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Flow Meter 1 1/2 Inch Flanged Models for High-Volume Liquid Distribution Network Controls
Quick Answer: A 1 1/2 inch flanged flow meter handles most high volume liquid distribution loops between 1 and 40 m3/h. Silver Instruments supplies DN40 flanged electromagnetic, vortex, and oval gear meters with 4-20 mA HART output for remote monitoring and batching. Send your flow range in m3/h, pressure in bar, and temperature in Celsius for a fixed price.
DN40 Flanged Meters in Liquid Distribution Networks
Liquid distribution systems often use 1.5 inch headers for water booster stations, fuel transfer skids, and chemical dosing lines. A flanged DN40 meter fits directly between ANSI Class 150 or PN16 flanges. No thread sealant or wafer alignment is needed.
Flanged models stay stable when pumps cycle and pressure spikes occur. We have seen threaded meters leak after one year of vibration in Southeast Asia. This problem grows in Middle East and West Africa plants where ambient heat and dust affect small seals.
Key Specifications for 1 1/2 Inch Flanged Flow Meters
Silver Instruments builds this size with 316L stainless steel electrodes for electromagnetic types and aluminum or stainless steel housings. Wetted parts can be PTFE lined for corrosive liquids or hard rubber for raw water.
Typical accuracy is 0.5 percent of reading for electromagnetic meters, 1.0 percent for vortex meters, and 0.5 percent for oval gear meters. Flow range depends on liquid type. Water runs from 1 to 40 m3/h in a DN40 line. Oil in oval gear meters moves from 0.6 to 12 m3/h. Steam in vortex meters works from 1.5 to 30 m3/h at up to 16 bar.
Output options include 4-20 mA, pulse, RS485 Modbus, and HART. Power can be 24 V DC or 85 to 265 V AC. For hazardous areas, choose ATEX Zone 1 or Zone 2 approval with intrinsic safety barriers. Optional PT100 sensors report temperature on the same transmitter.
Choosing the Right Technology for High Volume Control
For water and wastewater lines, use an electromagnetic meter. It has no moving parts and no pressure drop. The minimum conductivity is 5 to 20 µS/cm. If your liquid is reverse osmosis permeate or deionized water, check the conductivity first.
For diesel, fuel oil, and solvents, select an oval gear meter. This type gives repeatable batching from 2 to 1000 cP. A paint manufacturer in Southeast Asia installed four flanged oval gear meters on solvent headers. Each unit was calibrated at 120 cP and 30 Celsius. They use the pulse output to stop a batch at 800 L.
For hot water, saturated steam, or ther
Installation Notes for DN40 Flanged Flow Meters
Keep 5 to 10 diameters of straight pipe upstream and 2 to 3 diameters downstream. Install the meter after the strainer and before any branch tee. For liquids with solid particles, use the electromagnetic version with a PTFE liner and no obstruction in the bore.
Ground the flanged body correctly. In plastic pipes, use grounding rings. For pulse or 4-20 mA signal to a PLC, run shielded cable in a separate conduit from variable frequency drives. Most engineers skip this part and then chase signal noise for days.
If you measure non-Newtonian fluid or density changes with temperature, request a on site calibration with a master meter. Silver Instruments can preset the K-factor for common liquids before shipping.
Get a Quote for Flow Meter 1 1/2 Inch Flanged Models
Send us your pressure in bar, temperature in Celsius, pipe size in DN, and flow range in m3/h or L/min. Include liquid name and viscosity if known. For mass units, tell us the expected kg/h or t/h.
Contact Silver Automation Instruments. Tel: +86-135-1213-1526. Whatsapp: 86-135-12131526. WeChat: +86 13512131526. You can visit flow-meter.com.au for technical drawings and datasheets.
Frequently Asked Questions
Q1: What flow range can a 1 1/2 inch flanged flow meter cover?
Electromagnetic types cover 1 to 40 m3/h for water. Vortex meters work best from 1.5 to 30 m3/h. Oval gear meters handle 0.6 to 12 m3/h for oil.
Q2: Which flow meter type is best for high volume water distribution?
Electromagnetic meters are the first choice. They have low pressure loss and no moving parts. Minimum conductivity should be above 5 to 20 µS/cm.
Q3: Can I use a 1 1/2 inch flanged meter for diesel or fuel oil?
Yes. An oval gear meter or Coriolis meter works well. Oval gear costs less and gives accurate batching for 2 to 1000 cP liquids.
Q4: What flange standards are available on DN40 meters?
Silver Instruments supplies ANSI Class 150, PN16, and JIS 10K flanges. Tell us your local pipe standard when you send the inquiry.
Q5: How long is the lead time for flanged flow meters?
Standard DN40 electromagnetic meters ship in 7 to 15 days. Custom flange drilling, ATEX certification, or special liners add 2 to 4 weeks.
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