RKV4G36D-F24C2 4.0 GPM 3500 PSI Triplex Pump | 3400 RPM

RKV4G36D-F24C2 by Annovi Reverberi — RK Series Triplex Plunger Pump with Gymatic Unloader | 4.0 GPM | 3,600 PSI | Bronze Connecting Rods | 1″ Hollow Keyway Shaft | SAE J609A Gas and Diesel Engine Drive | No Chemical Injector

The RKV4G36D-F24C2 by Annovi Reverberi is a high-output RK Series triplex ceramic plunger pump engineered for gas and diesel engine-driven commercial and industrial pressure washing systems requiring 4.0 GPM volume at 3,600 PSI with dependable Gymatic bypass pressure regulation and straight high-pressure water delivery. Rated at 4.0 GPM and 3,600 PSI at 3,400 RPM, the RKV4G36D-F24C2 delivers 14,400 cleaning units — combining the high-volume coverage speed of 4.0 GPM with 3,600 PSI pressure output that handles heavy contamination, road film, grease, and large commercial surfaces more aggressively than standard 3,000–3,200 PSI commercial platforms — through a reinforced crankcase with bronze connecting rods, solid ceramic plungers, and an F24 SAE J609A direct-drive flange for close-coupling to gasoline or diesel engines.

The RKV4G36D-F24C2 is the no-injector configuration — correct for operators managing chemical delivery through a dedicated external downstream injector, soft wash proportioner, or operating on straight high-pressure water output. Built on AR’s RK Series industrial pump architecture with front-access piston packing and valve assemblies for simplified field maintenance, the RKV4G36D-F24C2 is sized for continuous or frequent-duty use in fleet washing, construction equipment cleanup, industrial maintenance, agricultural operations, and contractor-built rigs where uptime and consistent output are non-negotiable.

Built by Annovi Reverberi in Modena, Italy — with US-based operations, a domestic parts distribution network, and dedicated AR North America technical support — the RKV4G36D-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 RKV4G36D-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 RKV4G36D-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
• 4G36 — Performance rating: 4.0 GPM flow rate at 3,600 PSI maximum operating pressure — 14,400 cleaning units. The “36” segment follows the AR model code convention established across the RKV series where “37” = 3,700 PSI and “40” = 4,000 PSI.
• 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 3,600 PSI the C2 operates within its rated ceiling with 50 PSI of headroom — the narrowest margin in this library but technically within the Gymatic 3/B’s rated envelope.
• No trailing I suffix — the model terminates at C2, confirming straight 3,600 PSI water output without an integrated downstream chemical injector

Key Specifications

RKV4G36D-F24C2 Technical Details at a Glance

• Flow Rate: 4.0 GPM (gallons per minute)
• Maximum Pressure: 3,600 PSI
• Cleaning Units: 14,400 (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 — heavy-duty construction for continuous commercial duty operation
• Manifold Material: Forged brass — dense, pore-free construction for corrosion resistance and sustained 3,600 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 / 3,600 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
• 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 RKV4G36D-F24C2 Assembly Ready for Installation

• Factory-installed Gymatic unloader (C2) — pre-mounted and calibrated; no downstream injector port on this RKV4G36D-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 RKV4G36D-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 RKV4G36D-F24C2 component
• Factory test certification — every RKV4G36D-F24C2 load-tested at 50%, 100%, and 150% of rated output before leaving the AR manufacturing facility

The Gymatic Unloader — Pressure Control at 3,600 PSI

Near-Rated Operation. Set It. Lock It. External Chemical Control.

The Gymatic (C2) unloader on the RKV4G36D-F24C2 is rated to 3,650 PSI — operating with 50 PSI of headroom at the pump’s 3,600 PSI output. This near-ceiling pairing places the Gymatic 3/B in a well-defined operating zone:

• Within rated envelope — the C2 Gymatic at 3,600 PSI operates below its 3,650 PSI rated ceiling, maintaining reliable bypass regulation and overpressure protection throughout the RKV4G36D-F24C2’s operating range
• Adjustable then tamper-resistant — operating pressure set on-site and locked before production operation, maintained consistently across every operator and every job cycle on the RKV4G36D-F24C2 without re-adjustment or drift
• Smooth internal bypass at 4.0 GPM — trigger-off bypass smoothly redirects the full 4.0 GPM flow at 3,600 PSI, preventing deadhead pressure spikes during idle intervals on production wash jobs
• Flexible pressure range — C2 unloader adjustment on the RKV4G36D-F24C2 supports everything from lighter rinsing to full 3,600 PSI aggressive washdown, matching system pressure to different nozzles, surfaces, and cleaning tasks
• No downstream injector port — the RKV4G36D-F24C2 delivers straight 3,600 PSI water output. Chemical delivery managed externally through a dedicated downstream injector, soft wash proportioner, or separate chemical system.
• Overpressure protection — the C2 unloader protects hoses, spray guns, and downstream accessories from over-pressurization at trigger release throughout the RKV4G36D-F24C2’s operating range
• Engine load reduction in bypass — reduced back-pressure lowers engine load and fuel consumption during trigger-off idle intervals on full-day wash operations

