RKA4G35NLMVR35 Triplex Pump | 4.0 GPM 3500 PSI

RKA4G35NLMVR35 by Annovi Reverberi — Industrial Triplex Plunger Pump with Gymatic VR35 Unloader | 4.0 GPM | 3,500 PSI | Nickel Plated Brass Head | Bronze Connecting Rods | 45mm Extended Solid Shaft | Belt-Drive Compatible | No Chemical Injector

The RKA4G35NLMVR35 by Annovi Reverberi is a professional-grade RKA Series industrial triplex ceramic plunger pump engineered for belt-drive and electric motor-driven commercial and industrial pressure washing systems requiring 4.0 GPM at 3,500 PSI with Gymatic VR35 bypass regulation and straight high-pressure water delivery. Rated at 4.0 GPM and 3,500 PSI at 3,400 RPM, the RKA4G35NLMVR35 delivers 14,000 cleaning units — combining 4.0 GPM high-volume output with 3,500 PSI cutting pressure for machinery washing, concrete cleaning, fleet vehicles, industrial surfaces, and large-area outdoor maintenance — through a nickel plated brass head, 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 RKA4G35NLMVR35 carries the factory-installed Gymatic VR35 unloader — manually adjustable, factory-installed, and matched for this pump’s 4.0 GPM / 3,500 PSI operating point. The VR35 is rated to 4,000 PSI and 5 GPM, providing a comfortable 500 PSI of operating headroom at 3,500 PSI for stable, predictable bypass regulation. No chemical injector — straight 3,500 PSI water output for operators managing chemical delivery through an external downstream system. Built by Annovi Reverberi in Modena, Italy — with US-based operations, a domestic parts distribution network, and dedicated technical support — the RKA4G35NLMVR35 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 RKA4G35NLMVR35 Complete Assembly Advantage

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

Every RKA4G35NLMVR35 ships as a factory-matched, factory-approved, and factory-installed complete pump and unloader assembly:

• Factory-matched VR35 for 3,500 PSI — the Gymatic VR35 is factory-calibrated for this pump’s 4.0 GPM / 3,500 PSI operating point with 500 PSI of operating headroom for stable, confident bypass regulation across continuous industrial 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 RKA4G35NLMVR35 exits the manufacturing facility with the VR35 unloader mounted, calibrated, and tested for flow, pressure, and leak-free operation before shipment.
• Eliminates mismatch returns — the factory-matched assembly eliminates incorrect unloader specification — the most common source of industrial pump system returns — before the pump leaves the box.
• Installation-ready — connect to the power source via belt coupling, connect system hoses, add fuel or power, and start. Ready from day one.

Decoding the RKA4G35NLMVR35 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
• N — Shaft type: Natural / solid shaft — precision-machined solid shaft per Annovi Reverberi model designation convention
• 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
• VR35 — Unloader system: Gymatic VR35 — manually adjustable; rated to 4,000 PSI and 5 GPM; 500 PSI of operating headroom at 3,500 PSI
• No trailing I suffix — confirms straight 3,500 PSI water output without a factory-installed downstream chemical injector

Key Specifications

RKA4G35NLMVR35 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: 3,400 RPM
• Pump Type: RKA Series industrial triplex ceramic plunger pump
• Pump Head: Nickel Plated Brass Head (H designation) — enhanced corrosion resistance and surface hardness on the brass head manifold surfaces
• Shaft Type: Natural solid shaft (N designation)
• Shaft Length: 45mm extended solid shaft (L designation) — v-belt, poly-drive belt, and flexible coupling ready
• Manifold: 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 duty 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 VR35 — manually adjustable; rated 4,000 PSI / 5 GPM; 500 PSI operating headroom; factory-matched and factory-installed
• 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 RKA4G35NLMVR35 Assembly Ready for Installation

• Factory-matched Gymatic VR35 unloader — installed and calibrated for the 4.0 GPM / 3,500 PSI operating point; manually adjustable; no downstream injector port on this variant
• Banjo bolts and sealing O-rings — standard hardware for VR family unloader connections; supplied for secure, leak-resistant installation
• 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
• Operator’s manual — complete installation, startup, operating, and maintenance procedures
• Parts schematic — exploded-view diagram with Annovi Reverberi part numbers for every serviceable component

Gymatic VR35 — 500 PSI Headroom. Manually Adjustable. Clean Water Output.

Factory-Approved. Stable Bypass. No Injector. Maximum Pressure Control.

