hydraulic oil flow meter DN15

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Hydraulic Oil Flow Meter DN15 for Hydraulic Systems: Oval Gear and Coriolis Choices

Quick Answer: For DN15 pipes, Silver Instruments recommends the SOG15 oval gear flow meter for hydraulic oil up to 400 bar and ISO VG 10 to VG 68 fluids. The meter outputs 4-20 mA or pulse, works with oil temperatures from -30 °C to 120 °C, and comes with aluminum or stainless steel bodies. For low flow rates from 0.5 L/h, we offer Coriolis mass flow meters with ATEX Zone 1 approvals. Tell us your oil type, pressure, and required accuracy for a fast quote.

DN15 is a small pipe size used in hydraulic test benches, lubrication systems, and diesel engine fuel circuits. Engineers often need a reliable flow meter that handles oil viscosity up to 300 cSt. Silver Automation Instruments ships oval gear and Coriolis meters to hydraulic service companies in Indonesia, Brazil, and Saudi Arabia.

Here’s the thing. Hydraulic oil flow measurement is not a one-size-fits-all job. Viscosity changes with temperature, and tiny pipes amplify pressure drop. We have seen customers in Vietnam use turbine meters on ISO VG 32 oil and get readings that drift by 8% when the oil cools down. Oval gear meters do not slip as much under viscous conditions. That is why we suggest the SOG series for hydraulic oil in DN15 lines.

The SOG15 oval gear flow meter handles flow rates from 2 to 120 liters per hour. The standard body is hard anodized aluminum with FKM seals. We also build full stainless steel 316L units for phosphate ester fluids in electrohydraulic control systems. Output options include two-wire 4-20 mA with HART, active pulse, or Namur sensor for hazardous areas. Last year a hydraulic repair shop in Thailand ordered 15 SOG15 meters with PT100 temperature sensors and local LCD displays. They monitor Shell Tellus S2 V 46 oil returns at 50°C and 80 bar.

Some engineers ask us for a Coriolis flow meter on DN15 hydraulic lines. This makes sense if you need mass flow rate in kg/h and density data to check oil condition. Our SMF series mini Coriolis meter mounts directly on a 15 mm tube. It measures flow from 0.5 kg/h to 650 kg/h with accuracy of ±0.2% of rate. The wetted parts are 316L stainless steel, compatible with mineral oil, HFC, and HFD fluids. A marine hydraulics company in Singapore uses the SMF meter to log hydraulic consumption during bollard pull tests on anchor handling tugs. They chose 4-20 mA HART and Modbus RTU to feed data into their vessel automation system.

Pressure rating matters for hydraulic applications. Our standard oval gear meters are rated for 400 bar maximum working pressure, tested with 600 bar burst discs. Coriolis sensors have a 250 bar rating, which covers most industrial hydraulic circuits. We supply meters with DIN 2353 24° cone connectors or SAE J514 O-ring boss ports for leak-free installation. No adapters, no extra leak points.

Do not forget viscosity compensation. Oval gear meters are reasonably immune to viscosity changes above 5 cSt, but for multi-grade hydraulic fluids like ISO VG 46, the s

Because DN15 is a small line, flow conditioning is not needed. Install the meter with a straight run of 5 pipe diameters upstream and 3 downstream. We can supply the meter as a complete package with digital indicator, analog output, and two dry reed pulse switches for totalization. The electronics enclosure meets IP67 and IP68 ratings, suitable for outdoor hydraulic power units in mining or offshore cranes.

So, what about ATEX? We have DN15 oval gear meters certified for ATEX Zone 1 and Zone 2 (Ex II 2G Ex db IIC T6 Gb). These meters use an intrinsically safe NAMUR sensor or an Ex d enclosure. A hydraulic cylinder test bench in Dammam, Saudi Arabia, uses our ATEX oval gear meter to measure oil flow into large actuators at 350 bar. They combine the meter with a pressure transmitter from our range to create a complete test kit.

Frequently Asked Questions About DN15 Hydraulic Oil Flow Meters

What is the best flow meter technology for hydraulic oil in a 1/2 inch pipe?

For most hydraulic oils with viscosity between 10 and 300 cSt, oval gear meters provide stable accuracy and long life. Coriolis meters are better if you need mass flow, density, and oil condition monitoring on a test stand.

Can your DN15 flow meter handle high pressure up to 400 bar?

Yes. Our oval gear meters are rated for 400 bar working pressure with a safety factor of 1.5. We test each meter at 600 bar and include a hydrostatic test certificate.

Do you supply meters with ATEX certification for hydraulic oil in Zone 1 areas?

Yes. We offer ATEX Ex db or Ex ia versions for Zone 1 and Zone 2 environments. Specify your zone and gas group when you request a quote.

What output signals can I get from a DN15 hydraulic oil flow meter?

You can choose 4-20 mA analog with or without HART, pulse output for PLC counter cards, or Modbus RTU via RS485. Coriolis models also support Modbus TCP.

How do I order a flow meter for a specific hydraulic oil like Tellus S3 V 46?

Send us the oil brand, viscosity at 40°C, minimum and maximum flow rate, line pressure, and temperature range. We will select the right body material, seals, and calibration settings. Email your parameters or use the quote form on our hydraulic oil flow meter page.

Tell us your pipe size (DN15 or other), hydraulic oil type, pressure, temperature, and flow range. We ship from our China factory to the Middle East, Southeast Asia, Australia, and South America. Visit flow-meter.com.au for our full range of hydraulic oil flow meter DN15 options.

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