RKV4G32D-F24C2I | 4.0 GPM 3200 PSI Triplex Pump Unloader Installed

RKV4G32D-F24C2I by Annovi Reverberi — RK Series Triplex Plunger Pump with Gymatic Unloader and Chemical Injector | 4.0 GPM | 3,200 PSI | Bronze Connecting Rods | 1″ Hollow Keyway Shaft | SAE J609A Gas and Diesel Engine Drive

The RKV4G32D-F24C2I by Annovi Reverberi is a professional-grade RK Series triplex ceramic plunger pump engineered for gas and diesel engine-driven commercial and industrial pressure washing systems requiring 4.0 GPM high-volume output at 3,200 PSI with integrated downstream chemical application capability. Rated at 4.0 GPM and 3,200 PSI at 3,400 RPM, the RKV4G32D-F24C2I delivers 12,800 cleaning units — combining the high-volume coverage speed of 4.0 GPM with 3,200 PSI pressure output that handles heavy contamination, grease, road film, and large commercial surfaces — through a reinforced crankcase with bronze connecting rods, solid ceramic plungers, brass manifold, stainless steel valves, and an F24 SAE J609A direct-drive flange for close-coupling to gasoline or diesel engines.

The RKV4G32D-F24C2I carries the Gymatic (C2) unloader with active integrated downstream chemical injector — delivering the complete two-mode wash platform from a single factory-configured assembly. At 3,200 PSI the C2 Gymatic operates with a full 450 PSI of headroom below its 3,650 PSI rated ceiling — the most favorable Gymatic pairing in the RKV commercial lineup — producing stable, confident bypass regulation that extends unloader service intervals in high-cycle commercial environments. The integrated injector enables detergent draw without separate downstream hardware, simplifying system plumbing and reducing potential leak points.

Built by Annovi Reverberi in Modena, Italy — with US-based operations, a domestic parts distribution network, and dedicated AR North America technical support — the RKV4G32D-F24C2I arrives as a complete, factory-tested assembly. Pre-filled with AR break-in oil, equipped with a Gymatic C2I unloader and active downstream chemical injector, 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 RKV4G32D-F24C2I is a long-term investment in a high-output RK Series commercial pump platform capable of a decade of productive service life.

Decoding the RKV4G32D-F24C2I Model Number

What Every Segment of This AR Pump Designation Tells You

• RKV — Pump series: RK Series triplex plunger pump — AR’s industrial pump platform with reinforced crankcase and front-access piston packing and valve serviceability for continuous commercial duty
• 4G32 — Performance rating: 4.0 GPM flow rate at 3,200 PSI maximum operating pressure — 12,800 cleaning units
• D — Shaft version: Direct Gas/Diesel Drive — 1″ hollow keyway crankshaft bore for direct coupling to gasoline or diesel engine 1″ output shafts
• 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 3/B series internal bypass unloader, brass body, adjustable pressure regulation, rated to 3,650 PSI. At 3,200 PSI the C2 provides 450 PSI of operating headroom — the most comfortable Gymatic pairing in the RKV commercial lineup, well within AR’s accepted variance.
• I — Chemical injector: Included — a downstream soap and chemical injector is integrated into the Gymatic unloader assembly, enabling low-pressure detergent application without a separate injector fitting

RKV4G32D-F24C2I vs RKV4G32D-F24C2G — The RKV 3,200 PSI Platform Variants

Both pumps share the same RK Series platform, F24 flange, 1″ keyway shaft, reinforced crankcase, bronze connecting rods, front-access serviceability, and 4.0 GPM / 3,200 PSI / 12,800 CU output. The injector is the key difference:

• RKV4G32D-F24C2I (this model) — Gymatic C2 with integrated downstream chemical injector. Two-mode wash capability: 3,200 PSI rinse and low-pressure detergent pre-soak from a single factory-assembled unit.
• RKV4G32D-F24C2G — Gymatic C2G non-injector variant. Straight 3,200 PSI water output for external chemical management or clean water applications.

