Liquid Turbine Flow Meters (LWGY Series)
Velocity Pulse Meters for Clean Low-Viscosity Liquid Service
Accuracy ±0.5 % of rate
Pipe DN4 to DN300
Pulse output via magnetic pickup
- Tungsten-carbide bearings standard; ceramic upgrade option
- 304 / 316L / duplex stainless body, choose at quote
- Built to JB/T9246-2016 turbine flow sensor standard
The LWGY Series covers velocity-type pulse-output measurement for clean low-viscosity liquid at or below 10 cSt. The Series spans DN4 through DN300 across 17 bore sizes with ±0.5 % of rate and 1:10 to 1:20 turndown. Fluid scope runs diesel, gasoline, kerosene, jet fuel, light cycle oil, ethanol, glycol-water mix, and cooling water. Heavy fuel oil and slurry are out of range and go to Coriolis or EMF.
LWGY Liquid Turbine models
Ten fluid-specific models on the LWGY Series. Each card carries its own bore range, material default, and scenario; the sub-hub routes the buyer to the right model page.
Diesel Flow Meter
Diesel and #2 fuel-oil distillate metering for terminal loading, fleet refuelling, and emergency-generator daily tank service.
View configuration →Fuel-Oil Turbine Flow Meter
Light fuel oil, #2 heating oil, kerosene, and light cycle oil service. Stays inside the ≤ 10 cSt range at warm operating temperatures; HFO and IFO require Coriolis instead.
View configuration →Gasoline Flow Meter
Retail fuel skid, fleet card-reader systems, jet fuel A-1 sub-measurement, and aviation refuelling cross-coverage.
View configuration →Chemical Liquid Turbine Flow Meter
Non-conductive solvents (acetone, methanol, ethanol, toluene, xylene) below the EMF conductivity floor.
View configuration →LPG Turbine Flow Meter
Liquid LPG service (propane, butane) at 0.2 to 0.3 cSt. Vapor-phase LPG goes to the gas turbine sub-hub instead.
View configuration →Sanitary Turbine Flow Meter
Non-conductive sanitary fluids: ethanol CIP, USP purified water, glucose syrup warm, glycerine warm, pharmaceutical solvents.
View configuration →Small-Bore Turbine Flow Meter
OEM modular skid integration, analytical lab measurement, pilot-plant batch reactor, fuel-cell and electrolyzer test-bench service.
View configuration →Water Turbine Flow Meter
Process water, RO permeate, glycol-water mix, and cooling-water service where conductivity sits below the EMF floor.
View configuration →Cooling Water Flow Meter
Chiller-loop and cooling-tower return-line measurement for HVAC, data center, and process plant service.
View configuration →Hot Water Flow Meter
District heating supply, boiler-feed water, and process hot-water service at ≤ 150 °C.
View configuration →How LWGY liquid turbine meters work
A liquid turbine flow meter measures volumetric flow through a free-spinning rotor mounted in the pipe bore. Fluid pushes against the rotor blades, the rotation rate becomes proportional to fluid velocity through a fixed K-factor calibrated for each meter, and a magnetic pickup coil downstream of the rotor translates blade passage into a pulse train. The on-board electronics count pulses, multiply by the K-factor, and output volumetric flow on pulse, 4-20 mA, RS-485 Modbus, or HART. Accuracy is ±0.5 % of rate across the calibrated turndown.
The LWGY body and impeller materials run 304 stainless standard, 316L for chemical service, and duplex for chloride or sulfide carry-over. Tungsten-carbide bearings are the standard build for hydrocarbon, water, and chemical service. Ceramic bearings are the upgrade for high-purity service (no metallic carry-over to the process), high-RPM service near the turndown ceiling, or non-magnetic environments. CNEX Ex d (flameproof) certification is selectable for hazardous-area zone-1 on petroleum, chemical, and fuel-handling lines.
