NEWDOSE Metering Pump Review: Product Lines, Strengths and Where They Fit

"Is a NEWDOSE metering pump any good?" We hear that question more than any other when a quote request comes in. A yes or no doesn't help much. The useful answer comes from laying the product range out on the table and checking which duties it covers well and where you need to be careful.

Who Is Behind the NEWDOSE Brand

The NEWDOSE metering pump brand belongs to a Beijing company founded in 2001 that focuses on precision metering pumps, flow sensors, online water quality instruments and dosing control systems. Besides pumps, the same company makes the ARK range of pH, ORP and conductivity instruments and flow sensors, plus NDM mixers and TANK integrated dosing tanks.

That matters on site. A NEWDOSE metering pump, instrument and tank can come from one supplier, so signals and connections match and commissioning involves less finger-pointing. The TANK comes in 60 L and 120 L sizes. The 120 L tank can carry one or two solenoid pumps and has a multifunction valve on the tank itself, so calibration and draining happen right there without a separate base or valve set.

The company holds ISO9001 certification, and the products carry CE marking.

The Two Main NEWDOSE Metering Pump Lines

Solenoid diaphragm pumps

For small-volume dosing, the solenoid NEWDOSE metering pump is the workhorse. The range splits into four series by control method:

1. DFD: stroke rate set by hand on the front panel;
2. DP: follows an external pulse signal;
3. DM: follows a 0/4–20 mA current signal;
4. DC: RS485 communication to a host system.

Flow runs from 1 L/h to 55 L/h, with pressure up to 20 bar on the DFD-02-20-HX. The classic X models are rated for 2 m suction lift, while the M, HX, NX and GX models list 3 m.

The model code carries the key data. Take DFD-02-07-M-PVT-A: DFD is manual control, 02 means 2 L/h, 07 means 7 bar, M is the frame, PVT is a PVC pump head with PTFE diaphragm and valve seats, and A is a 230 V supply. Once you can read that string, checking a quote against your inquiry takes a minute.

Mechanical diaphragm pumps

When flow climbs further, the mechanical diaphragm NEWDOSE metering pump range takes over. NDJ, NDWS and NDWL handle small to medium flows, while ND1000 and ND2000 cover a few hundred up to two thousand liters per hour. The largest single unit is the ND2000-2000/0.3 at 2000 L/h and 3 bar. Beyond that you run two or more pumps in parallel or ask the factory for a solution. For pressure duties there is the HND series, rated up to 30 bar, which can replace some low-pressure hydraulic diaphragm pumps.

There are also the ECODOSE E series and the stepper-motor Evodose series. Treat them as add-ons aimed at budget projects and fine adjustment at low flow.

Which NEWDOSE Metering Pump Strengths Actually Help

A caveat first: the points below come from factory literature. How they play out depends on your duty.

• PTFE diaphragm: solenoid pumps use a solid PTFE diaphragm with a five-year free warranty on the diaphragm. The whole pump carries a one-year warranty.
• Short dry running is tolerated: if the tank runs empty and the pump keeps stroking for a while, the diaphragm usually survives. Long dry running heats the solenoid, so fit a level switch anyway.
• Common valve sizes: check valves across the solenoid range share one size, so you stock fewer spares.
• Mechanical pump options: stroke length can be changed while running, and most models can take a 4–20 mA electric stroke actuator, a variable-frequency motor or an explosion-proof motor.

Where a NEWDOSE Metering Pump Makes Sense

The factory lists a wide spread of industries: wastewater, pure water production, drinking water, petrochemical, food and beverage, power, metallurgy, pharmaceutical, paper and textile dyeing. On real jobs, we usually sort it like this:

• Small continuous doses of sodium hypochlorite, PAC or antiscalant go to a solenoid NEWDOSE metering pump. If it follows an instrument signal, pick DM or DP.
• Antiscalant or reducing agent in a pure water system is often a tiny dose, so a 1–3 L/h solenoid model is enough. Oversize it and you lose fine control.
• Coagulant or acid/alkali neutralization at tens to two thousand liters per hour calls for a mechanical diaphragm pump. Above 2000 L/h, plan several in parallel.
• Boiler duties or injection points between 12 and 30 bar are worth checking against the HND first, since it avoids the oil circuit of a hydraulic pump.

What to Sort Out Before You Buy

Whether a NEWDOSE metering pump works well for you depends heavily on how complete your selection data is. A solenoid pump's actual output shifts with back pressure, and the manual says so plainly, so accurate dosing needs calibration on site. On mechanical pumps, if the pressure difference between suction and discharge is under 1 bar, fit a back-pressure valve. Without it the pump can siphon and the flow wanders.

A classic trap: low liquid level in the tank, pump mounted high, suction lift exceeded, nothing comes up. The X models only manage 2 m, so measure the height difference if the pump sits above the tank.

Calibration is simple. Put the suction line into a graduated container, purge air from the pump head, note the level, run the pump for at least 5 minutes, and work out the hourly flow from the drop. Then back-calculate the stroke rate you need. With any NEWDOSE metering pump, ten minutes spent calibrating after installation often does more good than a week spent comparing brands.

Conclusion

So, is a NEWDOSE metering pump worth considering? Its strength is breadth. Solenoid pumps start at 1 L/h, a single mechanical pump reaches 2000 L/h, the HND covers high pressure, and instruments and tanks come from the same source. Control options cover manual, pulse, current and RS485. Whether you end up with the right pump depends on four inputs: flow, pressure, chemical and installation height. Get those clear, check them against the model table, and the choice is rarely wrong.

FAQ

Are NEWDOSE and ECODOSE the same company?

Yes. The ECODOSE E series is a mechanical diaphragm pump line that appears as its own series in the NEWDOSE catalog, positioned as the budget option.

What is the highest pressure on a solenoid NEWDOSE metering pump?

The DFD-02-20-HX tops the list at 2 L/h and 20 bar. Higher pressure comes with lower flow, so check the exact row for the model you want.

The diaphragm has a five-year warranty. Does the whole pump?

No. The five-year free warranty covers the PTFE diaphragm. The manual gives the complete pump a one-year warranty, and damage from misuse is excluded.

Can a NEWDOSE metering pump be tied into a PLC?

Yes. DM takes 4–20 mA, DP takes pulses and DC uses RS485. Mechanical pumps can be fitted with an electric stroke actuator that reads a 4–20 mA signal and adjusts stroke automatically.

Can the pump be installed outdoors in winter?

The manual asks for an ambient temperature of 0–40 ℃ and no direct sunlight. In cold regions, put the pump in an insulated enclosure and protect the chemical from freezing too.

If you want to know which model fits your job, send us the chemical, flow and line pressure through our contact page and we'll check it with you.