AR Minimatic 4/B Pressure Unloader Valve | AR Pump Unloader

AR Minimatic 4/B Pressure Unloader Valve

The AR Minimatic 4/B pressure unloader is a compact, reliable bypass valve engineered specifically for AR RC, XT, and XM series pumps. When the trigger gun closes, this unloader smoothly redirects flow to protect your pump from damaging pressure spikes — extending seal life and keeping your equipment running longer between service intervals.

Specifications

• Compatible with AR RC, XT & XM pump series
• 1/2" FPT inlet / 3/8" MPT outlet
• Maximum pressure: 2,600 PSI
• Maximum temperature: 160°F

Available Models

• AR21039 — With injector | 2–3 GPM
• AR21040 — With injector | 3–4 GPM
• AR20821 — No injector | 3–5 GPM

Repair Parts Available

• Kit 7500 — Bolt & O-ring kit
• Kit 2858 — Full repair kit

Keep a repair kit on hand and you’ll never lose a day of work to a failed unloader. Built for professionals who depend on AR pumps day in and day out.