RK2120N-SX | Left-Hand Triplex Pump, 5.5 GPM 2900 PSI, 24mm Shaft

RK2120N-SX | Left-Hand Triplex Pump, 5.5 GPM 2900 PSI, 24mm Shaft

The RK2120N-SX is a commercial-duty pressure washer pump built for continuous operation in demanding environments. Delivering 5.5 GPM at 2,900 PSI at a low 1450 RPM, it provides high output with cooler, quieter performance to extend component life. Its 24mm left-hand solid keyed shaft makes it ideal for mirrored or dual-pump installations where opposing shaft direction improves belt routing and skid compactness.

With oversized bronze connecting rods, hardened stainless steel plungers, and a forged brass manifold, the RK2120N-SX is engineered for long-term industrial reliability. Field serviceability is enhanced through an oil sight glass, vented dipstick, and factory-installed break-in oil. A 5-year commercial warranty and U.S. service support provide added confidence.

Key Specifications

• Flow Rate: 5.5 GPM
• Pressure Rating: 2,900 PSI
• Operating Speed: 1,450 RPM
• Shaft: 24mm left-hand solid keyed shaft
• Connecting Rods: Oversized bronze
• Plungers: Hardened stainless steel
• Manifold: Precision-forged brass
• Valves: Stainless steel
• Duty Cycle: Continuous industrial use

What’s Included

• Pre-installed break-in oil
• Vented dipstick
• Integrated oil sight glass
• Owner’s manual and schematic
• Performance test documentation
• 5-year commercial warranty

How the Pump Works

The RK2120N-SX uses a triplex plunger system to produce a steady, low-pulsation flow. Three hardened stainless steel plungers operate through precision packings to maintain sealing at full pressure. Oversized bronze connecting rods reduce friction on the crankshaft, especially at the pump’s low 1450 RPM speed. The forged brass manifold maintains alignment under pressure, while stainless valves ensure consistent PSI during continuous operation.

The 24mm left-hand shaft supports mirrored pump configurations and compact belt layouts, making it ideal for dual-pump skids or space-restricted builds.

Benefits

• 5.5 GPM at 2,900 PSI with low heat and wear
• Left-hand 24mm shaft simplifies mirrored installations
• Bronze rods and hardened stainless plungers maximize durability
• Forged brass head maintains stable sealing under load
• Stainless valves ensure consistent pressure
• Easy maintenance with sight glass and vented dipstick
• Factory-tested and covered by a 5-year warranty

Typical Use Cases

• Fleet wash operations
• Industrial surface preparation
• Theme parks and venue washdowns
• Manufacturing plant sanitation
• Fire station and municipal equipment cleaning
• General commercial pressure cleaning

Why Choose the RK2120N-SX

The RK2120N-SX is ideal for builders who need a left-hand shaft orientation and industrial-duty reliability. Its low-speed geometry, bronze rods, stainless plungers, and forged manifold deliver long service life under demanding daily use. With factory testing, included break-in oil, and a 5-year warranty, it installs cleanly and keeps maintenance predictable.

Left-Hand Triplex Pump, 5.5 GPM 2900 PSI, 24mm Shaft

Upgrade your system with the RK2120N-SX Left-Hand Shaft Pump and benefit from 5.5 GPM at 2,900 PSI, mirrored-install flexibility, and long-term durability. Built for continuous duty, it provides the performance and value required for modern industrial cleaning rigs.