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Flomec PVC Water Processing and Irrigation Flow Meter TM20NQ9GMB Product Specifications
Quick Answer: The Flomec PVC water processing and irrigation flow meter TM20NQ9GMB is a plastic body pulse output meter for clean water. It fits small irrigation zones and water treatment skids. Silver Instruments supplies a direct replacement electromagnetic flow meter for buyers who need 0.5 percent accuracy, 4-20 mA HART output, or chemical resistance.
Silver Instruments Replacement for Flomec TM20NQ9GMB
Silver Automation Instruments manufactures flow meters for water and wastewater plants across Southeast Asia, Oceania, Latin America, Africa, and the Middle East. We see many requests for PVC water processing and irrigation flow meters like the Flomec TM20NQ9GMB. The original meter works well on clean water. Problems start when the water contains fertilizer salts, chlorine, sand, or organic material. In practice, most engineers replace the plastic turbine internals with a full bore electromagnetic flow meter.
Here is a real case. A tomato farm in Western Australia used the Flomec TM20NQ9GMB on a DN40 PVC main. The line pressure was 7 bar. The water carried a small dose of calcium nitrate. The pulse signal became unstable after four months. Silver Instruments supplied a DN40 electromagnetic flow meter with PTFE liner and 316L electrodes. The output was 4-20 mA HART. The signal remained stable for two seasons.
Typical Product Specifications for PVC Water Processing and Irrigation Meters
The Flomec TM20NQ9GMB product specifications cover small PVC body meters with threaded or flanged ends. Typical line sizes range from DN15 to DN50. The flow range depends on pipe size. Most units handle 1 to 120 L/min. Pressure ratings are usually 10 bar at 20 degrees C. Media temperature ranges from 0 to 60 degrees C. Accuracy for this class is plus or minus 1.5 to 2 percent of reading. Repeatability is plus or minus 0.5 percent. Output is normally pulse. Some versions offer a local display.
If you need a flow meter for dirty water, reverse osmosis reject, or dosing lines, choose a different measuring principle. Silver Instruments electromagnetic flow meters handle 0.5 percent of reading, full pipe diameters from DN15 to DN300, and media conductivity down to 5 microsiemens per cm. They work with PTFE or PFA liners and 316L, Hastelloy C, or titanium electrodes. Outputs include 4-20 mA HART, pulse, and RS485 Modbus. Electromagnetic meters are a direct upgrade from PVC turbine meters in water processing plants.
Installation Notes for PVC Irrigation Lines
Plastic body meters need straight pipe upstream and downstream. The standard rule is 10 diameters upstream and 5 diameters downstream. But many farm installations do not have this space. In that case, flow readings can drift by 3 to 5 percent. A compact electromagnetic flow meter from Silver Instruments needs less straight run. Some models need only 5 diameters upstream and 2 diameters downstream. This helps when
Do not install a PVC pulse output meter in direct sunlight for long periods in the Middle East. UV radiation can weaken the plastic body. Use a sun shield. The same applies to any PVC flow meter in North Africa or Western Australia. If the pipe is above ground and exposed, a PVDF body or a stainless steel electromagnetic flow meter lasts longer.
Price and Lead Time for PVC Flow Meter Replacements
Price for the Flomec TM20NQ9GMB depends on the local distributor and the output option. Bulk buyers often pay between 150 and 400 USD per unit for small PVC meters. Silver Instruments electromagnetic flow meters start at similar levels for DN15 and DN25 in standard 316L electrode versions with compact display. The big difference is cost of ownership. No moving parts means no internal wear. That advantage matters for fertilizer injection lines, cooling water loops, and washdown systems.
Standard DN15 to DN50 electromagnetic flow meters ship from Silver Instruments in 5 to 7 working days. Larger DN80 to DN300 meters take 10 to 15 working days. We ship from Nanjing, China to Southeast Asia, the Middle East, Africa, Latin America, and Oceania. DHL and sea freight options are available.
Send us your pressure (bar), temperature (degrees C), pipe size (DN), and flow range. Our engineers will confirm a model and price within 24 hours. You can contact Silver Automation Instruments directly at Tel +86-135-1213-1526, Whatsapp 86-135-12131526, or WeChat +86 13512131526.
FAQ on PVC Flow Meters for Water Processing and Irrigation
Q1: Is the Flomec TM20NQ9GMB suitable for fertilizer injection in irrigation?
A1: The PVC body meter works for clean water. Fertilizer acids and salts can wear internal parts. Silver Instruments offers a 316L electrode electromagnetic flow meter for those lines.
Q2: What is the typical accuracy of a PVC irrigation flow meter?
A2: Most turbine or nutating disk PVC meters have 1.5 to 2 percent accuracy. A Silver Instruments electromagnetic flow meter gives 0.5 percent of reading.
Q3: Can I use the TM20NQ9GMB on a DN80 line?
A3: No. The TM20NQ9GMB range covers small threads and flanges up to DN50. For DN80, use a full bore electromagnetic flow meter from Silver Instruments.
Q4: Does Silver Instruments supply pulse output flow meters for remote displays?
A4: Yes. Silver Instruments provides pulse, 4-20 mA HART, and RS485 Modbus output options for irrigation and water processing systems.
Q5: What is the lead time for a PVC water flow meter replacement?
A5: Standard DN15 to DN50 electromagnetic flow meters ship in 5 to 7 working days from Silver Instruments. Larger sizes take 10 to 15 working days.
This product specification review was prepared by Silver Automation Instruments. We are an industrial flow meter manufacturer for Southeast Asia, Oceania, Latin America, Africa, and the Middle East.
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