RKA4G35NL-C2 Triplex Pump | 4.0 GPM 3500 PSI

RKA4G35NL-C2 by Annovi Reverberi — Industrial Triplex Plunger Pump with Gymatic C2 Unloader | 4.0 GPM | 3,500 PSI | Bronze Connecting Rods | Brass Manifold | 45mm Extended Solid Shaft | Belt-Drive Compatible | No Chemical Injector

The RKA4G35NL-C2 by Annovi Reverberi is a commercial-duty RKA Series industrial triplex ceramic plunger pump engineered for belt-drive and electric motor-driven pressure washing systems requiring 4.0 GPM at 3,500 PSI with factory-matched Gymatic C2 bypass pressure regulation and straight high-pressure water delivery. Rated at 4.0 GPM and 3,500 PSI at 1,450–1,750 RPM, the RKA4G35NL-C2 delivers 14,000 cleaning units — combining 4.0 GPM high-volume output with 3,500 PSI cutting pressure for fleet vehicles, industrial surfaces, construction and mining equipment, agricultural machinery, and commercial wash bays — through bronze connecting rods, solid ceramic plungers, brass manifold, and a 45mm extended solid shaft purpose-built for v-belt pulley, poly-drive belt, and flexible coupling installations.

The RKA4G35NL-C2 delivers straight 3,500 PSI water output with adjustable Gymatic C2 pressure control — correct for operators managing chemical delivery through an external downstream system. Operating at 1,450–1,750 RPM on a belt-drive platform, this pump runs cooler and with reduced internal stress compared to high-speed direct-drive alternatives, extending plunger, seal, and bearing service intervals in continuous industrial duty environments. Built by Annovi Reverberi in Modena, Italy — with US-based operations, a domestic parts distribution network, and dedicated technical support — the RKA4G35NL-C2 arrives pre-filled with factory break-in oil, factory-tested, and ready for installation. Protected by a 5-year US limited warranty and built to be fully rebuilt rather than replaced, this pump is a long-term industrial investment capable of a decade of productive service life.

Factory-Matched and Approved — The RKA4G35NL-C2 Complete Assembly Advantage

No Mismatches. No Guesswork. No Warranty Risk. Just Install and Run.

Every RKA4G35NL-C2 ships as a factory-matched, factory-approved, and factory-installed complete pump and unloader assembly:

• Factory-matched C2 for 3,500 PSI — the Gymatic C2 adjustable unloader is factory-calibrated for this pump’s 4.0 GPM / 3,500 PSI operating point, ensuring predictable pressure behavior and stable bypass response across industrial belt-drive duty cycles.
• Factory-approved configuration — the complete assembly is Annovi Reverberi’s validated specification for this model. Operating with the factory-installed components maintains full 5-year warranty coverage.
• Factory-installed and tested — every RKA4G35NL-C2 exits the manufacturing facility with the C2 unloader mounted, calibrated, and tested for flow, pressure, and leak-free operation before shipment.
• Eliminates mismatch returns — incorrect unloader specification is the most common source of industrial pump system returns. The factory-matched assembly eliminates this before the pump leaves the box.
• Installation-ready — connect to the power source via belt coupling, connect system hoses using the supplied banjo bolts and O-rings, and start. The RKA4G35NL-C2 arrives engineered, assembled, and ready.

Decoding the RKA4G35NL-C2 Model Number

What Every Segment of This Annovi Reverberi Pump Designation Tells You

• RKA — Pump series: RKA Series industrial triplex plunger pump — Annovi Reverberi’s commercial and industrial belt-drive and electric motor platform
• 4G — Flow rate: 4.0 GPM
• 35 — Maximum pressure: 3,500 PSI — 4.0 × 3,500 = 14,000 cleaning units
• L — Shaft length: 45mm extended solid shaft — purpose-built for v-belt pulley, poly-drive belt, and flexible coupling installations requiring additional engagement depth beyond standard shaft length
• C2 — Unloader code: Gymatic — adjustable bypass unloader; factory-matched and factory-installed as Annovi Reverberi’s approved specification for this model
• No trailing I suffix — confirms straight 3,500 PSI water output without a factory-installed downstream chemical injector

Key Specifications

RKA4G35NL-C2 Technical Details at a Glance

• Flow Rate: 4.0 GPM (gallons per minute)
• Maximum Pressure: 3,500 PSI
• Cleaning Units: 14,000 (GPM × PSI)
• Operating Speed: 1,450–1,750 RPM — low-speed belt-drive platform for reduced heat, friction, and internal component stress
• Pump Type: RKA Series industrial triplex ceramic plunger pump
• Shaft Length: 45mm extended solid shaft (L designation) — v-belt, poly-drive belt, and flexible coupling ready
• Manifold Material: Brass — corrosion-resistant construction for sustained 3,500 PSI cycle integrity
• Plungers: Solid ceramic — exceptional wear resistance and thermal stability
• Connecting Rods: Bronze — strength and longevity under continuous industrial belt-drive load cycles
• Serviceability: Oil sight glass and vented dipstick for simplified routine maintenance
• Lubrication: Oil-bath crankcase with factory pre-filled break-in oil
• Unloader System: Gymatic C2 — adjustable bypass; factory-matched and factory-installed as Annovi Reverberi’s approved specification for this model
• Connections: Banjo bolts and sealing O-rings — standard C2 family hardware supplied for secure, leak-resistant installation
• Chemical Injector: Not included — straight 3,500 PSI water output; chemical delivery managed externally
• Warranty: 5-year limited warranty — US-based coverage through Annovi Reverberi North America

