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AR North AmericaSKU: SXW21.350

SXW21.350 Pressure Washer HD Belt Drive AR Industrial Pump 5100 PSI

$859.00

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Overview

The AR SXW21.350 is a heavy-duty belt-drive industrial pressure washer pump rated for 5100 PSI max and 5.55 GPM, running at 1450 RPM. The low 1450 RPM operating speed is what you want a belt-drive pump for — the pump turns far slower than the engine, which cuts heat and wear on long workdays. It mounts on a 24mm shaft and plumbs with a 1/2-inch inlet and 3/8-inch outlet. This is a pump for contractors building or repowering high-pressure belt-drive machines, not a bolt-on for direct-drive units. One non-negotiable from AR: run it with a primary pressure regulator (unloader) plus a secondary safety relief device such as a pop-off valve.

What's included

  • 5100 PSI maximum pressure with 5.55 GPM flow
  • Low-speed 1450 RPM belt-drive operation
  • 24mm shaft
  • 1/2 in inlet port, 3/8 in outlet port
  • AR North America industrial-series pump
  • Requires a primary unloader and a secondary pop-off/safety valve per AR

Specifications

Max PSI
5100 PSI
Max GPM
5.55 GPM
RPM
1450
Drive Type
Belt drive
Shaft Size
24mm
Inlet
1/2 in
Outlet
3/8 in
Brand
AR North America

Frequently asked questions

Yes — AR requires every pump to run with a primary pressure regulating device (an unloader or regulator) plus a secondary safety relief device such as a pop-off valve. Skipping either one risks injury and will damage the pump and system components.

No — the SXW21.350 is a belt-drive pump that runs at 1450 RPM on a 24mm shaft, so it pulleys off the engine rather than bolting to the crankshaft. If your machine is direct-drive, you need a pump built for engine-speed operation instead.

The SXW21.350 has a 1/2-inch input port and a 3/8-inch output port. Plan your inlet feed and high-pressure outlet fittings around those sizes when replacing an existing pump or building a new machine.

Belt drive lets the pump run at a low 1450 RPM instead of engine speed, which reduces heat and wear — the usual choice for a 5100 PSI machine that works long hours. The trade-off is a larger frame and pulley/belt setup on the machine.

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