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30 Ml/Min Flow Meter Chemical Resistance Specifications
Quick Answer: When you dose aggressive chemicals at exactly 30 ml/min, the wetted parts material dictates whether your meter runs 6 months or 6 years. Silver Automation Instruments supplies meters with PTFE, PFA, Hastelloy C22, and PEEK construction for this exact low-flow range. Send us your fluid type and concentration, and an engineer will recommend a meter that fits your process, not a generic catalog pick.
Why Chemical Specs Are Critical Below 100 ml/min
Here is the thing: at 30 ml/min, even a small material incompatibility leads to swollen seals, stuck rotors, or metal ion contamination. Pharmaceutical coating, fragrance injection, and catalyst addition all run at this range. A tiny pinhole in a PFA liner ruins a batch worth thousands of dollars. We saw this on a customer site in Indonesia where a cheap stainless steel gear meter lasted only three weeks against 20 percent nitric acid. Replacing it with a PEEK oval gear meter solved the problem instantly.
Wetted Materials We Specify for Corrosive Service
For most aggressive fluids, avoid general-purpose 316L stainless steel. Instead, specify one of these options.
PTFE and PFA liners with a stainless steel or reinforced polypropylene body handle hot concentrated acids, except for hydrofluoric acid at elevated temperatures. Ceramic measuring elements, available in some electromagnetic meters, resist nearly all chemicals but are fragile. Hastelloy C22 or C276 works well with hydrochloric acid, sulfuric acid, and chlorinated solvents. PEEK and TFE gears inside an oval gear meter are our go-to for solvent mixtures and acids below 40 degrees C.
For strong alkalis like 50 percent sodium hydroxide, PVC or polypropylene bodies with EPDM seals often work. But a Hastelloy Coriolis tube gives you better accuracy and zero risk of seal attack.
Silver Instruments Low-Flow Meter Recommendations
We offer several meter series matched to 30 ml/min chemical injection.
The OG micro oval gear meter, with optional PEEK gears and TFE O-rings, covers 1 to 500 ml/min. A paint manufacturer in Thailand uses this for metering isocyanate hardeners without gelation issues. The CMF mini Coriolis mass flow meter, with Hastelloy C22 tubes, measures 0 to 10 kg/h directly and ignores viscosity changes. A South African petchem lab chose this for high-accuracy catalyst injection at 25 ml/min. For conductive chemicals above 5 uS/cm, our EMAG mini magmeter with PTFE liner and tantalum electrodes works below 50 ml/min, ideal for ferric chloride dosing in wastewater plants.
A Customer Case from Malaysia
A palm oil methyl ester plant in Johor needed to add 30 percent methanolic sodium methoxide at precisely 30 ml/min into a transesterification reactor. Their previous metal-tube rotameter corroded within days. We supplied a CMF mini Coriolis with Hastelloy C22 wet
Parameters You Should Include in Your RFQ
To get a reliable quote, provide these details. Process fluid name and concentration. Operating temperature in degrees C and pressure in bar. Required flow range with turndown ratio if any. Pipe connection size and type, such as 1/4 inch NPT or DN6 flange. Hazardous area classification, for example ATEX Zone 1 or not. Viscosity in cP if the fluid is non-Newtonian. Do not skip viscosity for polymer solutions. It changes meter selection completely.
FAQ
Is a Coriolis meter overkill for just 30 ml/min of weak acid?
Not if you care about repeatability and direct mass measurement. A Coriolis reads g/min, ignores bubbles, and has no seals to swell. For dilute acetic acid at ambient temperature, an oval gear meter with TFE seals is cheaper and works very well. We help you balance capability against budget.
Which flow meter works with hydrofluoric acid at 30 ml/min?
Hydrofluoric acid attacks glass, ceramics, and most metals. We use a PTFE-coated gear meter or a PFA-lined magnetic meter with platinum electrodes. Always confirm concentration and temperature. Above 40 percent HF at hot conditions, options become very limited. In practice, many labs switch to a PFA peristaltic dosing pump with a separate scale for verification.
Can I use the same meter for multiple chemical lines?
You can, but we do not recommend it. Residual chemicals mix and cause corrosion or solids. Use a dedicated meter for each aggressive fluid. The cost of one meter is far less than a cross-contamination cleanup on a production batch.
Do you calibrate the meter with the actual chemical?
For safety, we normally calibrate with a compatible simulant such as deionized water or Isopar. If you need true fluid calibration, we can arrange it in our ISO 17025 lab. You must provide an SDS and accept the additional cost and lead time. Because of solvent evaporation, a live-fluid calibration also requires extra purging steps.
What is the price range for a 30 ml/min chemical-resistant flow meter?
A basic PEEK oval gear meter starts around 850 USD. A mini Coriolis with Hastelloy tubes starts from 2,900 USD. Prices vary with certifications, communication protocols like Modbus RTU, and exotic materials. Send us your pressure (bar), temperature (degrees C), pipe size (DN), and fluid composition, and we will return a formal quotation within 24 hours.
Send your fluid data to [email protected] or use the inquiry form on our contact page. An application engineer will reply with a matching datasheet and delivery estimate.
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