Threaded Electromagnetic Flowmeter
Compact electromagnetic flow measurement for small-diameter process lines—this flowmeter features direct threaded pipe connections (NPT/BSP/G-thread) from DN15 to DN80, eliminating flange welding and reducing installation costs by 40-60% compared to flanged alternatives. Unlike wafer-style meters requiring bolt-up assembly or insertion types needing welded mounting bases, threaded connection enables rapid deployment in tight spaces typical of OEM equipment, pilot plants, skid-mounted systems, and instrumentation panels—delivering ±0.5% accuracy with tool-free installation in minutes rather than hours
- Pipe Diameter: DN6 ~ DN100
- Thread Standards: NPT, BSP, G-thread (ISO 228)
- Flow Accuracy: ±0.5% of reading (±1.0% optional)
- Velocity Range: 0.3 – 10 m/s
- Pressure: 1.6 MPa (standard) | 4.0 MPa (optional)
- Protection: IP65 (standard) | IP67/IP68 (optional)
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Professional Small-Bore Metering Without the Flanged Meter Cost
Four reasons threaded connection outperforms flanged flowmeters for small-diameter applications
- 90% faster installation compared to welded flange connections
- Reduces required installation space by 40-50% versus flanged alternatives
- 40-60% lower total installed cost for DN6-DN100 pipe sizes
- Thread standard compatibility across all major global markets
Parameter | Specification |
|---|---|
Measurement Principle | Electromagnetic (Faraday's Law) - full-bore velocity measurement |
Pipe Size Range | DN6 ~ DN100 |
Thread Connection Standards | NPT, BSPT, BSP, G-thread (ISO 228-1) |
Flow Accuracy | ±0.5% of reading (±0.3% optional for custody transfer) |
Repeatability | ±0.1% of reading |
Velocity Range | 0.3 – 10 m/s (bidirectional) |
Fluid Temperature | -25°C to +80°C (rubber liner) | -25°C to +130°C (PTFE liner) |
Ambient Temperature | -20°C to +60°C |
Pressure Rating | 1.6 MPa (PN16 standard) | 4.0 MPa (PN40 optional) |
Burst Pressure | 3x rated pressure |
Conductivity Requirement | ≥ 5 μS/cm (≥20 μS/cm recommended for optimal performance) |
Liner Materials | NBR, PTFE, PFA, FEP (application dependent) |
Electrode Materials | 316L SS, Hastelloy C, Titanium, Tantalum, Platinum-Iridium |
Body Material | 304 SS (standard) | 316L SS (corrosive environments) |
Power Supply | 85-265V AC (50/60Hz) | 12-36V DC |
Output Signals | 4-20mA, Pulse, Frequency, RS485 Modbus |
Communication Protocols | Modbus RTU (standard) | HART (optional) | Profibus DP (optional) |
Protection Rating | IP65 (standard) | IP67/IP68 (optional) |
Display | Backlit LCD: flow rate, totals, velocity, diagnostics |
Configuration | Integrated (sensor + converter combined) |
Explosion-Proof | SIL-3 Certification |
Quality Certifications | CE, ATEX/IECEx (optional for hazardous areas) |
Liner & Electrode Material Selection Guide
Materials Optimized for Process Compatibility
Select liner and electrode combinations matched to your fluid chemistry and temperature
Liner Materials Table:
Lining Material | Temperature Range | Chemical Resistance | Best Applications |
|---|---|---|---|
NBR | -25°C to +80°C | Good for water, mild chemicals | Potable water, cooling water, glycol solutions, light industrial process water |
PTFE | -25°C to +130°C | Universal chemical resistance | Strong acids, alkalis, solvents, high-purity chemicals, pharmaceutical processes |
PFA | -25°C to +130°C | Superior to PTFE for gas permeation | Ultra-pure water, semiconductor chemicals, food/pharma requiring USP Class VI compliance |
FEP | -25°C to +130°C | Excellent chemical resistance | High-purity applications, acidic/alkaline solutions, specialty chemical metering |
Electrode Materials Table:
Electrode Material | Corrosion Resistance | Typical Applications |
|---|---|---|
316L Stainless Steel | General purpose, moderate corrosion | Potable water, municipal water, neutral process fluids, cooling water circuits |