What’s Included in the Box

A Complete, Factory-Configured RKA4G35NL-C2 Assembly Ready for Installation

• Factory-matched Gymatic C2 adjustable unloader — installed and calibrated for the 4.0 GPM / 3,500 PSI operating point; no downstream injector port on this variant
• Banjo bolts and sealing O-rings — standard C2 family hardware for secure, leak-resistant unloader connections
• Factory break-in oil — crankcase pre-filled to the correct operating level for first startup
• Oil sight glass and vented dipstick — at-a-glance oil level monitoring and simplified oil changes
• Mounting hardware and bolts — for installation on compatible belt-drive systems
• Operator’s manual — complete installation, startup, operating, and maintenance procedures
• Parts schematic — exploded-view diagram with Annovi Reverberi part numbers for every serviceable component

Low-RPM Belt-Drive Performance — Built for Industrial Continuous Duty

1,450–1,750 RPM. Cooler Operation. Reduced Wear. Extended Service Intervals.

• 1,450–1,750 RPM operating range — the RKA4G35NL-C2 runs at significantly lower speed than high-speed direct-drive alternatives, reducing internal friction, heat generation, and stress on plungers, seals, and bearings across continuous industrial cleaning cycles
• Extended plunger and seal life — lower reciprocating speed on the RKA4G35NL-C2 reduces cumulative wear on ceramic plungers and piston packings, extending service intervals and reducing maintenance cost per operating hour in high-cycle industrial environments
• Ideal for systems requiring speed reduction — belt-drive configurations allow facility engineers and contractors to use the correct pulley ratio to match the RKA4G35NL-C2’s optimal 1,450–1,750 RPM operating range from a higher-speed engine or motor input
• 45mm extended solid shaft for correct pulley engagement — provides the engagement depth required for proper v-belt pulley seating, poly-drive belt alignment, and secure fastener retention under sustained industrial operating loads on the RKA4G35NL-C2

Gymatic C2 Unloader — Adjustable Bypass at 3,500 PSI

Factory-Approved. Precise Pressure Control. Clean Water Output.

• Adjustable pressure control — the C2 unloader on the RKA4G35NL-C2 allows operators to precisely set operating pressure for different nozzle sizes, surface types, and cleaning tasks, ensuring smooth operation and enhanced safety across industrial cleaning environments
• Smooth bypass transitions — controlled bypass at trigger release protects hoses, guns, and downstream accessories from pressure spikes throughout the RKA4G35NL-C2 operating range
• No factory-installed injector — straight 3,500 PSI water output. Chemical delivery managed externally through a dedicated downstream injector or soft wash system when soap application is required.
• Compact factory-integrated assembly — pre-installed unloader with supplied banjo bolts reduces setup time and eliminates guesswork for OEM builders and service replacements on the RKA4G35NL-C2

Typical Applications

Where the RKA4G35NL-C2 Delivers Best Results

• Fleet service and vehicle washing — the RKA4G35NL-C2’s 4.0 GPM output and 3,500 PSI cleaning force handle fleet vehicle contamination efficiently in production wash bay environments
• Industrial wash bays — stationary and semi-portable belt-drive wash systems where the RKA4G35NL-C2’s low-RPM continuous-duty construction and adjustable pressure control support multi-shift production operations
• Agricultural equipment cleaning — tractors, harvesters, and farm facilities where reliable 4.0 GPM output and 3,500 PSI impact handle heavy agricultural contamination on belt-drive-powered rigs
• Construction and mining equipment maintenance — heavy equipment yards where the RKA4G35NL-C2’s 14,000 cleaning units and continuous-duty industrial construction handle maximum contamination loads
• Commercial pressure washing contractors — belt-drive contractor systems where the RKA4G35NL-C2’s 45mm extended solid shaft, factory-matched C2 assembly, and low-RPM efficiency deliver reliable performance across varied commercial accounts

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

Industrial RKA Series Performance Backed by Domestic Support

The RKA4G35NL-C2 is protected by Annovi Reverberi’s 5-year limited warranty through the US-based warranty and service network. Every internal wear component — solid ceramic plungers, bronze connecting rods, brass manifold seals and o-rings, Gymatic C2 unloader service parts, piston packing kits, and crankcase bearings — is stocked domestically through authorized distribution channels. Contractors, industrial facility managers, fleet operators, municipal purchasing departments, resellers, and volume buyers are invited to contact the WSHPWR wholesale team for pricing on the RKA4G35NL-C2 and the complete Annovi Reverberi pump and unloader assembly line. WSHPWR maintains one of the most complete Annovi Reverberi inventories available through any US web store — with thousands of products in stock and a continually expanding catalog.

14,000 Cleaning Units. 3,500 PSI. 4.0 GPM. 1,450–1,750 RPM. 45mm Extended Shaft. Factory-Matched C2.

Italian Engineering. Low-Speed Industrial Belt-Drive Platform. Factory-Approved Assembly. US Warranty Coverage.

For contractors, fleet operators, industrial maintenance teams, agricultural operations, and facility managers who need 4.0 GPM at 3,500 PSI on a low-speed belt-drive platform — with a 45mm extended solid shaft for correct v-belt and poly-drive belt pulley engagement, bronze connecting rods and ceramic plungers for continuous industrial duty, factory-matched Gymatic C2 adjustable bypass unloader, and straight water output for external chemical management — the RKA4G35NL-C2 delivers a purpose-engineered, completely rebuildable industrial solution from one of the global pressure pump industry’s most trusted manufacturers. Five years of US warranty. A decade of service life.

Volume buyers can reach the WSHPWR wholesale team directly at wholesale@wshpwr.com to discuss pricing for quantity purchases across the complete Annovi Reverberi lineup.