RKV4G40HD-F24C2 4.0 GPM 4000 PSI Triplex Pump | 3400 RPM

RKV4G40HD-F24C2 by Annovi Reverberi — RK Series Heavy-Duty Triplex Plunger Pump with Gymatic Unloader | 4.0 GPM | 4,000 PSI | Bronze Connecting Rods | Reinforced Aluminum Crankcase | Front-Access Service | 1″ Hollow Keyway Shaft | SAE J609A Gas and Diesel Engine Drive | No Chemical Injector

The RKV4G40HD-F24C2 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 at 4,000 PSI and straight high-pressure water delivery without an integrated downstream chemical injector. Rated at 4.0 GPM and 4,000 PSI at 3,400 RPM, the RKV4G40HD-F24C2 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 RKV4G40HD-F24C2 belongs to AR’s RK Series industrial pump platform — built around 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 pump 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 unloader (C2) provides adjustable internal bypass pressure regulation at 4,000 PSI. No chemical injector — this pump delivers straight high-pressure water output for operators managing chemical delivery through a dedicated external downstream system or operating on clean water pressure alone.

Built by Annovi Reverberi in Modena, Italy — with US-based operations, a domestic parts distribution network, and dedicated AR North America technical support — the RKV4G40HD-F24C2 arrives as a complete, factory-tested assembly. Pre-filled with AR break-in oil, equipped with a Gymatic unloader, and packaged with mounting bolts and fasteners, 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 RKV4G40HD-F24C2 is a long-term investment in industrial-grade maximum-pressure pump performance.

Decoding the RKV4G40HD-F24C2 Model Number

What Every Segment of This AR Pump Designation Tells You

The RKV4G40HD-F24C2 encodes pump series, output, duty specification, flange interface, and unloader family directly:

• RKV — Pump series: RK Series triplex plunger pump — a distinct AR industrial pump platform built around a reinforced aluminum crankcase with front-access serviceability 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 with reinforced aluminum crankcase 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)
• C2 — Unloader code: Gymatic (C2 = Gymatic per AR suffix designation) — Gymatic series internal bypass unloader, brass body, adjustable pressure regulation
• No trailing I suffix — the model terminates at C2, confirming this pump delivers straight high-pressure water output without an integrated downstream chemical injector

RKV4G40HD-F24C2 vs RKV4G40HDF24VR3 — The RK Series 4,000 PSI No-Injector Variants

Both pumps share the same RK Series HD platform, F24 flange, 1″ hollow keyway shaft, reinforced aluminum crankcase, bronze connecting rods, and front-access serviceability at 4.0 GPM / 4,000 PSI. The difference is the unloader specification:

• RKV4G40HD-F24C2 (this model) — Gymatic (C2) unloader, no chemical injector. Straight 4,000 PSI water output on the standard Gymatic bypass platform.
• RKV4G40HDF24VR3 — Gymatic VR35 (VR3) unloader rated to 4,000 PSI and 5 GPM, no chemical injector. The VR35 is rated precisely at the pump’s maximum operating pressure, providing direct pressure-matched regulation at 4,000 PSI.

Verify with AR North America which unloader specification is correct for your 4,000 PSI operating requirements before selecting between these variants.

Key Specifications

RKV4G40HD-F24C2 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 with vented dipstick and sight glass
• Flange: F24 — SAE J609A direct-drive flange, RK Series ‘D’ version, 1″ shaft, gas and diesel engine compatible (AR part AR41866)
• Unloader System: Gymatic series (C2 code) — brass-body internal bypass unloader, adjustable pressure regulation
• Chemical Injector: Not included — model terminates at C2 with no injector suffix
• Warranty: 5-year limited warranty — US-based coverage through AR North America

What’s Included in the Box

A Complete, Factory-Configured RKV4G40HD-F24C2 Assembly Ready for Installation

Every RKV4G40HD-F24C2 ships fully assembled, factory-tested for flow, pressure, and seal integrity, and field-ready:

• Factory-installed Gymatic unloader (C2) — pre-mounted and calibrated for field-ready operation; no downstream injector port on this RKV4G40HD-F24C2 variant
• AR factory break-in oil — crankcase pre-filled to the correct operating level for first startup
• Vented dipstick — fast, accurate crankcase oil level checks with proper crankcase pressure relief
• Clear oil sight glass — at-a-glance visual verification of crankcase lubrication level
• Mounting bolts and fasteners — hardware 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 RKV4G40HD-F24C2 including oil change intervals, packing and valve service guidance, and winterization protocol
• Parts schematic — exploded-view diagram with AR part numbers for every serviceable RKV4G40HD-F24C2 component
• Factory test certification — every RKV4G40HD-F24C2 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 RKV4G40HD-F24C2‘s Heavy Duty specification reflects elevated engineering at both the crankcase structure and the connecting rod material — specifically chosen for 4,000 PSI / 4.0 GPM continuous industrial operation:

Reinforced Aluminum Crankcase

• Active heat dissipation — aluminum’s high thermal conductivity allows the RKV4G40HD-F24C2 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
• Reinforced structural integrity — the HD specification adds structural reinforcement to the aluminum crankcase, 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 reduces overall pump assembly weight, an advantage for mobile contractor rigs, trailer-mounted systems, and skid installations where total payload weight matters

Bronze Connecting Rods

• 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 the elevated load conditions of maximum-output continuous operation on the RKV4G40HD-F24C2
• Thermal stability — bronze maintains dimensional stability across the temperature range of maximum-pressure continuous-duty operation within the aluminum crankcase environment

