Current position > Contact Us
Quick Answer: Flanged inline flow meters are the most serviceable choice for closed fluid loops because the meter body can be removed, cleaned, and recalibrated without cutting pipe. Silver Automation Instruments supplies electromagnetic, Coriolis, vortex, oval gear, ultrasonic, and thermal mass meters with ASME B16.5 and EN 1092-1 flanges from DN15 to DN300. We trade as Silver Instruments in Southeast Asia and the Gulf region. We also match short calibrated straight-run spools and pressure and temperature taps to your loop design.
Send us your pressure in bar, temperature in °C, pipe size in DN, and flow range for a same-day quote. Include the fluid type and conductivity or viscosity if possible.
Threaded connections are fine for small air lines. Flanged connections are different. A paint manufacturer in Vietnam learned this last year after swapping to DN50 electromagnetic meters on a solvent recovery loop. The flanged body allowed the maintenance team to drop the meter out in 40 minutes. No pipe cutting. No production stop beyond the scheduled window.
Because the flange face carries the alignment, the meter fits back in the same position after service. Most engineers skip this part at first. They focus on accuracy and forget that the meter will be serviced at 2 a.m. with limited staff. Flanged connections reduce that service risk. You unbolt the flanges, remove the meter, and install a dummy spool if the loop must stay online.
We do not recommend one meter type for every loop. The right selection depends on conductivity, flow range, pressure, temperature, and what the plant needs to measure.
Electromagnetic flow meters: Use for water, wastewater, acids, slurries, and any liquid above 5 µS/cm. These meters cover DN10 to DN300 with PTFE or PFA liner, 316L electrodes, and 4-20 mA HART. Flange ratings include PN16, PN40, ANSI 150, and ANSI 300.
Coriolis mass flow meters: Use for mass flow in kg/h, density, and batch control. Common sizes range from DN15 to DN80. Coriolis meters handle viscosity changes and do not need long straight upstream pipe. We have supplied Coriolis meters for chemical plants in Mexico that dose solvents from 20 cP to 200 cP.
Vortex flow meters: Use for saturated steam, hot water, and compressed air. Sizes from DN15 to DN300. A vortex meter needs a straight run of 15D upstream and 5D downstream. We can supply calibrated pipe sections to match.
Oval gear flow meters: Use for diesel, lubricating oil, and fuel transfer. Sizes DN15 to DN50. These work well in permanent skid loops where flow rate is low and viscosity is high.
Ultrasonic and thermal mass meters: Use for large pipes, biogas lines, flare gas, or clean water loops. We configure clamp-on and inline spool types with flanged process connections.
For hazardous loops in oil and gas or chemical plants, we supply ATEX Zone 1 and Zone 2 versions on Coriolis, electromagnetic, vortex, and thermal mass meters.
Most flow meters do not perform well when installed too close to elbows, valves, or pumps. In practice, the correct spool saves more measurement error than a higher priced meter. The common fix is not a long pipe. It is a calibrated spool section with the correct internal diameter, flange face, and straight run. We supply these spools as separate items or preassembled with the meter.
For a DN100 electromagnetic meter on a chilled water loop, we normally add a 500 mm upstream spool and a 250 mm downstream spool. That gives 5D and 2D straight lengths. For a DN80 vortex meter on a saturated steam line, we supply a 1200 mm upstream spool. That gives 15D. Each spool can include a PT100 RTD thermowell and a 4-20 mA pressure transmitter tap. The whole assembly ships with a calibration certificate and paint marking for flow direction.
Flange standards we keep in stock: ASME B16.5 Class 150 and Class 300, EN 1092-1 PN16 and PN40, and JIS 10K. We can switch to lap joint flanges for plastic-lined pipe or for food plants that need easy cleaning.
Here is the thing. Many RFQs we receive only say we need a flow meter. We then ask for fluid, conductivity, viscosity, flow range, pressure, temperature, and pipe schedule. These details change the meter size and liner material.
Example one: a seawater desalination plant in the Middle East needed a flow meter for brine at 52 °C and 18 bar. We supplied a DN80 electromagnetic flow meter with a PTFE liner, titanium electrodes, and PN40 flanges. Output was 4-20 mA HART with RS485 Modbus as backup.
Example two: a food grade syrup loop in Malaysia required a DN40 Coriolis meter. The flow range was 1,500 kg/h to 12,000 kg/h. The line pressure was 8 bar. We programmed the meter for mass flow, density, and temperature before shipment.
Example three: a chemical plant in Thailand needed an oval gear meter for diesel transfer on a skid. Flow range was 120 L/h to 1,200 L/h. We supplied a DN20 meter with a pulse output and a local totalizer.
We can quote a complete inline metering package in one working day if you send the right data. Send us the pressure in bar, temperature in °C, pipe size in DN, and flow range. Also include the fluid name, conductivity in µS/cm for electromagnetic meters, viscosity in cP for oval gear or Coriolis meters, and the flange standard if known.
Do not send a long specification document as the first message. A short list works better. Our engineers will select the meter type, liner, electrode material, flange rating, and straight-run spool length from that data.
Contact Silver Automation Instruments directly:
Tel: +86-25-68650347
WhatsApp: +86-25-52155837
WeChat: +86 15365082610
Website: flow-meter.com.au
1. What flange standards do Silver Automation Instruments support?
We stock ASME B16.5 Class 150 and Class 300, EN 1092-1 PN16 and PN40, and JIS 10K flanges. Other standards are available on request.
2. Can you supply the calibrated pipe spools with the meter?
Yes. We build the meter, upstream and downstream spools, PT100 RTD, and pressure transmitter tap as one calibrated assembly. We mark the flow direction and include a certificate.
3. What is the benefit of a flanged inline meter versus a wafer meter?
A flanged meter is easier to remove, safer at higher pressure, and simpler to seal on permanent loops. A wafer meter saves space but needs careful mounting and may not suit all pipe schedules.
4. Do you offer ATEX Zone 1 flow meters?
Yes. We supply ATEX Zone 1 and Zone 2 versions for Coriolis, electromagnetic, vortex, and thermal mass meters. Flanged process connections are standard on these models.
5. What is the lead time for a flanged meter with a calibrated pipe assembly?
Standard DN15 to DN150 electromagnetic and vortex meters with carbon steel flanges ship in 7 to 14 days. Coriolis meters, exotic liners, and preassembled instrumented spools may take 3 to 5 weeks depending on the flange class and material.
Send us your operating data now. Include pipe size DN, flow range, pressure bar, temperature °C, and fluid type. Tell us if the loop runs continuously or in batches. We will return a specific model, flange standard, and spool recommendation. That is the fastest way to get the right inline flow meter for your permanent fluid loop.