Key Specifications

RKV4G32D-F24C2I Technical Details at a Glance

• Flow Rate: 4.0 GPM (gallons per minute)
• Maximum Pressure: 3,200 PSI
• Cleaning Units: 12,800 (GPM × PSI)
• Operating Speed: 3,400 RPM
• Pump Type: RK Series triplex ceramic plunger pump — three-piston crankshaft-driven design for smooth, consistent high-pressure output
• Crankshaft Bore: 1″ hollow keyway — direct engagement with gas or diesel engine 1″ output shaft
• Crankcase: Reinforced — RK Series construction for continuous commercial duty
• Manifold Material: Brass — corrosion-resistant construction for sustained 3,200 PSI cycle integrity
• Plungers: Solid ceramic — exceptional hardness, wear resistance, and thermal shock resistance across extended commercial operating hours
• Connecting Rods: Bronze — premium fatigue strength and wear resistance at 4.0 GPM / 3,200 PSI continuous duty cycles
• Valves: Stainless steel — precise seating geometry, scale resistance, and reliable performance under continuous 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 (C2 code) with integrated downstream chemical injector — brass body, adjustable bypass regulation, rated to 3,650 PSI; 450 PSI operating headroom above 3,200 PSI output
• Chemical Injector: Included — downstream venturi injector integrated into Gymatic unloader assembly (“I” suffix confirmed)
• Warranty: 5-year limited warranty — US-based coverage through AR North America

What’s Included in the Box

A Complete, Factory-Configured RKV4G32D-F24C2I Assembly Ready for Installation

• Factory-installed Gymatic C2I unloader with active chemical injector — pre-mounted and calibrated with integrated downstream injector ready for detergent supply line connection on the RKV4G32D-F24C2I
• 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 RKV4G32D-F24C2I including oil change intervals, chemical injector care, and winterization protocol
• Parts schematic — exploded-view diagram with AR part numbers for every serviceable RKV4G32D-F24C2I component
• Factory test certification — every RKV4G32D-F24C2I load-tested at 50%, 100%, and 150% of rated output before leaving the AR manufacturing facility

Gymatic C2I Unloader — 450 PSI Headroom with Integrated Chemical Feed

Maximum Stability. Two-Mode Capability. Set It. Lock It. All Day.

The Gymatic (C2I) unloader on the RKV4G32D-F24C2I is rated to 3,650 PSI — providing 450 PSI of operating headroom above 3,200 PSI. Combined with the active downstream injector, this delivers the complete professional wash platform:

• 450 PSI headroom — maximum stability zone — the C2 at 3,200 PSI operates well below its rated ceiling, producing confident, stable bypass regulation throughout continuous production wash cycles on the RKV4G32D-F24C2I
• Extended unloader service life — bypass components operating with 450 PSI of headroom experience substantially less cumulative stress than near-ceiling configurations, extending the rebuild interval in high-cycle commercial environments
• Venturi-driven downstream injection — the injector integrated into the Gymatic body draws detergent, degreaser, or pre-soak solution from a supply container when the RKV4G32D-F24C2I operator switches to low-pressure application mode. No separate injector hardware required.
• Two-mode workflow at 4.0 GPM / 3,200 PSI — chemical pre-soak breaks down grease, road film, and embedded contamination on fleet vehicles, construction equipment, and commercial surfaces; full 3,200 PSI / 4.0 GPM rinse removes loosened material at 12,800 cleaning units of productive output
• Simplified plumbing — the combined unloader and injector assembly on the RKV4G32D-F24C2I minimizes fittings and potential leak points, making the overall system more compact and reliable than separately plumbed injector configurations
• Adjustable then tamper-resistant — locked operating pressure maintained consistently across every operator and job cycle without re-adjustment or drift
• Smooth internal bypass at 4.0 GPM — trigger-off bypass smoothly redirects the full 4.0 GPM flow, preventing deadhead pressure spikes during idle intervals. Minimize extended trigger-off idle time to prevent heat buildup in the bypass circuit.
• Injector maintenance — flush the RKV4G32D-F24C2I injector circuit with clean water after every detergent session to preserve long-term venturi function as detailed in the included operator’s manual.

RK Series Construction — Built for 3,200 PSI High-Volume Continuous Duty

Solid Ceramic. Brass Manifold. Bronze Connecting Rods. Front-Access Service.

