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Inline Gasoline Flow Meter: ATEX Explosion-Proof Certified Measuring Hardware for Fuel Transfer Skids
Quick Answer: Silver Automation Instruments supplies inline gasoline flow meters with ATEX Zone 1 and Zone 2 certification for fuel transfer skids. Choose an oval gear meter for clean gasoline transfer or a Coriolis meter for custody grade mass flow. Send your pipe size (DN), pressure (bar), temperature (°C), and flow range for a same day quotation.
A fuel transfer skid handles gasoline, diesel, and sometimes ethanol blends. The pump, filter, valves, and flow meter sit close to a hazardous area. Gasoline vapor forms an explosive atmosphere. An ATEX certified inline flow meter means the electronics and housing passed strict tests for that atmosphere. Silver Automation Instruments supplies meters marked Ex db IIB T6 Gb for Zone 1 and Ex ec IIB T3 Gc for Zone 2.
Most fuel transfer skids in Southeast Asia and the Middle East need Zone 1 on the meter body. This applies when the skid sits outdoors under a canopy or inside a bunded area. Zone 2 may work for well ventilated skids with no confined corners. Always check your local site classification before ordering. We have seen this on customer sites many times. A purchasing team picks a standard oval gear meter with pulse output. It fails the site audit because the terminal requires ATEX Zone 1. That causes a delay.
Inline Meter Models for Gasoline Transfer Skids
Two meter types dominate fuel skid projects. The Silver Instruments OG-I inline oval gear meter works for clean gasoline, diesel, and biofuel blends up to 2000 cP. It needs no straight run. That saves space on a skid. The second option is the Silver Instruments CMF series Coriolis mass flow meter. It measures mass flow and density directly. Use it when the skid needs billing grade accuracy or when gasoline temperature changes a lot.
For a standard 50 mm (DN50) fuel transfer skid, an oval gear meter with 4-20 mA HART output and a local totalizer meets most requirements. For DN25 loading arms, the OG-I model covers 2 to 200 L/min. For DN80 skids, flow ranges go up to 1000 L/min. A customer in Vietnam ordered 12 inline gasoline flow meters for containerized fuel skids last year. They used the OG-I with a PT100 temperature sensor and a batch controller. The setup passed their ATEX audit without changes.
Why Oval Gear Meters Work for Gasoline
Gasoline has low viscosity, typically 0.5 to 0.8 cP at 20 °C. That is thin. It can slip past some meter types. An oval gear meter uses two rotating oval rotors. The rotors trap a fixed volume of liquid. Small clearances reduce slip. Accuracy stays around ±0.5% of reading for clean fuels. For gasoline with no particles, this is a reliable and lower cost choice.
But oval gear meters do not like dirt or water. Always install a strainer upstream. Use a 60 mesh strainer for gasol
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ATEX Pulse Output and Wiring on a Fuel Skid
Most fuel skid controllers need a pulse signal. The Silver Instruments OG-I with an ATEX rated reed switch or Hall effect sensor gives a square wave pulse. You can wire that to a batch controller, PLC, or a truck loading computer. A 4-20 mA HART output is available when the control room needs analog flow rate.
For hazardous area wiring, use an intrinsically safe barrier if the sensor circuit enters Zone 1. Even if the meter body is flameproof, the barrier protects the circuit. That detail matters for EPC contractors in the Middle East and Latin America.
How to Specify an Inline Gasoline Flow Meter
Send us these details. Pipe size in DN. Flow range in L/min or m³/h. Operating pressure in bar. Gasoline temperature range in °C. Power supply on the skid. Hazardous area zone. The output signal your controller accepts. We select the meter and confirm the ATEX certificate number before quotation. This avoids back and forth after order.
A typical request reads: DN50, 80 to 600 L/min, 6 bar, 25 to 35 °C, Zone 1, 24 VDC, pulse output. We respond with a model, drawing, and price in one working day.
FAQ
Which inline gasoline flow meter is best for a fuel transfer skid? The Silver Instruments OG-I oval gear meter suits most clean fuel skids. It is compact, needs no straight pipe, and costs less than a Coriolis meter. For custody transfer or mass measurement, choose the CMF series Coriolis meter.
Does the meter come with an ATEX certificate? Yes. The meter body and sensor carry ATEX certification for Zone 1 or Zone 2. We include the certificate number and marking in the quotation. You can verify it before purchase.
Can the meter handle diesel and gasoline on the same skid? Yes. The OG-I handles both. Keep the flow range within the meter specification. Diesel has higher viscosity, so the meter reads diesel with slightly better low flow accuracy than gasoline.
What output signals are available for fuel skids? Pulse, 4-20 mA, and 4-20 mA HART. The pulse output works for batch control. The 4-20 mA HART works for continuous flow monitoring.
What maintenance does an inline gasoline flow meter need? Clean the upstream strainer every month. Check the rotor movement every six months. Avoid running the pump dry. Gasoline lubricates the rotors. Running dry wears the bearings.
Contact Silver Automation Instruments for a quotation. Send your pressure (bar), temperature (°C), pipe size (DN), and flow range to our engineers. Tel: +86-25-68650347. Whatsapp: +86-25-52155837. WeChat: +86 15365082610.
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