MV20018 Chemical Injector 1.8 mm | 4060 PSI Fixed Chem

MV20018 Chemical Injector 1.8 mm | 4060 PSI Fixed Chem

Fixed-ratio Venturi injector for consistent chemical delivery

• The AR MV20018 fixed chemical injector is a precision-calibrated detergent injection device
  designed for 2.5–5.5 GPM professional pressure-washing and industrial cleaning systems.
• Uses a 1.8 mm orifice and is rated to 4,060 PSI, providing a balanced Venturi
  effect for reliable suction and even chemical mixing without extra pumps or constant adjustment.
• Delivers consistent, repeatable detergent concentration from job to job, improving cleaning quality and
  controlling chemical consumption.

How It Works

Venturi principle for automatic chemical draw

• High-velocity water accelerates through the injector’s precision orifice, creating a low-pressure zone that
  pulls detergent through the suction barb and check-valve assembly.
• Detergent blends smoothly into the discharge stream downstream of the pump, yielding a homogenous,
  foam-friendly solution.
• Fixed orifice size maintains a constant detergent-to-water ratio despite minor supply pressure fluctuations.

Construction & Performance

Brass body with stainless-steel internals

• Corrosion-resistant brass housing paired with stainless-steel internals for
  long service life with soaps, degreasers, and mildly caustic cleaners.
• Precision-machined internal channels promote smooth flow, minimizing turbulence and pressure drop so tip
  pressure remains effective while drawing chemical.
• 1.8 mm sizing is optimized for ~2.5–5.5 GPM systems, delivering strong suction over longer hose
  runs compared with smaller-orifice injectors.

Installation & Operation

Downstream injector with automatic soap/rinse switching

• Install in the discharge line between the pump outlet and spray wand, or downstream of accessories, using
  standard threaded or quick-connect couplers.
• With a low-pressure nozzle engaged, the injector automatically starts chemical draw; switching
  to a high-pressure tip stops suction for full-pressure rinsing.
• Integrated check valve prevents backflow into the detergent container, protecting solution quality and
  injector internals.

Key Benefits MV20018 Chemical Injector 1.8 mm | 4060 PSI Fixed Chem

Consistent ratios with minimal maintenance

• Fixed-ratio accuracy ensures constant detergent concentration without on-the-fly tuning or calibration drift.
• Strong, stable suction maintains draw performance over long hose runs within the 2.5–5.5 GPM window.
• Low internal turbulence and minimal pressure loss help protect pump performance and maintain cleaning impact.
• Brass-and-stainless construction resists corrosion, scaling, and vibration fatigue in daily professional use.
• Quick post-use water flush keeps the orifice clear; the check valve guards against backflow for longer life.

Typical Applications

Professional wash and industrial cleaning systems

• Fleet depots and logistics yards washing trucks, buses, and trailers.
• Rental and contractor rigs for mobile detailing, soft wash pre-soak, and equipment foam/rinse.
• Agricultural and municipal cleaning of implements, refuse containers, and roll-off bins.
• Industrial maintenance for machinery washdown, building exteriors, and pad cleaning.

Best-Practice Setup

Simple plumbing for reliable chemical draw

• Place the injector downstream of the pump/unloader and upstream of the gun or wand.
• Use a dedicated, debris-free suction line fitted with a chemical-rated filter.
• Select properly sized low-pressure tips for soap application and high-pressure tips
  for rinse mode.
• Keep detergent containers at or below injector height to avoid siphon interruptions.
• After using chemicals, run clean water for 1–2 minutes to purge lines and protect the injector.

MV20018 Chemical Injector 1.8 mm | 4060 PSI Fixed Chem Quick Specs

Technical details at a glance

• Type: Fixed-ratio downstream chemical injector (Venturi style).
• Orifice: 1.8 mm, optimized for approximately 2.5–5.5 GPM systems.
• Maximum pressure: 4,060 PSI.
• Materials: Brass body with stainless-steel spring, valve, and internal components.
• Operation: Automatic soap/rinse via nozzle change with integrated check valve.
• Media: Compatible with water-based detergents and degreasers within rated limits.

Troubleshooting

Common issues and quick checks

• Weak soap draw: confirm low-pressure tip is installed, check for kinks or restrictions in the
  suction line, clean or replace the detergent filter, and verify container level and venting.
• Pulsing or poor mix: inspect for air leaks at suction connections and ensure all fittings are
  tight and properly sealed.
• Residual suction in rinse: verify correct high-pressure tip size and condition, and inspect the
  check valve for debris or damage.

What’s Included & Compatibility

Ready-to-install injector MV20018 for most pro washers

• Supplied as a complete MV20018 fixed chemical injector with integrated check valve.
• Compatible with most professional pressure washers using standard threaded or quick-connect plumbing.
• Pairs effectively with foam lances, brushes, and downstream accessories designed for fixed-ratio injectors.