RKV4G32D-F24C2 | 4.0 GPM 3200 PSI Triplex Pump Unloader Installed

RKV4G32D-F24C2 by Annovi Reverberi — RK Series Triplex Plunger Pump with Gymatic Unloader | 4.0 GPM | 3,200 PSI | Bronze Connecting Rods | 1″ Hollow Keyway Shaft | SAE J609A Gas and Diesel Engine Drive | No Chemical Injector

The RKV4G32D-F24C2 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 dependable Gymatic bypass pressure regulation and straight high-pressure water delivery. Rated at 4.0 GPM and 3,200 PSI at 3,400 RPM, the RKV4G32D-F24C2 delivers 12,800 cleaning units — combining the high-volume coverage speed of 4.0 GPM with 3,200 PSI pressure output for high-impact cleaning with strong rinse volume on 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-F24C2 is the standard no-injector C2 Gymatic configuration at 3,200 PSI — correct for operators managing chemical delivery externally or operating on straight high-pressure water output. At 3,200 PSI the C2 Gymatic operates with a full 450 PSI of headroom below its 3,650 PSI rated ceiling — the most comfortable Gymatic pairing in the RKV commercial lineup — producing stable, confident bypass regulation and extended unloader service intervals in high-cycle commercial environments.

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-F24C2 arrives as a complete, factory-tested assembly. Pre-filled with AR break-in oil, equipped with a Gymatic C2 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 RKV4G32D-F24C2 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-F24C2 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.
• No trailing I or G suffix — model terminates at C2, confirming straight 3,200 PSI water output without a factory-installed downstream chemical injector. Chemical delivery managed externally when required.

The RKV 3,200 PSI Family — Three Variants

The RKV 4.0 GPM / 3,200 PSI family includes three configurations on the same platform:

• RKV4G32D-F24C2 (this model) — Gymatic C2, no injector. Standard no-injector configuration for external chemical management or clean water output.
• RKV4G32D-F24C2G — Gymatic C2G assembly variant, no injector. Same fundamental Gymatic bypass architecture; G designates the specific assembly variant.
• RKV4G32D-F24C2I — Gymatic C2 with integrated downstream chemical injector. Two-mode wash capability: 3,200 PSI rinse and low-pressure detergent pre-soak.

Key Specifications

RKV4G32D-F24C2 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) — brass-body internal bypass unloader, adjustable pressure regulation, rated to 3,650 PSI; 450 PSI operating headroom above 3,200 PSI output
• Chemical Injector: Not included — no factory-installed downstream injector; chemical delivery managed externally
• Warranty: 5-year limited warranty — US-based coverage through AR North America

What’s Included in the Box

A Complete, Factory-Configured RKV4G32D-F24C2 Assembly Ready for Installation

• Factory-installed Gymatic unloader (C2) — pre-mounted and calibrated; no downstream injector port on this RKV4G32D-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 RKV4G32D-F24C2 including oil change intervals, water supply requirements, packing and valve service guidance, and winterization protocol
• Parts schematic — exploded-view diagram with AR part numbers for every serviceable RKV4G32D-F24C2 component
• Factory test certification — every RKV4G32D-F24C2 load-tested at 50%, 100%, and 150% of rated output before leaving the AR manufacturing facility

The Gymatic Unloader — 450 PSI Headroom at 3,200 PSI

Maximum Stability. Adjustable Bypass. Straight Water Output. External Chemical Compatible.

The Gymatic (C2) unloader on the RKV4G32D-F24C2 is rated to 3,650 PSI — providing 450 PSI of operating headroom above 3,200 PSI:

• 450 PSI — the most comfortable Gymatic headroom in the RKV lineup — 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-F24C2. Bypass transitions are smooth, protecting hoses, spray guns, and downstream accessories at every trigger release.
• 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 on the RKV4G32D-F24C2 in high-cycle commercial environments
• Adjustable then tamper-resistant — operating pressure set on-site and locked before production, maintained consistently across every operator and every 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.
• No factory-installed downstream injector — the RKV4G32D-F24C2 delivers straight 3,200 PSI water output. Compatible with downstream external chemical injectors, soft wash proportioners, and dedicated detergent systems when soap application is required.
• Engine load reduction in bypass — reduced back-pressure lowers engine load and fuel consumption during trigger-off idle intervals on full-day wash operations

Water Supply Requirements — Protecting the RKV4G32D-F24C2 Investment

Stable Supply. Clean Inlet. Proper Filtration.

Consistent, adequate water supply is essential to the RKV4G32D-F24C2’s rated performance and long internal component service life:

• Supply volume must exceed 4.0 GPM — insufficient inlet supply causes cavitation at the pump inlet, which accelerates valve and packing wear and causes pressure instability on the RKV4G32D-F24C2. Size tank-fed and gravity-fed systems to sustain flow above demand with margin for surge.
• Inlet filtration is standard service, not optional — a 50-mesh minimum inline strainer at the RKV4G32D-F24C2 inlet intercepts sand, scale, and debris before they reach valve seats and plunger seal interfaces. Service the strainer on the same schedule as oil changes.
• Low-restriction suction plumbing — oversized suction hose and short, straight inlet runs improve prime stability in trailer rigs, wash bays, and tank-fed setups. Hard 90° elbows immediately at the pump inlet restrict flow and contribute to cavitation risk.
• Airtight suction connections — air ingestion through loose fittings, cracked hose, or an unseated inlet strainer causes pressure fluctuation and accelerated packing and valve wear. Inspect and retorque suction connections as part of regular service on the RKV4G32D-F24C2.
• Temperature awareness — in high-duty wash bays where inlet water temperature can vary widely, keep inlet supply within the RKV4G32D-F24C2’s rated temperature range to protect seals and valve components.