• 500 PSI of operating headroom at 3,500 PSI — the VR35 on the RKA4G35NLMVR35 operates comfortably below its 4,000 PSI rated ceiling, delivering stable, predictable bypass regulation throughout continuous industrial cleaning cycles
• Manually adjustable pressure control — operators can precisely set operating pressure on the RKA4G35NLMVR35 for different nozzle sizes, surface types, and cleaning tasks. Simple manual adjustment maintains the set point reliably across every operator and every job cycle.
• Extended unloader service intervals — VR35 bypass components operating with 500 PSI of headroom experience reduced cumulative stress across high-cycle industrial environments, extending rebuild intervals compared to ceiling-pressure pairings
• No factory-installed injector — the RKA4G35NLMVR35 delivers straight 3,500 PSI water output. Chemical delivery managed externally through a dedicated downstream injector or soft wash system when soap application is required.
• Smooth pressure transitions — controlled bypass at trigger release protects hoses, guns, and downstream accessories from pressure spikes throughout the RKA4G35NLMVR35 operating range

Nickel Plated Brass Head and Premium Industrial Construction

Corrosion-Resistant. Bronze Rods. Ceramic Plungers. Built for Industrial Belt-Drive Duty.

• Nickel Plated Brass Head — nickel plating on the brass pump head of the RKA4G35NLMVR35 provides enhanced surface hardness and corrosion resistance, making it well suited for humid wash bays, detergent-heavy environments, and industrial cleaning installations where chemical exposure is continuous
• Bronze connecting rods provide strength and longevity under continuous load cycles on the RKA4G35NLMVR35, ensuring smooth power transfer from belt-driven input through extended industrial duty cycles
• Solid ceramic plungers deliver excellent wear resistance and thermal stability, reducing seal wear and extending service intervals in industrial belt-drive applications on the RKA4G35NLMVR35
• Brass manifold resists corrosion and pressure fatigue across continuous 3,500 PSI cycling in professional cleaning environments where detergents and temperature variation are standard conditions

45mm Extended Solid Shaft — Belt-Drive Industrial Installations

• Purpose-built for belt-coupled systems — the L designation on the RKA4G35NLMVR35 confirms the 45mm extended solid shaft, providing the engagement depth required for correct v-belt pulley seating, poly-drive belt alignment, and secure fastener retention under sustained industrial operating loads
• Correct pulley alignment geometry — extended solid shaft length enables precise pulley positioning on the RKA4G35NLMVR35, supporting correct belt tracking and reducing wear from tension misalignment in continuous industrial installations
• Flexible power source compatibility — belt-drive configurations allow engineers and contractors to match the RKA4G35NLMVR35 to the correct pulley ratio for their specific power source, whether gas engine, diesel engine, or electric motor
• Skid-mounted, trailer, and stationary applications — the RKA4G35NLMVR35’s extended solid shaft and 3,400 RPM industrial construction support fixed wash bays, belt-driven trailer systems, and production facility installations

Typical Applications

Where the RKA4G35NLMVR35 Delivers Best Results

• Fleet service and wash bays — the RKA4G35NLMVR35’s 4.0 GPM output and 3,500 PSI cleaning force handle fleet vehicle contamination efficiently in production wash bay environments with chemical applied through an external system
• Industrial maintenance and equipment cleaning — machinery, production equipment, and facility surfaces where the RKA4G35NLMVR35’s nickel plated brass head, bronze rods, and continuous-duty construction minimize unplanned downtime
• Concrete and construction cleaning — 14,000 cleaning units of output handles concrete residue, grime, and construction site contamination across large surface areas
• Agricultural equipment washdowns — tractors, harvesters, and farm facilities where reliable 4.0 GPM output and 3,500 PSI impact handle heavy agricultural contamination on belt-drive-powered cleaning systems
• Professional mobile pressure washing rigs — belt-drive contractor systems where the RKA4G35NLMVR35’s 45mm extended solid shaft, factory-matched VR35, and nickel plated brass head deliver reliable professional-grade performance across varied commercial accounts

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

Industrial RKA Series Performance Backed by Domestic Support

The RKA4G35NLMVR35 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, nickel plated brass head seals and o-rings, Gymatic VR35 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 RKA4G35NLMVR35 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. VR35 — 500 PSI Headroom. Nickel Plated Brass Head. 45mm Extended Shaft.

Italian Engineering. 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 belt-drive platform — with a nickel plated brass head for maximum corrosion resistance, bronze connecting rods for continuous industrial duty, a 45mm extended solid shaft for correct v-belt and poly-drive belt pulley engagement, factory-matched Gymatic VR35 with 500 PSI of operating headroom for maximum bypass stability, and straight water output for external chemical management — the RKA4G35NLMVR35 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.