PUMP SPOTLIGHT: RK SERIES 228
RK- TRIPLEX PLUNGER PUMPS
The Annovi Reverberi RK Series 228 is a commercial‑grade line of triplex plunger pumps engineered for high‑pressure cleaning systems and professional‑duty environments. Built for durability, compact integration, and consistent hydraulic performance, the RK Series is widely used in pressure washing equipment, industrial cleaning systems, and commercial washdown applications. If you're searching for Annovi Reverberi RK Series 228 Triplex Pumps, you'll find this model series offers exceptional reliability and efficiency for demanding tasks.
With multiple configurations designed for 1750 RPM operation, the RK Series offers exceptional flexibility for both gas engine and electric motor platforms, making it a trusted choice among OEMs, service technicians, and equipment builders across North America.
WHY CHOOSE THE ANNOVI REVERBERI RK PUMP?
The RK Series is recognized for its blend of reliability, performance, and long‑term service capability. Designed to withstand demanding commercial usage, it incorporates proven AR technologies and materials to deliver consistent output with minimal maintenance. Key advantages include:
Nickel‑Plated or Forged Brass Head: Built for strength and corrosion resistance, the RK pump head provides long‑term reliability in harsh operating conditions.
Solid Ceramic Plungers & Bronze/Aluminum Connecting Rods: These components minimize wear, reduce friction, and enhance efficiency—supporting long service life under high‑pressure loads.
Compact Horizontal Design: With a lightweight, efficient layout and 24mm shaft options, RK Series pumps are easy to integrate into commercial pressure washing systems and professional cleaning platforms.
TECHNICAL FEATURES & SPECIFICATIONS
The RK Series pumps are manufactured for industrial‑grade performance, reliability, and serviceability. Each model is built around a shared design optimized for sustained high‑pressure output:
- Pump Type: Triplex plunger pump
- Head Material: Nickel‑plated brass or forged brass (strong and corrosion‑resistant)]
- Plungers: One‑piece solid ceramic (high durability and thermal shock resistance)
- Valves: Stainless steel valve assemblies
- Crankcase: Die‑cast aluminum with oil bath lubrication and cooling fins for heat dissipation
- Bearings: Oversized friction bearings for smooth, long‑life operation
- Connecting Rods: Aluminum or bronze alloy (oversized for strength)
- Seals: High‑pressure Buna‑N sealing system
- Shaft Orientation: Horizontal, 24mm solid or hollow shaft (model dependent)
- Oil Capacity: 15 oz
- Max Temperature: 140°F
- Ports: ½" F inlet / ⅜" F outlet (most RKA models)
PERFORMANCE RANGE – RK Series (Example Model: RKA4G40HN)
- Pump Type: Triplex plunger pump
- Max Pressure: 275 bar / 4000 PSI
- Flow Rate: 15.1 L/min / 4.0 GPM
- RPM: 1750
- Power (EBHP): 11
- Weight: 20 lbs.
APPLICATIONS
This compact yet powerful design makes the RKA4G40HN one of the most widely used and referenced pumps in the RK Series lineup.
- Commercial Pressure Washing
- Industrial Cleaning Systems
- Fleet Maintenance Programs
- Car Wash Installations
- Agricultural & Equipment Washdown
RK Series – 1750 RPM (RKA Models, 24mm Solid or Hollow Shaft)
| Model | Flow Rate (GPM) | Max Pressure (PSI) | Power (HP) | RPM | Weight |
|---|---|---|---|---|---|
| RKA4G30N | 4.0 | 3000 | 8.2 | 1750 | 19 lbs |
| RKA4G30E‑F17 | 4.0 | 3000 | 8.2 | 1750 | 21 lbs |
| RKA4G30AN | 4.0 | 3000 | 8.2 | 1750 | 19 lbs |
| RKA3.5G30HN | 3.5 | 3000 | 7.5 | 1750 | 20 lbs |
| RKA3.5G40HN | 3.5 | 4000 | 9.6 | 1750 | 20 lbs |
| RKA4G35NL‑2 | 4.0 | 3500 | 9.6 | 1750 | 20 lbs |
| RKA45G30HN | 4.5 | 3000 | 7.5 | 1750 | 20 lbs |
| RKA45G40HN | 4.5 | 4000 | 9.2 | 1750 | 20 lbs |
| RKA4G40HN | 4.0 | 4000 | 11.0 | 1750 | 20 lbs |
| RKA4G40HNL | 4.0 | 4000 | 11.0 | 1750 | 20 lbs |
| RKA4G40HN‑SX | 4.0 | 4000 | 11.0 | 1750 | 20 lbs |
| RKA55G30HN | 5.5 | 3000 | 11.3 | 1750 | 20 lbs |
| RKA65G20HN | 6.6 | 2000 | 9.0 | 1750 | 20 lbs |
| RKA7G20HN | 7.1 | 2000 | 10.0 | 1750 | 20 lbs |
Where It Fits in the AR Range
The RK Series 228 is a central part of Annovi Reverberi’s commercial pump offerings—positioned as a versatile, durable solution for mid‑to‑heavy‑duty pressure applications. It delivers:
- Strong performance up to 4000 PSI
- Compact, consistent form factor across the lineup
- Compatibility with gas engines, electric motors, and belt/gear drive systems
- Premium materials including nickel‑plated brass and ceramic plungers
While the RK Series provides excellent commercial capability, the RTX Series remains the next step up for ultra‑heavy‑duty continuous‑use environments. For most commercial rigs, however, the RK Series offers the ideal balance of power, durability, and integration flexibility.
The RKA4G40HN in particular is a proven workhorse widely used in commercial cleaning, mobile wash setups, and industrial equipment maintenance.
READY TO UPGRADE?
The Annovi Reverberi RK Series 228 is more than just a pump—it’s a professional‑grade solution built for reliability, pressure performance, and long‑term value. With its rugged construction, high‑pressure capability, and compact integration, the RK Series delivers commercial‑level performance job after job.
Is the RK Series Right for Your Application?
The Annovi Reverberi RK Series 228 is a precision‑engineered pump family designed for professionals who require consistent high‑pressure output in demanding working environments. With nickel‑plated brass heads, ceramic plungers, and robust internal components, RK models like the RKA4G40HN provide dependable performance with minimal maintenance.
Whether you're designing commercial pressure washers, upgrading industrial cleaning systems, or replacing a high‑duty component, the RK Series offers the power, efficiency, and reliability required for professional applications.
Own an RK Pump?
Be sure to explore our repair and maintenance videos on our YouTube channel: https://youtu.be/0GorwSy_Spg