RK Series Construction — Built for 3,600 PSI High-Volume Commercial Duty

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

• Solid ceramic plungers in the RKV4G36D-F24C2 resist abrasion, thermal shock, and chemical attack at 3,600 PSI across extended commercial operating hours. Individual replacement when service limits are reached — no full pump replacement required.
• Bronze connecting rods provide high strength and fatigue resistance under the continuous load cycling of 4.0 GPM / 3,600 PSI operation at 3,400 RPM, distributing force evenly across the crankshaft and extending connecting rod service life compared to aluminum alternatives
• Reinforced crankcase handles the stresses of daily professional use at 3,600 PSI, maintaining crankshaft and bearing alignment under vibration and thermal expansion cycles during continuous duty operation
• Forged brass manifold provides a dense, pore-free pressure vessel for sustained 3,600 PSI cycling and corrosion resistance in commercial cleaning environments where water quality and chemical exposure vary
• Stainless steel valves maintain precise seating geometry through high-cycle 3,600 PSI / 4.0 GPM operation, resisting calcium scale and pitting that cause pressure loss over time
• Triplex three-plunger design produces smooth, overlapping pressure pulses that reduce pulsation-induced fatigue stress on hoses, spray guns, surface cleaners, and fittings connected to the RKV4G36D-F24C2

Front-Access Serviceability — RK Series Maintenance Advantage

Packing and Valve Service Without Full Disassembly

• Front-access piston packings — packing replacement on the RKV4G36D-F24C2 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 RKV4G36D-F24C2 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 RKV4G36D-F24C2 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 in the horsepower class appropriate for 4.0 GPM / 3,600 PSI loads on the RKV4G36D-F24C2. Verify engine horsepower 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 RKV4G36D-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 footprint — direct coupling is ideal for trailer rigs, skid frames, and OEM platforms with limited installation space
• Secure keyed shaft connection — ensures positive torque transfer and stable operation at full load on the RKV4G36D-F24C2
• Included mounting hardware — bolts and fasteners sized for the F24 SAE J609A bolt pattern are supplied in the box

Typical Applications

Where the RKV4G36D-F24C2 Delivers Best Results

• Fleet washing with external chemical systems — trucks, trailers, buses, and service vehicles where 4.0 GPM coverage speed and 3,600 PSI cleaning force handle heavy road film and grease at high throughput with chemical applied through a dedicated external system
• Industrial equipment cleaning — heavy machinery, construction equipment, and manufacturing plant surfaces where the RKV4G36D-F24C2’s 3,600 PSI removes caked contamination and chemical delivery is managed externally
• Concrete and hard surface maintenance — sidewalks, driveways, parking lots, garages, and warehouses where 14,400 CU high-volume output at 3,600 PSI provides productive commercial cleaning results
• Agricultural operations — tractors, harvesters, implements, and farm infrastructure maintenance on gas or diesel engine-powered rigs where maximum volume at elevated pressure handles large surface areas
• Soft wash system rinse supply — the RKV4G36D-F24C2 provides clean 3,600 PSI / 4.0 GPM rinse water while a dedicated soft wash proportioner manages chemical delivery independently
• Commercial property maintenance — storefronts, plazas, building exteriors, and work areas where high-volume professional cleaning output with external chemical management is the operational standard
• Contractor rigs and OEM system builds — trailer and skid-mounted systems where the RKV4G36D-F24C2’s compact F24 direct-drive footprint, front-access serviceability, and clean water architecture support efficient new builds and professional replacement projects

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

High-Output RK Series Performance Backed by Domestic Support

The RKV4G36D-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 RKV4G36D-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, and proper winterization using RV-grade environmentally safe antifreeze — the RKV4G36D-F24C2 is engineered for 10 or more years of productive commercial service life. AR North America’s domestic parts depth ensures rebuild kits, plunger sets, packing kits, and Gymatic unloader service components for the RKV4G36D-F24C2 are typically available same-week.

Contractors, rental fleet operators, municipal purchasing departments, resellers, and volume buyers are invited to contact wholesale@wshpwr.com for wholesale and special pricing on the RKV4G36D-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.

14,400 Cleaning Units. 3,600 PSI. 4.0 GPM. RK Series. Gymatic Bypass. No Injector.

Italian Engineering. High-Volume Clean Water Platform. Front-Access Service. US Warranty Coverage.

For contractors, fleet operators, industrial maintenance teams, and OEM rig builders who need 4.0 GPM high-volume output at 3,600 PSI — with Gymatic bypass pressure regulation operating within its rated envelope, straight water output for external chemical management, RK Series reinforced crankcase with front-access piston packing and valve serviceability, and bronze connecting rods — the RKV4G36D-F24C2 delivers a factory-tested, fully documented, and completely rebuildable assembly from one of the global pressure pump industry’s most trusted manufacturers. Fourteen thousand four 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.