• Solid ceramic plungers in the RKV4G32D-F24C2I resist abrasion, heat, and chemical attack at 3,200 PSI across extended commercial operating hours. Individual replacement when service limits are reached — no full pump replacement required.
• Bronze connecting rods handle high loads and long operating hours on the RKV4G32D-F24C2I without fatigue, distributing forces evenly across the crankshaft and supporting reliable operation in continuous commercial duty environments
• Brass manifold offers strength and corrosion resistance in harsh environments including chemical wash bays and outdoor installations on the RKV4G32D-F24C2I
• Stainless steel valves provide reliable sealing and quick pressure response for stable output even under frequent start-stop cycles on the RKV4G32D-F24C2I
• Triplex three-plunger design produces smooth, overlapping pressure pulses that reduce pulsation-induced fatigue stress on hoses, spray guns, and fittings throughout the wash system

Front-Access Serviceability — RK Series Maintenance Advantage

Packing and Valve Service Without Full Disassembly

• Front-access piston packings — packing replacement on the RKV4G32D-F24C2I is accessible from the front of the pump without requiring full crankcase disassembly, reducing time and labor for the most frequent seal maintenance event in high-cycle commercial operation
• Front-access valve assemblies — inlet and outlet valve inspection and replacement accessible without removing the RKV4G32D-F24C2I from the engine mount in most installations, enabling valve service during scheduled maintenance windows
• Reduced maintenance downtime — shorter service windows translate directly into faster return to productive operation for contractor rigs and commercial wash operations running the RKV4G32D-F24C2I at high output daily

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 RKV4G32D-F24C2I’s 4.0 GPM / 3,200 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
• Direct close-coupling — the RKV4G32D-F24C2I 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 footprint — ideal for skid frames, trailer rigs, and OEM pressure washer platforms where space and simplicity are critical
• Included mounting hardware — bolts and fasteners sized for the F24 SAE J609A bolt pattern are supplied in the box with the RKV4G32D-F24C2I

Typical Applications

Where the RKV4G32D-F24C2I Delivers Best Results

• Fleet wash systems — high-pressure cleaning of trucks, buses, trailers, and delivery vehicles where the RKV4G32D-F24C2I’s integrated injector enables detergent-assisted road film removal without additional hardware
• Construction equipment cleaning — degreasing and washing excavators, skid steers, loaders, and jobsite machinery where 3,200 PSI with chemical pre-treatment handles maximum contamination efficiently
• Agricultural washdowns — tractors, implements, and livestock facilities where soaps and sanitizers are often required, delivered through the RKV4G32D-F24C2I’s integrated injector without separate plumbing
• Industrial plant and yard maintenance — removing oil, grime, and residue from production areas, pads, and loading docks where 12,800 CU high-volume output provides productive daily cleaning results
• Mobile contractor rigs — professional pressure washing trailers and skids handling mixed residential, commercial, and industrial work where the RKV4G32D-F24C2I’s two-mode capability covers both heavy rinsing and chemical pre-soak in a single compact assembly

For operators who prefer a fully configured direct-drive system rather than a bare pump assembly, WSHPWR also carries complete gas and diesel engine pump packages ready to mount on a frame or trailer.

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

High-Output RK Series Performance Backed by Domestic Support

The RKV4G32D-F24C2I 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 RKV4G32D-F24C2I — solid ceramic plungers, bronze connecting rods, brass manifold seals and o-rings, stainless valve seats and springs, Gymatic C2I 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, chemical injector circuit flushing with clean water after every detergent session, and proper winterization using RV-grade environmentally safe antifreeze — the RKV4G32D-F24C2I is engineered for 10 or more years of productive commercial service life. Contractors, rental fleet operators, municipal purchasing departments, resellers, and volume buyers are invited to contact the WSHPWR wholesale team for pricing on the RKV4G32D-F24C2I 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.

12,800 Cleaning Units. 3,200 PSI. 4.0 GPM. 450 PSI Headroom. Integrated Chemical Feed.

Italian Engineering. High-Volume Two-Mode Platform. Front-Access Service. US Warranty Coverage.

For contractors, fleet operators, agricultural teams, and industrial maintenance professionals who need 4.0 GPM high-volume output at 3,200 PSI — with the Gymatic C2’s maximum 450 PSI operating headroom for the most stable bypass regulation in this pressure class, integrated downstream chemical injection for two-mode wash capability from a single factory-assembled unit, RK Series reinforced crankcase with front-access piston packing and valve serviceability, and bronze connecting rods for commercial-duty fatigue resistance — the RKV4G32D-F24C2I delivers a factory-tested, fully documented, and completely rebuildable assembly from one of the global pressure pump industry’s most trusted manufacturers. Twelve thousand eight hundred cleaning units. Direct drive. One-inch keyway shaft. Gymatic bypass with integrated injector. Front-access service design. Five years of US warranty. A decade of 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.