ceramic plungers, bronze connecting rods, forged brass manifold seals and o-rings, stainless valve seats and springs, Gymatic VR35 unloader service parts, piston packing kits, and crankcase bearings — is stocked domestically through AR’s authorized distribution channels.

With consistent maintenance — break-in oil change at 50 hours, scheduled oil changes every 500 hours or 3–5 months, regular valve and packing inspection using the front-access design at the service frequency appropriate for 4,000 PSI continuous-duty cycles, and proper winterization using RV-grade environmentally safe antifreeze — the RKV4G40HDF24VR3 is engineered for 10 or more years of productive maximum-pressure industrial service life. AR North America’s domestic parts depth ensures rebuild kits, plunger sets, packing kits, and Gymatic VR35 unloader service components for the RKV4G40HDF24VR3 are typically available same-week.

Contractors, rental fleet operators, industrial facility managers, resellers, and volume buyers are invited to contact wholesale@wshpwr.com for wholesale and special pricing on the RKV4G40HDF24VR3 and the complete Annovi Reverberi pump and unloader assembly line. WSHPWR maintains one of the most complete AR North America inventories available through any US web store — with thousands of AR products in stock and a continually expanding catalog.

16,000 Cleaning Units. 4,000 PSI. 4.0 GPM. RK Series Industrial Platform. Front-Access Service.

Italian Engineering. Reinforced Aluminum Crankcase. Front-Access Maintenance. US Warranty Coverage.

For contractors, industrial operators, fleet managers, and facility maintenance teams who need 4,000 PSI maximum pressure, 4.0 GPM maximum flow, the RK Series industrial platform’s reinforced aluminum crankcase with front-access piston packing and valve serviceability, bronze HD connecting rods, and Gymatic VR35 precision bypass regulation — with chemical delivery managed independently of the pump — the RKV4G40HDF24VR3 delivers a factory-tested, fully documented, and completely rebuildable assembly from one of the global pressure pump industry’s most trusted manufacturers. Sixteen thousand cleaning units. Direct drive. One-inch keyway shaft. VR35 precision regulation. Front-access service design. Five years of US warranty. A decade of industrial service life.

Volume buyers, resellers, and rental fleet operators can reach the WSHPWR wholesale team directly at wholesale@wshpwr.com to discuss pricing for quantity purchases across the complete Annovi Reverberi lineup — including pumps, unloader assemblies, and service parts.