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Palm Oil Flow Meter DN15: Core Sampling Rules for the Milling Process
Quick Answer: For palm oil core sampling in the milling process, a DN15 oval gear flow meter or a DN15 Coriolis mass flow meter gives repeatable accuracy with crude palm oil (CPO) at 80 °C and 20 cP. Silver Automation Instruments supplies meters with ATEX, 4-20 mA HART, and pulse output. Send your pressure, temperature, pipe size, and flow range to get a specific quote within one working day.
Why DN15 Size Is Common in Palm Oil Core Sampling
A typical palm oil mill in Indonesia or Malaysia runs a core sampling loop after the screw press or the clarification tank. The line takes a side stream of about 200 to 500 litres per hour for laboratory analysis. A DN15 flow meter fits this small pipe exactly. You do not need reducers. The installation remains compact and easy to clean. Because the sample line is small, small bore meters like DN15 oval gear meters avoid dead volume and reduce product waste.
In practice, mill engineers prefer DN15 because most sample piping already uses ½ inch stainless tubing. You can clamp the meter directly into the line without welding. This speeds up commissioning.
Core Sampling Rules That Prevent Meter Failure
We have seen many meters fail on palm oil sample lines because the user skipped basic rules. Here are the rules we share with every client.
Rule 1: Install a strainer or Y-filter upstream. Even core sample streams carry fine solids, fibre, and sand. A 300-micron mesh filter stops debris without adding significant pressure drop. You can clean the filter once a week during routine sampling.
Rule 2: Keep the meter full at all times. Oval gear and Coriolis meters need a liquid-filled measuring chamber. Mount the meter at a low point in the sample loop. Avoid air pockets after steam cleaning cycles. If the plant uses steam blowdown, vent the line before starting the meter.
Rule 3: Maintain temperature below 120 °C for oval gear meters. CPO typically reaches 80 to 90 °C. Standard oval gear meters with PPS gears and PTFE seals handle up to 120 °C. If your cleaning cycle exceeds this, switch to a Coriolis meter with all stainless steel wetted parts.
Rule 4: Select the right pulse or 4-20 mA HART output. Most local PLC systems in Southeast Asian mills accept pulse signals for totalisation. Newer mills in East Africa and Latin America often request 4-20 mA with HART for remote diagnostics. Silver Instruments offers both, including ATEX Zone 1 and Zone 2 approvals.
Oval Gear or Coriolis? A Practical Comparison for CPO Sampling
Here is the thing. Oval gear flow meters cost less and give direct volume readings in litres per hour. They work well for filtered CPO with viscosity from 10 to 500 cP. Silver Instruments model OGF-SS with 316L body and PPS gears costs around USD 1,200 for a DN15 version. It needs little maintenance except gear replacement after 3 to 5 years of heavy use.
Coriolis mass flow meters measure mass flow in kg/h directly. They also give density and temperature, which helps laboratory reconciliation. Model U-025 DN15 from Silver Instruments handles pressures up to 100 bar, temperatures up to 150 °C, and h
We recommend oval gear for standard core sampling where price matters and a monthly filter check exists. Choose Coriolis if you need mass flow for custody or quality calculations, or if upstream filtration is difficult.
Real Numbers from a Palm Oil Mill Application
Last month, a customer in Medan, North Sumatra, asked for a DN15 flow meter to replace a turbine meter on their core sampler. Their sample flow was 350 L/h of CPO at 82 °C, pressure 3 bar, viscosity 18 cP. The turbine meter had jammed after three weeks because of fine pulp carryover. We supplied an oval gear meter OGF-SS-15 with an integrated Y-filter. The mill engineer reported zero issues after six months. They now log daily sample volume directly to their DCS via 4-20 mA HART.
In a different case, a palm kernel oil processor in Ghana needed a DN15 Coriolis because they wanted mass flow in kg/h and online density for product consistency. Their sample pressure was only 1.2 bar, so we configured the U-025 with low pressure loss.
How to Request a Quote for Your DN15 Core Sampling Meter
When you send an inquiry, include these five data points. Fluid type, for example crude palm oil or palm kernel oil. Flow range, such as 200 to 600 L/h. Operating temperature, usually 80 to 90 °C. Operating pressure, often 2 to 6 bar. And required output, like pulse, 4-20 mA, or HART. Also tell us if you need ATEX Zone 1, IECEx, or non-hazardous area approval.
Send your pressure (bar), temperature (°C), pipe size (DN), and flow range to [email protected]. Our team will propose two suitable models and send a PDF quote within hours.
FAQ: Palm Oil Core Sampling Flow Meters
Can a magnetic flow meter measure palm oil? No. Palm oil has very low electrical conductivity, typically below 0.1 µS/cm. Magnetic flow meters need a minimum of 5 µS/cm. You must use a volumetric positive displacement meter or a Coriolis mass meter.
Does a DN15 oval gear meter handle solids? It does not. You need an upstream filter. If solids are unavoidable and you cannot install a filter, a Coriolis meter is the safer choice because it has no gears that can seize.
Which certifications are common for palm oil mills? Most mills in Southeast Asia require ATEX Zone 2 or IECEx Zone 2 for areas around the screw press. Sometimes Zone 1 is needed for solvent extraction areas. Silver Instruments can supply meters with ATEX, IECEx, and cCSAus certifications.
What is the minimum measurable flow for a DN15 oval gear meter on CPO? Typically 5 litres per hour. The meter can also measure up to 600 L/h, giving a wide turndown ratio of 120:1.
Can I get a local display and remote totaliser? Yes. We offer a built-in LCD display with push buttons for local batch total and a remote totaliser via open collector pulse output. Most customers use the 4-20 mA signal to connect to the plant SCADA.
Contact Silver Automation Instruments at https://flow-meter.com.au or reach our support team on WhatsApp for a same-day response.