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『Oil Flow Meter for 10000 cSt: Ultimate Engineering for Extreme Asphalt Compounds』Related information(flow rotameter|digital flow meter|balo meter|hydraulic flow meter|volumetric meter|positive displacement meter|pitot tube flow meter|displacement meter|cfm meter|variable area flow meter|inline flow meter|differential pressure flow meter|calibrated flow meter|velocity meter|paddle wheel flow meter|oval gear flow meter|anemometer hvac|multiphase flow meter|doppler flow meter|thorpe tube flowmeter|heat flow meter)
Oil Flow Meter for 10000 cSt: Ultimate Engineering for Extreme Asphalt Compounds
Quick Answer: Positive displacement oval gear meters and Coriolis mass flow meters with jacket heating are the best choices for asphalt, bitumen, and heavy fuel oils up to 10000 centistokes. Silver Automation Instruments supplies these meters with 4-20 mA HART output, PT100 temperature compensation, and ATEX Zone 1 certification for direct use in refinery blending and road construction plants. To get a recommendation and price, send us your operating viscosity, temperature, pipe size (DN), and flow rate range.
Why 10000 cSt Demands a Special Meter
Asphalt at ambient temperature is solid. When heated to 150 °C or 180 °C, its viscosity drops to 3000 to 10000 cSt, depending on the grade. This is still 3000 times thicker than water. Turbine meters and electromagnetic flow meters simply stop working in this fluid. They need conductive liquids or sufficient velocity to spin a rotor. Asphalt does not meet any of these conditions. Here is the thing: even if you manage to pump it, the flow profile is laminar and the fluid sticks to everything. You need a meter that physically captures the fluid in a known volume, or one that measures mass directly without moving parts inside the flow path.
Oval Gear Flow Meters for Asphalt Batching
Positive displacement oval gear meters are a workhorse for asphalt loading and batching. The two oval rotors trap a fixed volume of fluid between the housing and gears. With every rotation, they push this volume out. This makes them nearly immune to viscosity changes. Our Silver OGM series oval gear meters have been used for bitumen truck loading in Malaysia, polymer-modified asphalt blending in Indonesia, and fuel oil transfer in Saudi Arabia. We offer sizes from DN15 to DN100 with cast steel or stainless steel bodies. For 10000 cSt, the standard clearance gears are fine, but we also supply special high-viscosity rotors that create less shear. Most engineers skip this part, but cold start behaviour matters. If the pump turns on before the meter jacket is hot enough, the gears can stall. A jacket using thermal oil or steam at 4 to 6 bar prevents this.
Coriolis Mass Flow Meters for Blending and Custody Transfer
When you need mass flow rate and density of cutback asphalt or bitumen emulsion, a Coriolis meter is the right answer. It has no moving parts in the flow and measures directly in kg/h. But there is a catch: high viscosity creates a high pressure drop across the Coriolis tubes. For 10000 cSt at 20,000 kg/h, you might see a pressure loss of 1.5 to 3 bar depending on the tube design. We spec twin straight-tube Coriolis meters for high-viscosity services. Our Silver CMF series includes models rated for viscosity up to 50000 cP (about 55000 cSt for density near 0.9). These meters output mass flow, density, and temperature over 4-20 mA HART, Modbus RTU, or pulse. In a blending application for a Vietnamese customer, we supplied a CMF-DN25 with a hot oil jacket and ATEX II 2G Ex db IIC T6 certification. The system measures 5000 kg/h of base bitumen with ±0.15% accuracy.
Jacket Heating and Temperature Compensation
Without active heating, asphalt solidifies inside the meter body and destroys it. All our meters for 10000 cSt come with integral jackets for steam, hot oil, or electric tracing. The jacket surrounds the measuring chamber or the flow tubes. We mount a PT100 sensor directly in the meter body or upstream to feed into the transmitter. The transmitter compensates viscosity-induced volume changes and outputs corrected flow. In practice, we see that a jacket keeps the fluid at a steady temperature wit
Output Signals and Hazardous Area Certification
Sites that handle hot asphalt often fall under ATEX or IECEx Zone 1 or Zone 2 because of the presence of hydrocarbon vapors. We build oval gear meters with intrinsically safe pick-up coils (Namur 8 V DC) or explosion-proof transmitters. Coriolis meters come in Ex d or Ex ia versions. Standard output options include 4-20 mA HART, passive pulse, and RS485 Modbus. This allows direct connection to a PLC, flow computer, or our paperless recorder for batch control. We have seen many customer sites use a local flow indicator with a scalable 4-20 mA loop to control a pneumatic valve for truck loading. It is a simple setup that works.
A Real Asphalt Plant Example
Last year, a contractor in Australia needed to replace a mechanical gear meter that kept seizing on hot bitumen. They were filling 200-litre drums with a mobile skid. Operating conditions: 60/70 pen grade bitumen at 160 °C, viscosity 5000 to 8000 cSt, flow rate 30 L/min, pipe DN25, pump pressure 10 bar. The mechanical meter had no jacket and would seize after the first cold start. We supplied a Silver OGM-DN20 oval gear meter with a cast steel body, steam jacket connections, and a 4-20 mA transmitter. The customer connected it to their existing PID controller. Since installation 14 months ago, the meter has filled over 40,000 drums with no downtime. The error stayed within 0.5%, confirmed by a weighbridge. This is what we mean by solid engineering for extreme compounds.
How to Get a Quote for a 10000 cSt Flow Meter
Send us a brief email with these six parameters: fluid name and viscosity (cSt at operating temperature), operating temperature (°C), flow rate range (min, normal, max in L/min or kg/h), pipe size (DN), process pressure (bar), and hazardous area classification (if any). Also tell us if you need jacket heating and what medium is available (steam, hot oil, electric). We will reply with a recommended model, datasheet, dimensional drawing, and price in AUD or USD within one business day. Reach us through flow-meter.com.au or contact our engineering team directly. Our oval gear and Coriolis meters are in stock at our warehouse in Perth, so express shipping across Australia, Southeast Asia, and the Middle East is available.
FAQ
Q: What is the maximum viscosity an oval gear meter can handle?
A: Standard oval gear meters from Silver Instruments handle up to 10000 cSt with proper jacket heating. Special clearance versions can go up to 50000 cSt for very heavy residues.
Q: Does a Coriolis meter work for asphalt with 10000 cSt?
A: Yes. We recommend straight-tube Coriolis meters for high viscosity. Expect some pressure drop, but the mass flow accuracy stays within 0.2%.
Q: Can I use a magnetic flow meter for bitumen?
A: No. Bitumen is non-conductive and magnetic flow meters require a minimum conductivity of 5 µS/cm.
Q: Do these meters come with ATEX certification?
A: Yes. Both oval gear and Coriolis meters are available with ATEX II 2G Ex db IIC T6 for Zone 1, or Ex ia for Zone 0. IECEx is also available on request.
Q: What maintenance is needed for an oval gear meter in asphalt service?
A: With jacket heating and a strainer upstream, maintenance is low. Check the gear clearance and replace O-rings every 2 years. In heavy service, we advise a yearly visual inspection of the measuring chamber.