Dosatron LoFlo Series Nutrient Delivery System Unit for Low Doses
Some products go into the water at very small rates, and a doser that cannot hold a low setting wastes concentrate on every gallon. This unit is a Dosatron D14MZ3000, part number D14MZ3000VFBPIIK, built for the 3/4 inch LoFlo Nutrient Delivery System. Water pressure alone drives it, so there is no wiring and no pump control to set up. Incoming water moves a hydraulic piston up and down inside the body. On the upstroke it draws concentrate from the drum, and on the downstroke it pushes that dose into the mixing chamber. Because the dose is tied to the volume of water passing through, the ratio holds as flow and pressure change. The injection range runs from 1:3000 to 1:333, which is 0.03 to 0.3%. On the custom scale that reads as 1.25 to 11 mL per gallon, or 0.25 to 2.2 teaspoons. Flow can sit anywhere from 0.05 to 14 GPM, at 4.3 to 85 PSI. Connections are 3/4 inch NPT, and the unit measures 21 x 6 5/16 inches and weighs 6 lb. The K suffix marks a Kalrez seal package, chosen for aggressive chemistry such as peroxyacetic acid. A bypass lets you stop injection while water keeps flowing. The box includes a mounting bracket, suction hose, bypass, union, weighted strainer and quick start guide.
Running a Water Powered Doser on a LoFlo Panel
In an NDS layout, each doser handles one product, and this one suits the low-rate end of a feed program. Peroxide-based line cleaners, PAA sanitizers and concentrated micronutrients all live in that range. Mount the panel four to five feet off the floor, with the drum directly below. The doser inlet and outlet should never sit below the top of the concentrate drum. Set the dial by turning it to the mark for the rate you want. When priming, start at the highest setting to pull concentrate up the suction tube faster. Then drop to the working rate and check the output at the test port with a meter. The clicking sound while it runs is normal and means the piston is cycling. Use the bypass to pause one product without shutting down the whole line. Seals wear with use, and lower-than-expected injection is usually the first sign. Plan on a seal kit once a year, or sooner on heavy duty cycles. This unit cannot reach the higher rates of a base nutrient doser, so heavy feeds need a different ratio model.
Key Features
- Water-Powered Injection: A hydraulic piston driven by line pressure doses with no electricity or controls.
- Low-Rate Range: Meters 1:3000 to 1:333, or 1.25 to 11 mL per gallon on the custom scale.
- Kalrez Seals: A seal package suited to aggressive chemistry such as peroxyacetic acid.
- Built-In Bypass: Stops injection on this unit while water keeps flowing to the rest of the line.
- Proportional Dosing: The ratio tracks water volume, so it holds as flow and pressure shift.
- Ready for the NDS: 3/4 inch NPT connections with a union and bracket for the LoFlo panel.
Technical Specifications
| Specification | Value |
|---|---|
| Model | D14MZ3000VFBPIIK |
| Brand | Dosatron |
| Flow range | 0.05–14 GPM (0.19–50 LPM) |
| Operating pressure | 4.3–85 PSI |
| Injection ratio | 1:3000 to 1:333 (0.03–0.3%) |
| Dose scale | 1.25–11 mL/gal (0.25–2.2 tsp/gal) |
| Ounces per gallon | 0.0425–0.384 |
| Connections | 3/4 in NPT |
| Seals | Kalrez |
| Bypass | Yes |
| Dimensions | 21 x 6 5/16 in |
| Weight | 6 lb |
| Included | Mounting bracket, suction hose, bypass, union, weighted strainer, quick start guide |
| Maintenance | Seal kit replacement once a year |