RKA7G20HN 7.0 GPM 2000 PSI | High-Volume Pressure Pump

Annovi Reverberi RKA7G20HN Triplex Plunger Pump — 7.1 GPM / 2,000 PSI, 24mm Solid Shaft

The Annovi Reverberi RKA7G20HN is a compact yet powerful commercial-grade triplex plunger pump engineered for pressure washing systems that demand dependable performance, efficient power transfer, and long-term durability. Built around a 24mm solid shaft (N version), this pump is well suited for both direct-drive and pulley-driven configurations, offering installation flexibility across a wide range of commercial and industrial cleaning equipment.

Designed to operate at a standard 1,750 RPM, the RKA7G20HN delivers up to 7.1 gallons per minute at pressures reaching 2,000 PSI. This balance of flow and pressure makes it an excellent solution for large commercial pressure washers, fleet washing systems, facility maintenance equipment, and industrial washdown applications where steady water volume and consistent output are critical.

Overview

• Commercial triplex plunger pump designed for heavy-duty pressure washer systems.
• Produces up to 7.1 GPM and 2,000 PSI at 1,750 RPM.
• Compact, lightweight design at just 20 lbs for easier integration into portable or space-limited systems.
• 24mm solid shaft allows compatibility with a wide range of motors and pulley-drive setups.

Nickel-Plated Brass Pump Head

At the core of the RKA7G20HN is a nickel-plated brass pump head engineered to withstand demanding operating environments. The nickel plating enhances corrosion resistance while maintaining the structural strength and thermal stability of brass. This construction allows the pump to perform reliably across a broad range of water qualities and operating conditions, making it suitable for commercial and light industrial use.

The pump head design supports consistent pressure delivery while minimizing internal stress on components, contributing to longer service life and reduced maintenance requirements.

Precision Internal Components

The RKA7G20HN is equipped with ceramic plungers that provide excellent resistance to wear, heat, and chemical exposure. Ceramic pistons are a preferred choice in professional-grade pumps due to their smooth surface finish and ability to extend seal life under continuous operation.

These plungers are paired with frictionless bronze connecting rods, which offer superior strength and reduced friction compared to standard materials. Bronze rods help dissipate heat more effectively, improving mechanical efficiency and ensuring stable operation during extended run times.

• Triplex plunger configuration for smooth, balanced pumping action.
• Ceramic pistons for durability and long seal life.
• Bronze connecting rods for reduced friction and improved heat management.
• Buna O-rings for reliable sealing performance.

Optimized for 1,750 RPM Operation

Designed specifically for 1,750 RPM operation, the RKA7G20HN pairs efficiently with standard electric motors and belt-drive systems. Operating at this speed helps reduce vibration and mechanical stress compared to higher-RPM designs, promoting quieter operation and improved longevity of both the pump and power source.

The pump’s performance characteristics make it ideal for belt-driven systems, where controlled speed and torque contribute to smoother operation and reduced wear.

• Maximum flow rate: 7.1 GPM (27 L/min)
• Maximum pressure: 2,000 PSI (138 bar)
• Power requirement: 10 EBHP
• Maximum operating temperature: 140°F

Shaft Configuration and Mounting Flexibility

The 24mm solid shaft in the N (Natural / Neutral) configuration allows for straightforward integration into a wide variety of commercial pressure washer frames and drive assemblies. This shaft size is commonly used in professional belt-drive systems, making the RKA7G20HN a convenient replacement or upgrade option.

• Shaft diameter: 24 mm
• Shaft type: Solid
• Shaft version: N (Natural / Neutral)
• Pump orientation: Horizontal

Oil Capacity and Maintenance

With an oil capacity of 15 oz, the RKA7G20HN is designed for efficient lubrication of internal components while maintaining a compact crankcase footprint. Proper lubrication helps minimize wear, control operating temperatures, and extend service intervals when maintained according to manufacturer recommendations.

• Oil capacity: 15 oz
• Designed for consistent lubrication under continuous-duty operation.

Port Configuration and Hydraulic Design

The pump’s port layout supports efficient plumbing in commercial systems while maintaining optimal flow characteristics. Standard inlet and outlet sizes allow for compatibility with commonly used hoses, fittings, and accessories.

• Inlet port: 1/2″ Female
• Outlet port: 3/8″ Female
• Bore diameter: 22 mm
• Stroke length: 14.6 mm

Specifications at a Glance

• Series: 228 (RKA)
• Pump type: Triplex plunger
• Market: Commercial
• Head material: Nickel-plated brass
• Connecting rods: Bronze
• Maximum RPM: 1,750
• Weight: 20 lbs

Ideal Applications

The Annovi Reverberi RKA7G20HN is an excellent choice for commercial pressure washing systems, fleet and vehicle washing, agricultural equipment cleaning, facility maintenance, and industrial washdown applications. Its compact size, reliable performance, and premium internal components make it especially well suited for contractors and facilities that need consistent results without excessive weight or space requirements.

For operators seeking a durable, efficient, and easy-to-integrate commercial pump, the RKA7G20HN delivers trusted Annovi Reverberi performance in a streamlined, professional-grade package.