Threaded Turbine Flowmeter
Precision mechanical flow measurement for small-diameter clean liquid applications—delivering ±0.5% accuracy
Compact turbine flowmeters with NPT/BSP threaded connections measure water, oils, and chemicals in pipes from ½" to 2" with ±0.5% accuracy and 1:20 turndown ratio. No welding or flanges required—thread directly into process lines for rapid installation in fuel dispensing, chemical dosing, hydraulic systems, and precision liquid transfer applications.
- Pipe Size: DN4 – DN50 (⅛" – 2")
- Thread Standards: NPT, BSP, BSPT, G-thread
- Flow Accuracy: ±0.5% to ±1% of reading
- Turndown Ratio: 1:10 to 1:20
- Flow Range: 0.04 – 120 m³/h (application dependent)
- Viscosity: 0.5 – 650 cSt
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Precision Liquid Metering in Compact Threaded Package
Four reasons threaded turbines outperform alternatives for small-pipe precision applications
- ±0.5% accuracy—meets custody transfer and precision batching requirements
- 15-minute installation—90% faster than flanged alternatives
- 0.5-650 cSt range—one meter handles water through heavy oils
- High Pressure—measure at full hydraulic system pressure
Parameter | Specification |
|---|---|
Measurement Principle | Mechanical turbine (positive displacement principle) |
Application | Clean liquid measurement: water, oils, fuels, chemicals, hydraulic fluids |
Pipe Size Range | DN4 – DN50 (⅛" – 2") |
Thread Standards | NPT (ANSI/ASME B1.20.1), BSP/BSPT (ISO 7/1), G-thread (ISO 228-1) |
Flow Accuracy | ±0.5% of reading (standard) | ±0.2% of reading (calibrated) |
Repeatability | ±0.1% of reading |
Turndown Ratio | 1:10 (standard) | 1:20 (wide range models) |
Fluid Viscosity | 0.5 – 650 cSt (extended range with calibration) |
Fluid Temperature | 20°C to +120°C (standard) | -40°C to +200°C (high-temp models) |
Operating Pressure | Up to 25 MPa (3600 psi) depending on size and material |
Body Material | 304 SS, 316L SS (standard), Aluminum (low pressure), Brass (water service) |
Rotor Material | 17-4 PH stainless steel, PTFE-coated (chemical resistance) |
Bearing Type | Tungsten carbide or sapphire jewel bearings (low friction, long life) |
Wetted Materials | SS body, SS rotor, tungsten carbide/sapphire bearings, Viton/PTFE O-rings |
Pressure Drop | 0.03 – 0.15 bar at maximum flow (size dependent) |
Output Signal | Pulse (magnetic pickup, Hall effect, reed switch), 4-20mA (with converter) |
Display | LCD totalizer (optional): forward total, reverse total, flow rate |
Fluid Compatibility | Water, gasoline, diesel, jet fuel, kerosene, hydraulic oils, solvents, glycol, alcohols |
Not Suitable For | Slurries, high-gas-content fluids, sticky/coating fluids, non-lubricating gases |
Protection Rating | IP65 (electronics housing), IP67 (optional) |
Quality Certifications | CE |
When to Choose Turbine Over Electromagnetic or Ultrasonic
vs. Electromagnetic Flowmeters:
- Measures non-conductive fluids (oils, fuels, solvents)
- Lower cost for small sizes (DN4-DN50)
- Higher pressure rating (25 MPa vs 1.6-4 MPa)
- Requires clean fluid (EMF handles solids)
- Has moving parts requiring maintenance
- Pressure drop (EMF is obstruction-free)
vs. Positive Displacement Meters:
- Lower pressure drop
- Higher maximum flow rates
- Lower cost
- Lower accuracy at very low flows
- Requires minimum flow velocity
- Less suitable for high-viscosity (>650 cSt)
vs. Ultrasonic Flowmeters:
- Better accuracy for small pipes (
- No minimum conductivity requirement
- Works on opaque or aerated fluids
- Lower cost for threaded sizes
- Has moving parts (ultrasonic is non-contact)
- Requires clean fluid
- Higher maintenance
Best Applications for Threaded Turbine:
- Clean, lubricating liquids (water, oils, fuels)
- Small pipe sizes requiring high accuracy
- Custody transfer or precision batching
- High-pressure systems
Threaded turbines deliver accurate measurement where compact size and fast installation are essential
Fuel Dispensing & Transfer
- Gasoline and diesel dispensing pumps
- Aviation fuel truck meters
- Fuel oil delivery verification
- Marine fuel bunkering
- Generator fuel consumption monitoring
- Vehicle fleet refueling stations
Chemical Dosing & Batching
- Additive injection metering
- Chemical batch process control
- Catalyst feed measurement
- Solvent transfer monitoring
- Raw material inventory tracking
Water Treatment & Distribution
- Chemical feed pumps (coagulants, polymers, chlorine)
- RO system monitoring
- Deionization circuit flow
- Filter performance tracking
- Water softener regeneration
- Small municipal services
OEM Equipment & Machinery
- Beverage dispensing equipment
- Car wash chemical proportioning
- Food processing ingredient dosing
- Printing press ink delivery
- Semiconductor chemical delivery
- Paint mixing systems
Ready for Accurate, Stable Flow Measurement?
Whether for fuel, water, or light chemicals, we provide customized threaded connections, materials, and output options to match your system. Speak with our engineers and get a precise solution proposal.
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.
View moreContact Us
info@hbmeter.cc
(+86) 152-3780-0315
(+86) 152-3780-0315
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