Dosatron D20S

Dosatron D20S Water-Powered Proportional Injector, 5-100 GPM – D20SVFII

The Dosatron D20SVFII (D20S) is a large-format water-powered proportional injector designed for high-flow commercial and industrial fertigation applications. With a flow range of 5 to 100 GPM and a 2-inch NPT connection, the D20S is sized for facilities where the D14 series (14 GPM max) or the D40MZ series (40 GPM max) would restrict water throughput.

The D20S operates on the same water-powered proportional dosing principle as all Dosatron injectors — water pressure drives the piston that draws concentrate from a container and blends it with the water supply at a fixed ratio. The dilution range of 1:500 to 1:50 (0.2% to 2%) covers standard nutrient application rates for high-volume irrigation. The unit includes mounting bracket, manual bypass, suction hose with strainer and weight, vacuum breaker, and a set of legs for freestanding installation. Weight is 47 lbs.

Key Features & Benefits

• 5-100 GPM Flow Range — Handles high-flow commercial and industrial applications where smaller Dosatron units would be a restriction.
• 2-Inch NPT Connections — Large-bore connections for high-flow plumbing systems.
• 1:500 to 1:50 Dilution Range — 0.2% to 2% concentration — appropriate for most liquid nutrient programs.
• 2-120 PSI Operating Pressure — Wide pressure range for compatibility with various supply configurations.
• Legs Included — Optional freestanding legs allow installation without a wall-mounting structure.
• Vacuum Breaker Included — Prevents backflow from the suction line into the concentrate container in vacuum conditions.
• Water-Powered — No electricity required — operates from incoming water supply pressure.

Who Should Use This Injector

The D20SVFII is for large commercial facilities where irrigation demand exceeds what the 40 GPM D40MZ series can supply — nurseries, greenhouses, large indoor facilities, and municipal irrigation installations. It is also appropriate for situations where a single high-capacity injector is preferred over installing multiple lower-flow units in parallel.

When to Use the D20S vs. Multiple D40MZ Units in Parallel

Dosatron D40MZ injectors can be installed in parallel to increase total system flow capacity — two D40MZ units in parallel can handle up to 80 GPM, and three up to 120 GPM. The D20SVFII provides up to 100 GPM from a single unit, simplifying installation when a single injector is preferred over a parallel array. A parallel D40MZ installation requires a flow-balancing manifold to ensure each injector receives equal flow and doses correctly. A single D20S eliminates this complication at flow rates up to 100 GPM. For flow requirements above 100 GPM, parallel D20S units or a custom manifold design may be needed.

Frequently Asked Questions

What is the flow range of the D20SVFII?

5 to 100 GPM at 2 to 120 PSI.

What connection size does it use?

2-inch NPT.

What is the dilution range?

1:500 to 1:50 (0.2% to 2%).

What is the weight of the D20S?

47 lbs.

What accessories are included?

Mounting bracket, manual bypass, suction hose with strainer and weight, vacuum breaker, and a set of freestanding legs.

Can it be installed without wall mounting?

Yes. The included legs allow freestanding installation.