Hastelloy C-276 | Superior for oxidizing/reducing acids | Sulfuric acid, hydrochloric acid, ferric chloride, wet chlorine, chemical processing |
Titanium | Excellent for chlorides and seawater | Sodium hypochlorite, chlorine dioxide, seawater, brine, brackish water, bleach |
Tantalum | Extreme corrosion resistance | Highly concentrated acids, pharmaceutical chemicals, aggressive chemical mixtures |
Platinum-Iridium Alloy | Universal chemical inertness | Ultra-pure water (resistivity>1 MΩ·cm), semiconductor chemicals, research applications |
Protection Class Section:
Optimized for Small-Diameter Process Measurement
Cost-effective precision metering where compact installation and rapid deployment are essential
Chemical & Process Industries
- Chemical dosing and additive injection lines
- Reactor feed and catalyst delivery
- Solvent and reagent transfer
- Sample loops and bypass measurement
- Batch process ingredient metering
- Quality control laboratory supply lines
Food, Beverage & Pharmaceutical
- CIP (Clean-in-Place) circuit monitoring
- Ingredient dosing (flavors, colors, vitamins)
- Sterile water distribution
- WFI (Water for Injection) measurement
- Syrup and concentrate metering
- Sanitary process verification
Pilot Plants & Laboratory Systems
- Bench-scale process development
- Multi-stream sampling systems
- Research reactor feed lines
- Catalyst screening equipment
- Continuous flow chemistry
- Process optimization studies
Water Treatment & Purification
- RO system monitoring
- Deionization circuit flow
- Chemical feed verification(coagulants, polymers)
- Backwash flow measurement
- Filter performance monitoring
- Ultrapure water distribution (semiconductor, pharma)
OEM Equipment & Skid Systems
- Packaged water treatment skids
- Mobile process equipment
- Analyzer sample conditioning
- Instrumentation panels
- Test stands and rigs
- Portable measurement systems
Critical Installation Requirements
1. Straight Pipe Requirements
- Minimum: 5D upstream, 3D downstream (D = nominal pipe diameter)
- Recommended: 10D upstream, 5D downstream for optimal accuracy
- After bends, valves, or pumps: increase to 15-20D upstream when possible
2. Pipe Support
- Mandatory for DN32 and larger: Independent pipe support within 300mm of flowmeter
- Thread connections not designed to support pipe weight or thermal expansion loads
- Use spring hangers for systems with significant thermal cycling
3. Air Elimination
- Install flowmeter on upward-sloping or horizontal pipe sections
- Avoid high points where air can accumulate
- Provide air venting upstream if process contains entrained gas
4. Flow Direction
- Flow arrow on body must align with process flow direction
- Reversed flow will cause negative readings and measurement error
- Bi-directional models available for applications with flow reversal
5. Grounding
- Electrical continuity between fluid and flowmeter body essential
- For conductive fluids in metal pipe: ground via mounting or dedicated lug
- For non-conductive pipe or high-purity fluids: may require grounding rings or electrodes
6. Thread Sealant Selection
Avoid:
- Teflon tape containing metal (stainless/copper) on electrical threads
- Excessive sealant that can contaminate process fluid
- Thread sealants incompatible with process chemistry
Ready to Simplify Your Small-Bore Flow Measurement?
Our application engineers will help you select the optimal thread standard, liner material, and accuracy class for your specific process requirements.
info@hbmeter.cc
(+86) 152-3780-0315
1 Jingsan North Road, Xiangfu District, Kaifeng, Henan 475004 China
About HBmeter
AFT Instruments is a high-tech manufacturer delivering precision flow instrumentation for water, chemical, power, industrial automation, and process industries.
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info@hbmeter.cc
(+86) 152-3780-0315
(+86) 152-3780-0315
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