Front-Access Serviceability — The RK Series Maintenance Advantage

Field Maintenance Without Full Disassembly

The RKV4G40HD-F24C2‘s front-access design for piston packings and valve assemblies is among the most operationally valuable features of the RK Series platform in commercial and industrial continuous-duty environments:

• Front-access piston packings — packing replacement on the RKV4G40HD-F24C2 is accessible from the front of the pump without requiring full crankcase disassembly, reducing the time and labor required for the most frequent seal maintenance event in high-cycle commercial operation
• Front-access valve assemblies — inlet and outlet valve inspection and replacement on the RKV4G40HD-F24C2 is accessible without removing the pump from the engine mount in most installations, enabling valve service during scheduled maintenance windows without full pump removal
• Reduced maintenance downtime — shorter maintenance windows translate directly into faster return to productive operation for contractor rigs and commercial wash operations running the RKV4G40HD-F24C2 at maximum pressure daily

Why No Chemical Injector Is the Right Specification for Many RKV4G40HD-F24C2 Applications

Straight 4,000 PSI Output. External Chemical Control. Maximum System Design Flexibility.

The RKV4G40HD-F24C2 without a chemical injector is the correct specification for applications where external chemical management is preferred or required:

• External downstream injector systems — operators running independently adjustable-ratio downstream injectors at 4,000 PSI gain chemical concentration flexibility that a fixed venturi injector cannot provide. External injection systems deliver precise ratio control without compromise on the RKV4G40HD-F24C2 platform.
• Soft wash and proportioner systems — soft wash operations managing chemical delivery through dedicated proportioning pumps or batch tanks keep the RKV4G40HD-F24C2 as a clean 4,000 PSI water supply source, maintaining independent chemical control at any dilution ratio
• Multi-pump industrial systems — OEM integrators building systems with multiple RKV4G40HD-F24C2 pump heads standardize chemical injection at the system level rather than managing individual pump-integrated injectors per head
• Regulatory separation requirements — industrial and food processing environments specifying that chemical dosing be separately valved and metered from the pressure water source use the RKV4G40HD-F24C2 as the clean pressure source in these architectures

F24 SAE J609A — Direct Drive for Gas and Diesel Engines

• Gasoline engine compatibility — direct bolt-up to commercial gas engines with a 1″ cylindrical output shaft and SAE J609A bolt pattern. Verify engine horsepower against the RKV4G40HD-F24C2’s 4.0 GPM / 4,000 PSI duty point before installation.
• Diesel engine compatibility — equally compatible with standard diesel engines equipped with a 1″ crankshaft and SAE J609A bolt pattern for contractor rigs and industrial equipment at 4,000 PSI
• Direct close-coupling — the RKV4G40HD-F24C2 mounts face-to-face against the engine with the 1″ hollow keyway crankshaft bore engaging the engine shaft directly, eliminating belt guards, pulleys, and tensioning hardware
• Compact installation envelope — direct coupling reduces skid and trailer frame dimensions for portable contractor rigs at maximum output
• Included mounting hardware — bolts and fasteners sized for the F24 SAE J609A bolt pattern are supplied in the box with the RKV4G40HD-F24C2

Typical Applications

Where the RKV4G40HD-F24C2 Delivers Best Results

• Industrial wash bays and manufacturing plant equipment — continuous-duty 4,000 PSI output from the RKV4G40HD-F24C2 with front-access serviceability that minimizes maintenance downtime in production environments running multiple daily shifts
• Fleet washing for trucks, trailers, buses, and municipal service vehicles — 16,000 CU output removes heavy road film, grease, and contamination efficiently with chemical delivery managed through an external downstream system
• Concrete cleaning for sidewalks, parking structures, and service yards — maximum-pressure output from the RKV4G40HD-F24C2 with smooth triplex flow delivery for surface cleaner efficiency on large horizontal surfaces
• Agricultural machinery washdown — tractors, harvesters, sprayers, and barn facilities on gas or diesel engine-powered rigs where maximum pressure and straight water output are primary requirements
• Commercial building and property maintenance — exterior walls, facades, loading docks, and pavement requiring sustained maximum-pressure cleaning from portable contractor equipment
• Mobile contractor rigs — trailer and skid-mounted systems where the RKV4G40HD-F24C2’s compact direct-drive footprint, reinforced HD construction, and front-access serviceability contribute to operational efficiency across diverse field jobs
• Soft wash system rinse supply — the RKV4G40HD-F24C2 provides clean 4,000 PSI water 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 RKV4G40HD-F24C2 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 RKV4G40HD-F24C2 — solid ceramic plungers, bronze connecting rods, forged brass manifold seals and o-rings, stainless valve seats and springs, Gymatic 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 RKV4G40HD-F24C2 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 unloader service components for the RKV4G40HD-F24C2 are typically available same-week.

Contractors, rental fleet operators, industrial facility managers, municipal purchasing departments, resellers, and volume buyers are invited to contact wholesale@wshpwr.com for wholesale and special pricing on the RKV4G40HD-F24C2 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. No Injector. Front-Access Service.

Italian Engineering. Reinforced Aluminum Crankcase. Bronze Rods. 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 bypass pressure regulation — with chemical delivery managed independently of the pump — the RKV4G40HD-F24C2 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. Gymatic bypass. No fixed injector. 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.