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

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

• Solid ceramic plungers provide high wear resistance and thermal stability in demanding pressure washing operation on the RKV4G32D-F24C2 across extended commercial operating hours. Individual replacement when service limits are reached.
• Bronze connecting rods support strength and fatigue resistance for long duty cycles at rated speed on the RKV4G32D-F24C2, distributing forces evenly across the crankshaft
• Brass manifold provides corrosion resistance and long-term sealing integrity under fluctuating pressure in commercial wash environments
• Stainless steel valves improve durability and consistent sealing for steady pressure output under frequent start-stop cycles on the RKV4G32D-F24C2
• Triplex three-plunger design reduces pulsation compared to lower-grade pump designs, protecting hoses, guns, quick couplers, and downstream accessories connected to the RKV4G32D-F24C2

Front-Access Serviceability and Service Priorities

Planned Maintenance Beats Unplanned Downtime on the RKV4G32D-F24C2

• Front-access piston packings and valve assemblies — packing and valve service on the RKV4G32D-F24C2 is accessible from the front of the pump without full crankcase disassembly, reducing time and labor for the most frequent maintenance events in high-cycle commercial operation
• Oil service on schedule — follow manufacturer intervals to protect bearings and crankcase components under commercial duty. Break-in oil change at 50 hours; full service every 500 hours or 3–5 months.
• Monitor for early packing seepage — minor seepage caught during routine inspection and addressed at a scheduled stop costs a fraction of the downtime from a full packing failure during a production wash day on the RKV4G32D-F24C2
• Bypass heat management — minimize extended trigger-off idle to reduce thermal stress on seals. Ensure bypass plumbing is routed and sized appropriately for the RKV4G32D-F24C2’s 4.0 GPM bypass volume.
• Winterization is mandatory — flush and protect the RKV4G32D-F24C2 with RV-grade environmentally safe antifreeze for storage and transport in cold conditions to prevent cracked manifolds and destroyed seals.

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-F24C2’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-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
• Maintain rated RPM — govern engine speed to the RKV4G32D-F24C2’s rated 3,400 RPM. Overspeed conditions reduce packing service life; underspeed conditions reduce output pressure and flow.
• Rigid mounting — secure the RKV4G32D-F24C2 to minimize vibration transmission to bearings and shaft alignment under load. Avoid cantilevering hard discharge plumbing off the pump head.
• Included mounting hardware — bolts and fasteners sized for the F24 SAE J609A bolt pattern are supplied in the box with the RKV4G32D-F24C2

Typical Applications

Where the RKV4G32D-F24C2 Delivers Best Results

• Fleet washing — trucks, buses, delivery vans, and commercial vehicles requiring repeatable cleaning output and fast turnaround where the RKV4G32D-F24C2’s 4.0 GPM coverage speed and 3,200 PSI cleaning force handle heavy road film efficiently
• Construction equipment and jobsite washdown — equipment cleaning, concrete forms, and contractor wash skids where 12,800 CU output handles heavy contamination with chemical managed through a dedicated external system
• Agricultural operations — farm machinery, implements, barn washdown, and facility sanitation where both pressure and flow matter on gas or diesel engine-powered rigs
• Industrial wash bays — manufacturing plants and maintenance departments handling routine equipment wash and degreasing where the RKV4G32D-F24C2’s front-access serviceability and continuous-duty architecture minimize maintenance downtime
• Marine environments — dock and shipyard cleaning where dependable performance, stable pressure control, and the RKV4G32D-F24C2’s corrosion-resistant brass manifold and stainless valve construction are all operationally relevant
• Soft wash system rinse supply — the RKV4G32D-F24C2 provides clean 3,200 PSI / 4.0 GPM rinse water while a dedicated soft wash proportioner manages chemical delivery independently

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-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 RKV4G32D-F24C2 — solid ceramic plungers, bronze connecting rods, 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. Contractors, rental fleet operators, municipal purchasing departments, resellers, and volume buyers are invited to contact the WSHPWR wholesale team for pricing on the RKV4G32D-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.

12,800 Cleaning Units. 3,200 PSI. 4.0 GPM. 450 PSI Headroom. Clean Water Output. Front-Access Service.

Italian Engineering. High-Volume Commercial Platform. Continuous Duty Built. US Warranty Coverage.

For contractors, fleet operators, industrial maintenance teams, agricultural operations, and marine facility 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, straight water output for external chemical management, RK Series reinforced crankcase with front-access serviceability, bronze connecting rods, and a robust installation and maintenance architecture designed for professional continuous-duty use — the RKV4G32D-F24C2 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. No fixed 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.