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Dura Meter Flow Meter for Dura-Products Chemical Pump Liquid Dosing Dial Manuals
Quick Answer: A Dura meter flow meter gives actual flow feedback for Dura-Products chemical pump liquid dosing dial systems. The dial only sets stroke length, not real L/h. You need a flow meter with DN4 to DN15 size, PTFE or PFA liner, and 4-20 mA HART output to confirm dosing accuracy. Silver Automation Instruments supplies electromagnetic and Coriolis flow meters for these pumps.
Why a Flow Meter Matters on a Dura-Products Dosing Pump
Dura-Products chemical pumps use a liquid dosing dial to adjust stroke frequency or stroke length. But the dial is a mechanical position indicator. It does not tell you the actual flow in L/h. Backpressure, gas bubbles, viscosity, and check valve wear all change the real dose rate.
Most engineers skip this part on small pumps. In practice we have seen a water treatment operator in Vietnam set a sodium hypochlorite pump dial at 40 percent. The real flow was 12 L/h instead of the expected 20 L/h because of gas binding. A DN10 electromagnetic flow meter from Silver Instruments gave direct L/h on the local display and solved the issue in one afternoon.
Selecting the Right Dura Meter Flow Meter
Match the meter to the chemical and to the pump capacity. For flows from 0.5 L/h to 100 L/h with water based chemicals above 5 µS/cm, choose an electromagnetic flow meter. For aggressive acids and caustics, specify PTFE or PFA liner. For viscous polymers above 20 cP, choose a Coriolis mass flow meter because it measures kg/h and ignores viscosity changes.
Specific parameters for most Dura-Products chemical pump dosing loops are DN4, DN6, DN10, or DN15. Temperature from 0 to 80 degrees C. Pressure up to 10 bar. Output 4-20 mA HART plus pulse. This signal connects to a PLC, a dosing controller, or a flow totalizer.
A paint manufacturer in Southeast Asia uses a Silver Instruments DN8 electromagnetic flow meter on a Dura-Products chemical pump. The fluid is a water based defoamer at 12 cP. Flow range is 5 to 40 L/h. The meter sends 4-20 mA HART to a Siemens PLC. The operator reads total liters per batch on the meter display.
Dura-Products Chemical Pump Liquid Dosing Dial Manuals and Flow Meter Setup
Dura-Products manuals give stroke frequency and stroke length settings. They do not include flow meter calibration factors for each chemical. So you need to set the flow meter range based on the pump maximum flow. For a 50 L/h pump, set the electromagnetic flow meter range to 0 to 100 L/h.
Use the dial manual to set the stroke length. Then record the flow meter reading at 20 percent, 50 percent, and 100 percent stroke. This gives a simple three point verification. Because the flow may not be linear below 20 percent stroke, the dial position is not enough for accurate dosing.
Here is the thing. Manual dial settings drift over time. Diaphragm wear and check valve fouling reduce flow. A flow meter catches this before the process is affected. On many customer sites we have seen operators adjust the dial only after product quality drops.
Recommended Silver Instruments Flow Meter Models
For clean chemicals and
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For viscous or non conductive fluids, use the Silver Instruments Coriolis mass flow meter DN6. It measures mass flow from 0.2 kg/h to 60 kg/h. The model number is SIL-CMF-DN6-HAST-C. It suits polymers, oils, and specialty chemicals. Both models have 4-20 mA HART, pulse, and RS485 Modbus.
If you need a local display and batch total, add the SIL-DISP-LCD option. It is IP66 rated and shows L/h, total liters, and alarm status. We ship to Southeast Asia, Oceania, Latin America, Africa, and the Middle East.
Common Installation Mistakes
Do not install an electromagnetic flow meter on the suction side of a dosing pump. Negative pressure can cause air release and measurement error. Install the meter on the discharge side, 10 pipe diameters downstream of the pump. Keep the pipe full at all times.
Do not use a plastic bodied flow meter on solvents unless the manual allows it. We have seen cracked meter bodies on a customer site in Saudi Arabia. The fluid was a solvent based biocide. A PTFE lined electromagnetic meter solved the material issue.
If the pump pulses, use a flow meter with fast sampling. Set the damping to 2 seconds or less. A Coriolis meter with 10 Hz sampling handles pulsating flow better than a standard electromagnetic meter.
Pricing and Quotation Details
Silver Automation Instruments supplies factory direct pricing. Price depends on meter type, size, liner, and output. An electromagnetic flow meter DN10 with PTFE liner and HART starts around USD 320. A Coriolis mass flow meter DN6 starts around USD 1,950. Prices are ex works Nanjing, China. Shipping to your country is extra.
Send us your chemical name, viscosity in cP, pipe size DN, flow range in L/h, and required output signal. We will recommend a Dura meter flow meter model and send a quote within 24 hours. Our contact details are Tel +86-25-68650347, WhatsApp +86-25-52155837, and WeChat +86 15365082610.
FAQ on Dura Meter Flow Meter and Dura-Products Dosing Dial Manuals
Can I use a flow meter with a Dura-Products chemical pump if the manual does not list one? Yes. Choose a meter that matches the pipe size and flow range. The manual only gives pump settings, not meter compatibility.
What is the lowest flow a Silver Instruments electromagnetic flow meter can measure? 0.5 L/h for water based chemicals above 5 µS/cm. For lower conductivity, use a Coriolis mass flow meter.
Do I need a specific liner for sodium hypochlorite? Use PTFE or PFA liner and titanium electrodes. Hastelloy C electrodes also work for low concentration bleach.
Can the flow meter output connect to a dosing pump controller? Yes. Use 4-20 mA HART or pulse output. Most controllers accept 4-20 mA input.
What if my pump flow is below 1 L/h? Use a Coriolis mass flow meter DN4 or a micro electromagnetic flow meter. Specify the actual flow range in your quote request.