Dosatron 40 GPM, 1.25 to 7.5mL, Bypass Switch-AFLAS-Union

Dosatron D40MZ3000 40 GPM Water-Powered Injector, AFLAS Seals – D40MZ3000BPAFHY

The Dosatron D40MZ3000BPAFHY is a high-flow water-powered proportional injector for facilities requiring up to 40 GPM of treated water flow. Water-powered Dosatron injectors operate from the pressure of the incoming water line — no electricity is required. The injector draws a precise percentage of concentrate from a container and blends it with the water supply at a fixed ratio, regardless of fluctuations in flow or pressure within the rated range.

The D40MZ3000BPAFHY features AFLAS (tetrafluoropropylene) seal assemblies, which provide enhanced chemical resistance compared to standard Viton seals — AFLAS is the appropriate choice for aggressive chemical environments where Viton compatibility may be a concern. The bypass switch allows the injector to pass water without dosing when needed. The included union simplifies integration into a Nutrient Delivery System by providing a threaded disconnect point that allows the injector to be removed without cutting plumbing.

Key Features & Benefits

• 40 GPM High-Flow Capacity — Handles facility water supply flow rates from 2.2 to 40 GPM.
• AFLAS Seal Assembly — AFLAS seals for enhanced chemical resistance in aggressive nutrient and pH adjuster applications.
• 1:3000 to 1:500 Dilution Range — 0.03% to 0.2% — 1.25 to 7.5 mL per gallon concentrate.
• Bypass Switch — Allows water flow without dosing for flushing or rinsing applications.
• Union Included — Factory-included union for clean integration and easy removal from NDS plumbing.
• 1-1/2-Inch NPT Connections — Connection size for high-flow NDS Hi-Flo systems and large-facility plumbing.
• Water-Powered — No electricity required — operates entirely from incoming water pressure.

Who Should Use This Injector

The D40MZ3000BPAFHY is for high-flow facilities that deliver nutrients in the 1:3000 to 1:500 ratio range — typical for many liquid nutrient concentrates. The AFLAS seal variant is specified when the chemical compatibility of standard Viton seals is a concern with the specific concentrates being used. Confirm chemical compatibility of AFLAS seals with the concentrate before ordering.

AFLAS vs. Viton Seals in Dosatron Injectors

Dosatron injectors are available with multiple seal material options: standard Viton (FKM), AFLAS (TFE/P), and Kalrez. Viton is the most widely used and handles most hydroponic nutrient solutions and pH adjusters. AFLAS provides superior resistance to amines, ketones, and certain steam applications where Viton may swell or degrade. Kalrez offers the broadest chemical compatibility of the three but at a higher cost. The D40MZ3000BPAFHY's AFLAS seals are specified when the concentrate or pH adjuster in use has known incompatibility with Viton. Consult Dosatron's chemical compatibility charts for the specific chemicals used before making a seal selection.

Frequently Asked Questions

What is the dilution range of the D40MZ3000BPAFHY?

1:3000 to 1:500 (0.03% to 0.2%), which equals 1.25 to 7.5 mL of concentrate per gallon of water.

What is the difference between AFLAS and Viton seals?

AFLAS seals offer enhanced chemical resistance compared to Viton for specific chemical classes, including amines and ketones. Viton handles most standard hydroponic nutrients. Choose AFLAS when the specific chemical has known Viton incompatibility.

What does the bypass switch do?

The bypass switch allows water to flow through the injector without drawing concentrate — used for flushing lines or delivering plain water without disassembling the system.

Is electricity required?

No. Dosatron injectors are entirely water-powered — no electrical connection is needed.

What is the connection size?

1-1/2-inch NPT, suitable for Hi-Flo NDS installations and high-flow facility plumbing.