Current position > News detail
『Oil Flow Meter for Tank Truck Loading: Speeding Up Distribution Depot Turnaround』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
Oil Flow Meter for Tank Truck Loading: Speeding Up Distribution Depot Turnaround
Quick Answer: A well chosen oil flow meter cuts tank truck loading time by 12 to 18 minutes per vehicle. Silver Automation Instruments supplies oval gear meters and Coriolis mass flow meters that plug into batch controllers directly, so you stop relying on weighbridges. Send us your oil type, pipe size (DN), flow range and working pressure, and we recommend the correct meter with ATEX or IECEx cert if your depot is in Zone 1.
Why Depot Turnaround Time Matters More Than You Think
Depots in Southeast Asia, Africa and the Middle East often run 24 hour shifts. A single top loading bay handles 40 to 60 trucks per day. When each loading cycle takes 45 minutes instead of 30 minutes, you lose capacity for 6 to 8 extra deliveries daily. Drivers queue for hours. Fuel stations run dry. In practice, the bottleneck is rarely the pump. It is the measurement step: manual dipsticks, old turbine meters that drift after a few months, or weighbridge systems that need two stops per truck. Removing that bottleneck with a direct in line flow meter on the loading arm gives you a repeatable fill time under 2 minutes for a 20 000 litre compartment.
Oval Gear Meters: The Workhorse for Clean Oils and High Viscosity
For diesel, kerosene, light crude and heavy fuel oil up to 500 cP, our oval gear flow meter is the first choice at loading racks. The reason is simple. Oval gear meters trap a fixed volume between two precision gears and displace it. Wear is minimal because the gears float on the oil film. Accuracy stays within 0.2% even after three years of daily use. We have seen this on a customer site in Vietnam where a depot loads 80 trucks per shift with a Silver OGF DN80 oval gear meter. They check the meter every month against a prover tank. Deviation is always below 0.15%. Most engineers skip this part, but the meter keeps its curve because they installed a 60 mesh Y strainer and an air eliminator upstream. Without those, an oval gear meter can overshoot or gum up.
Oval gear meters also handle high flow speed. A DN100 OGF meter runs comfortably at 4000 L/min. The pressure drop is low, around 0.3 bar at 100 cSt. If you load multiple compartments through a single manifold, you can add a preset batch controller like the Silver BC 51. The controller opens the valve, counts pulses from the meter, and shuts off when 19 800 litres hit the target. No driver interaction needed.
Coriolis Mass Flow Meters for Multi Product Depots
Some depots load diesel, gasoline and ethanol blends from the same bay. You cannot risk cross contamination or density errors. A Coriolis mass flow meter like our Silver CMF series solves this. It measures mass flow, density and temperature in one pass. Accuracy is 0.1% of rate. Because it has no moving parts in the flow stream, you do not worry about varnish buildup from ethanol. A depot in Indonesia switched from a double case turbine meter to a Silver CMF DN50 Coriolis meter last year. They now load a 32 000 litre truck in 14 minutes, including the line flush cycle. The meter detects the interface between diesel and flush solvent by density change and signals the controller to close the right valve. Cross contamination dropped to zero. The payback period was under 9 months.
Installation Details That Make or Break Accuracy
Here is the thing: a good meter performs poorly if the piping layout creates air pockets or pulsation. For oval gear meters, always place the air eliminator at the highest point before the meter. Keep the meter fill line and eliminate low spots. If the p
Real Field Numbers from a Silver Instruments Customer
A diesel distribution hub in Malaysia operated by a 50 person SME was loading 35 tank trucks per night using a mechanical counter and a manual valve. Loading took 38 to 50 minutes per truck. Queue time reached 2 hours. We installed a Silver OGF DN80 oval gear meter with a batch controller and a pneumatic shut off valve. The meter was ATEX Zone 1 certified because the loading rack sits in a classified area. After the retrofit, loading time dropped to 24 minutes average. The same pumps, same piping, but automated measurement removed the manual top up step. The depot now loads 52 trucks per shift and drivers clock in 90 minutes less idle time every day. Downtime for maintenance is under 4 hours per year because the meter needs only a simple gear inspection.
How to Pick the Right Meter Size and Output
Do not guess the pipe size. Send us five data points and we will size the meter for your loading bay: oil type and viscosity at operating temperature, minimum and maximum flow rate in L/min or kg/h, working pressure in bar, temperature range, and the hazardous area classification. For a typical diesel loading arm with 2000 L/min peak flow, we often recommend a DN50 oval gear meter. For up to 6000 L/min, a DN80 or DN100 body. If you load LPG or ethane mix, a Coriolis meter with cryogenic rating down to -40 °C fits. All meters come factory calibrated against a master meter traceable to national standards. We also supply a calibration certificate at no extra cost.
FAQ
Can I use the same meter for diesel and gasoline without recalibration? An oval gear meter can handle both if they fall within a similar viscosity band, but you lose a bit of accuracy at very low viscosities. We normally specify a calibration curve for the primary product. A Coriolis meter switches seamlessly because it is mass-based.
What output signal works best with a loading batch controller? A quadrature pulse output or a single 0 to 10 kHz pulse line. Most Silver controllers accept an NPN or PNP pulse directly. 4-20 mA is fine for flow rate display but pulse gives better volume resolution.
How do I prevent air bubbles from affecting the meter count? An in-line air eliminator with a float vent installed 10 pipe diameters upstream. On oval gear meters, we also recommend a back pressure valve after the meter to keep the line full.
Is ATEX Zone 1 certification available for these meters? Yes. Silver oval gear and Coriolis meters carry ATEX, IECEx or EAC certifications. When you request a quote, tell us the exact zone and gas group.
What maintenance does an oval gear meter need at a busy loading rack? Clean the Y strainer every month. Inspect the gears every 18 months. Keep the pulse sensor dry. Spare gear kits are available from our warehouse in Kuala Lumpur and Dubai.
To get a quote with delivery time to your country, write to our sales team with your pressure (bar), temperature (°C), pipe size (DN) and flow range. We ship to 40 plus countries across Southeast Asia, Oceania, Latin America, Africa and the Middle East.