ECODOSE Metering Pump Guide: Choosing an E Series Mechanical Diaphragm Pump

Most people first see the ECODOSE name on the last few pages of a NEWDOSE catalog. Then comes the question: is the ECODOSE metering pump made by a different company? It isn't. It's the same manufacturer with a different positioning. Let's get the brand family straight first, then focus on how to choose from the E series.

The Brand Family Behind the ECODOSE Metering Pump

The dosing products from this Beijing manufacturer group roughly like this:

• NEWDOSE: the main brand, with DFD, DP, DM and DC solenoid diaphragm pumps and NDJ, NDWS, NDWL, ND1000, ND2000 and HND mechanical diaphragm pumps;
• ECODOSE: the E series mechanical diaphragm metering pumps, built to be economical and light;
• Evodose: stepper-motor pumps for low flow, with model codes starting EFD;
• ARK: pH, ORP and conductivity instruments and flow sensors that can send control signals to the pumps.

There are also NDM mixers and TANK integrated dosing tanks as accessories. Pump, tank, mixer and instrument for a dosing system can mostly come from this one family.

So when a customer asks which brands NEWDOSE has, what they usually want to know is which series from this manufacturer matches their duty. The ECODOSE metering pump covers low flow, low to medium pressure and a tight budget.

Where the ECODOSE Metering Pump Fits

The E series ECODOSE metering pump is a low-flow mechanical diaphragm design with nine models, 9–150 L/h, 3–10 bar, a 40 W motor across the range and a choice of 220 V or 380 V.

The factory lists five selling points. One-touch start/stop with no control panel needed. An optional multifunction junction box on every model that puts the switch, motor protection and level input in one place. A solid PTFE diaphragm that tolerates dry running, with a five-year diaphragm warranty. A self-locking adjuster for steadier output. And an overall lightweight build.

Put plainly, an ECODOSE metering pump suits jobs where you want one mechanical pump to dose steadily without building a separate control box. Small wastewater stations and equipment makers' standard dosing skids are typical.

Reading ECODOSE E Series Model Numbers

Every ECODOSE metering pump model follows the format E-flow/pressure, with pressure in MPa. The nine models fall into two groups by diaphragm size.

Small frame, 70 mm diaphragm

The E-9/1.0 and E-15/1.0 are both 10 bar with a 2 mm stroke. The difference is speed: 54 strokes per minute for the first, 90 for the second. The E-30/0.7 and E-42/0.7 are 7 bar, and the E-60/0.5 and E-72/0.5 are 5 bar, both running at 180 strokes.

Large frame, 88 mm diaphragm

The E-90/0.3, E-120/0.3 and E-150/0.3 are all 3 bar and raise flow by increasing stroke from 3 mm to 5 mm.

Mounting dimensions follow the same split. E-9 to E-72 share one footprint, E-90 to E-150 another, so check the group before swapping models.

What One-Touch Start and the Junction Box Save

A typical mechanical pump needs at least a small control box with a breaker and motor protection, plus extra wiring if there's a level interlock. An ECODOSE metering pump can take the optional multifunction junction box, which combines switch, motor protection and level input and mounts on the pump. For system integrators, that means one box less and one round of wiring and commissioning less. For users, faults are easier to trace because everything sits at the pump.

If the site already has a PLC panel and needs remote start/stop and alarm reporting, the junction box matters less. Wire the pump into the panel the usual way.

ECODOSE Metering Pump or NEWDOSE NDJ?

The two series overlap a lot. At 150 L/h and 3 bar, both the E-150/0.3 and the NDJS-150/0.3 work. The first has a 40 W motor, the second 60 W.

Our usual split: above 5 bar and above 40 L/h, NDJ gives more options, and both the NDJS-40/1.0 and NDJL-70/1.0 reach 10 bar. If 3–5 bar is enough and you want something light and simple, the E series fits better. For options like explosion-proof motors or electric stroke adjustment, look mostly at the NEWDOSE NDW series and up.

Living With the E Series

The ECODOSE metering pump gearbox is grease-lubricated. Check the grease after the first 2000 operating hours, then every 3000 hours or six months. Never add grease while the pump is running. Replace the oil seal yearly.

The manual is specific about greasing. Set the stroke handle to 50%, pack grease onto the bearing behind the sight window, take your fingers out of the housing, then run the pump for about half a minute to spread it. After a stop of more than a week, set stroke to 0%, run unloaded for a few minutes until the grease warms, then bring the stroke up slowly. Do this especially in winter.

Keep suction lift within 2 m and ambient temperature between -10 and 45 ℃, out of direct sun. If the pressure difference between suction and discharge is under 1 bar, fit a back-pressure valve, or the pump may siphon and dose inaccurately.

Each ECODOSE metering pump ships with 2 m of PVC suction tubing, 1.5 m of PE discharge tubing, an injection valve, a foot valve with strainer and fittings. A back-pressure valve, DN15 rigid pipe adapters and a spare diaphragm are optional.

Conclusion

To answer the brand question: NEWDOSE is the main brand, and the same manufacturer also offers ECODOSE, Evodose and ARK instruments. The ECODOSE metering pump is an economical mechanical diaphragm pump covering 9–150 L/h at 3–10 bar, with a 40 W motor, one-touch start/stop and a PTFE diaphragm. It suits low flow, low to medium pressure and sites that want simple electrics. For higher pressure, explosion protection or electric adjustment, move up to NDJ or NDW.

FAQ

Do ECODOSE and NEWDOSE share after-sales support?

Both come from the same Beijing manufacturer, and the E series is listed in the NEWDOSE catalog. Confirm the service route with the supplier you buy from.

Can an ECODOSE metering pump follow 4–20 mA for automatic flow?

The current literature focuses on manual adjustment and one-touch start/stop and lists no electric stroke actuator for the E series. If you need signal control, look at NDWS and similar series.

The diaphragm has five years of warranty. What about the pump?

The manual gives the complete pump a one-year warranty from delivery. The five-year cover applies to the PTFE diaphragm.

380 V or 220 V?

Match the site supply. Both are available. State it after the model number when ordering instead of rewiring after delivery.

Will dry running damage the pump?

The PTFE diaphragm tolerates short dry running, but running dry for long achieves nothing and lets air into the line. Use the junction box's level function so the pump stops when the tank runs low.

Want to check whether your duty suits the E series or NDJ? Send flow, pressure and power supply through our contact page and we'll compare them with you.