When to specify LWGY liquid turbine
Match the service against the table below. Out-of-range fluid goes to vortex, electromagnetic, Coriolis, or the gas turbine family.
| Service | Turbine LWGY | Alternative |
|---|---|---|
| Clean diesel, gasoline, kerosene, jet fuel | Standard pick | — |
| Light fuel oil & distillate (≤ 10 cSt warm) | Standard pick | — |
| Heavy fuel oil (HFO / IFO 380 / 180, 30–380 cSt) | Out of range | Coriolis (ZLMFM) or PD meter |
| Process water, glycol-water mix, cooling water | Acceptable | EMF (LEA) preferred when conductive |
| Slurry, abrasive fluid, mining concentrate | Damages rotor bearing | EMF (LEA) with PU or ceramic liner |
| Steam, wet gas, 2-phase service | Out of liquid range | Vortex (LUGB), thermal mass (TMF), or gas turbine |
| Custody-transfer liquid (≤ 0.1 % accuracy) | Below custody accuracy | Coriolis (ZLMFM) for ≤ 0.1 % |
Application-to-build map.
LWGY Series coverage across 10 fluid-specific models. Each row shows the body and impeller default; specify materials, pressure class, and Ex d option at quote.
| Service | Body / Impeller default | Model page |
|---|---|---|
| Diesel / #2 fuel oil terminal loading | 316L body + 2Cr13 impeller, Ex d zone-1 | Diesel Flow Meter |
| Light fuel oil, kerosene, light cycle oil | 316L body + 2Cr13 impeller | Fuel-Oil Turbine |
| Gasoline retail skid, jet fuel A-1 sub-meter | 316L body + 2Cr13 impeller, Ex d zone-1 | Gasoline Flow Meter |
| Acetone, methanol, ethanol, toluene, xylene | 316L or duplex body + duplex impeller, Ex d | Chemical Liquid Turbine |
| Liquid LPG (propane, butane) 0.2–0.3 cSt | 316L body + 2Cr13 impeller, Ex d zone-1 | LPG Turbine |
| Ethanol CIP, USP purified water, pharma solvent | 316L body + 2Cr13 impeller, 3.2 Ra polished | Sanitary Turbine |
| OEM skid, lab meter, pilot reactor, test bench | 304 or 316L body, ceramic bearing option | Small-Bore Turbine |
| Process water, RO permeate, glycol-water mix | 304 body + 430F impeller, tungsten-carbide bearing | Water Turbine |
| Chiller-loop, cooling-tower return, data center CDU | 304 body + 430F impeller, flange ANSI 150 | Cooling Water Flow Meter |
| District heating supply, boiler-feed, hot water ≤ 150 °C | 304 body + 430F impeller, high-temp bearing | Hot Water Flow Meter |
All LWGY models share ±0.5 % of rate, 1:10 to 1:20 turndown, JB/T9246-2016 standard, CNEX Ex d option, IP65/66/67 ingress, EMC 2014/30/EU, and 5–7 business days lead time. Specify body material (304 / 316L / duplex), impeller (430F / 2Cr13 / duplex), and pressure class (1.6 to 25 MPa) at quote.
Universal LWGY install requirements
Install rules across all LWGY models. Model-specific variations (Ex d wiring, fuel-handling skid grounding, sanitary clamp seating) live on each model page.
- Run the pipe full at the meter location Partial fill causes pulse pulsation and a biased K-factor. Install on the pressurised leg or add an auto-vent loop on gravity-drain service. The flow direction arrow on the housing must align with line flow.
- Strain the line and de-aerate before commissioning A pre-filter strainer upstream catches debris that damages the rotor bearing and shifts the K-factor. Air bubbles disturb the pulse train; locate the meter where the line is fully de-aerated.
- Keep upstream straight pipe at 10D minimum, downstream at 5D After a 90° elbow extend upstream to 20D. After a partially-open butterfly or ball valve extend to 50D upstream. Throttling valves go upstream of the meter, never immediately downstream.
- Slow-fill the sensor on first commissioning Never expose a dry rotor to a high-velocity flow shock; spalling and bearing failure follow. Open the inlet slowly, let the bore wet, then open the outlet valve to working flow.
- Inspect the impeller every 6 months Routine inspection pulls the impeller, checks bearings for wear or pitting, and verifies the K-factor against the calibration certificate. Replace the rotor on any pitting or measurable shaft play.
Frequently asked questions
Need help sizing the LWGY build?
Send line size, fluid, viscosity at operating T, pressure, and target flow. Engineering returns a sized model code and ship window within one business day.