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DI Water Flow Meter with PVDF Liner Senses Ultra Pure High Purity Fluids
Quick Answer: For DI water and other ultra pure high purity fluids, a PVDF lined electromagnetic flow meter senses flow without contaminating the line. Silver Automation Instruments supplies these meters from DN15 to DN300 with 4-20 mA HART and RS485 Modbus outputs. Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range for a specific quote.
Why PVDF Lining Matters in DI Water and Ultra Pure Fluid Lines
DI water has very low conductivity and it pulls ions from metal surfaces. A standard rubber lined meter can work in water and wastewater, but it can contaminate ultra pure water loops. PVDF lining stops ion leaching and keeps the measured fluid clean. That is why semiconductor fabs, pharmaceutical plants, and solar cell makers specify PVDF lined electromagnetic flow meters for deionized water transfer.
Most engineers skip this part. They see low flow and low pressure and think a standard meter is fine. Then the liner swells or the electrodes drift. We have seen this on customer sites in Malaysia, Thailand, and Mexico. The fix is usually a PVDF liner and platinum electrodes from the start.
Recommended Flow Meter Models and Technical Specs
For DI water, Silver Automation Instruments recommends an inline electromagnetic flow meter with a PVDF liner. The measuring tube body can be 304 stainless steel with a PVDF liner and platinum electrodes. Typical accuracy is 0.5 percent of reading or better. Output options include 4-20 mA HART, pulse, and RS485 Modbus. The display covers total flow, instantaneous flow, and empty pipe detection.
Common sizes are DN15, DN25, DN40, DN50, DN80, and DN100. Larger sizes up to DN300 are available. Pressure ratings can be PN16 or PN40. Fluid temperature for PVDF liner is usually from -20 Celsius to 120 Celsius. Conductivity for standard electromagnetic flow meters should be above 5 µS/cm. Ultra pure water often has conductivity below 1 µS/cm, so we check the actual value before quoting. If conductivity is too low, we may suggest a special signal converter or a different technology.
For ultra pure high purity fluid batching, we also offer PVDF lined electromagnetic flow meters with no moving parts and a smooth straight bore. This design avoids dead zones and makes cleaning easier. Some customers use these meters after a reverse osmosis unit or after an electrodeionization skid. The meter senses flow without adding metal contact to the fluid.
Typical Applications and Customer Examples
We sell these meters to pharmaceutical water for injection loops, semiconductor rinse water lines, optical lens polishing water systems, and high purity gas scrubber feed lines. One customer in Vietnam u
Because the meter has no obstruction, pressure drop is negligible. That helps in low pressure DI water loops. The PVDF liner also resists acids and caustics used during clean in place cycles. Do not use PVDF with strong polar solvents like acetone or methyl ethyl ketone. Tell us your cleaning chemicals and we will confirm compatibility.
Platinum electrodes matter here. They provide stable signal in high purity water and they resist chemical attack during sanitation cycles.
How to Order a DI Water Flow Meter from Silver Automation Instruments
You can send us the following details for a quote: pipe size in DN or inches, flow range in liters per hour or cubic meters per hour, fluid temperature in Celsius, pressure in bar, conductivity in µS/cm, and output signal preference. We respond with a data sheet, price, and lead time. Typical lead time for PVDF lined meters is 10 to 15 working days.
Contact Silver Automation Instruments today. Tel: +86-25-68650347. Whatsapp: +86-25-52155837. WeChat: +86 15365082610. Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range for a specific PVDF lined DI water flow meter quote. You can also review the PVDF lined meter range at flow-meter.com.au.
FAQ
Can an electromagnetic flow meter measure DI water? It can if the conductivity is above the minimum threshold of the converter. For very low conductivity DI water below 1 µS/cm, we need to check the process data before quoting.
Why choose PVDF lining over PTFE for DI water? PVDF has good chemical resistance and better abrasion resistance than PTFE in many water transfer lines. PTFE is also available for higher purity or more aggressive chemical services.
What electrodes are best for ultra pure water? Platinum electrodes are the standard choice. Hastelloy C electrodes can be used when the water contains trace chlorides or when cleaning chemicals are more aggressive.
What is the minimum pipe size for a PVDF lined DI water flow meter? Silver Automation Instruments can supply DN15 meters for small flow rates. For even smaller flows, we can check whether an oval gear flow meter or a thermal mass meter fits better.
Do you supply PVC or polypropylene bodies for DI water? PVDF liner is the common wetted material. Inline metal body with PVDF liner gives pressure rating and dimensional stability. Full plastic body options are also available for certain low pressure high purity lines.
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