Current position > Product detail
『hydraulic oil flow meter DN150』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)
```html
Quick Answer: DN150 Hydraulic Oil Flow Meter
For a DN150 hydraulic oil line, the most practical and cost effective solution is an oval gear flow meter or a vortex flow meter. Electromagnetic flow meters will not work here because hydraulic oil is non conductive. Silver Automation Instruments supplies DN150 oval gear meters with 4-20 mA HART output, ±0.5% accuracy, and pressure ratings up to PN40 for hydraulic power units, test benches, and heavy machinery lubrication circuits.
Why Hydraulic Oil Measurement on DN150 Lines Demands the Right Meter
Hydraulic oil is not a single fluid. It ranges from ISO VG 22 spindle oil with low viscosity to ISO VG 68 or even VG 100 anti wear hydraulic oil that stays thick at cold start. A DN150 pipe typically carries a flow between 400 and 3000 L/min in a large hydraulic system, such as a metal stamping press or a marine steering gear set. Here is the thing: if you pick a flow meter just by looking at the pipe size, you will get poor low flow reading or a permanent pressure drop that costs you energy every hour.
We have seen this on customer sites many times. A hydraulic pack manufacturer in Vietnam chose a turbine meter for their DN150 return line. At idle flow, the meter simply stopped turning. They replaced it with one of our DN150 oval gear flow meters and got steady pulses down to 60 L/min.
Oval Gear Meter for DN150 Hydraulic Oil: How It Handles Viscosity and Pressure
Positive displacement oval gear meters are the strongest option for hydraulic oil for one simple reason: they do not need conductive fluid or a fully developed turbulent profile. Two oval gears rotate inside a precision chamber, trapping a fixed volume per revolution. That volume stays accurate even when viscosity shifts from 20 cP to 400 cP as the oil warms up.
Our Silver Instruments oval gear meter in DN150 size comes with a carbon steel or cast iron body and can be ordered with 316L gears for fire resistant phosphate ester fluids. The standard flow range for DN150 is 200 to 3000 L/min, with an accuracy of ±0.5% of reading. Output options include a raw pulse, a scaled 4-20 mA signal, or HART protocol. For hydraulic presses in ATEX Zone 1, we build the meter with an Ex d enclosure and PT100 temperature compensation. The flanges are drilled to ANSI 150, 300, or DIN PN16 / PN40, matching your hydraulic piping.
Vortex Flow Meter as a Low Maintenance DN150 Alternative
Some hydraulic circuits want no moving parts. A vortex flow meter with a DN150 wafer or flanged body gives you a full bore design with a single bluff body. It works well with clean hydraulic oil above a certain Reynolds number. In practice, if your minimum flow never drops below 10% of the meter’s upper range and your oil viscosity stays below 30 cSt at operating temperature, vortex is a good fit. We often install a vortex meter with an integrated temperature sensor and a local display for ship hydraulic systems where a technician needs to see the flow right at the meter. The 4-20 mA signal goes to the PLC, and the pulse output feeds a remote totalizer.
What We Deliver with Every DN150 Hydraulic Oil Flow Meter from Silver Instruments
Every meter we ship for hydraulic oil includes a factory calibration certificate with 5 point calibration on actual oil, not water. Because mineral oil calibration gives you a different K factor than water calibration does. We also weld a pressure test plug in the meter body and hydrotest each unit at 1.5 times the rated flange pressure.
You pick the connection standard, the wetted material, the output signal, an
Installation Advice for a DN150 Hydraulic Flow Meter
Most engineers skip this part, but vertical mounting with flow upward keeps the measuring chamber liquid full at all times. That matters for accuracy when the pump starts and stops frequently. A straight run is not mandatory for an oval gear meter, but we still recommend 5 DN upstream and 3 DN downstream just to keep the velocity profile stable. Install a Y strainer 40 mesh minimum upstream if your oil may carry any particulate from pump wear. Change the strainer basket every 500 operating hours. This one habit prevents 90 percent of meter damage we see in the field.
A Direct Example from a Hydraulic Test Bench in Thailand
Last year a customer in Chonburi, Thailand asked us to replace a worn out flow meter on their DN150 hydraulic cylinder test rig. Fluid: ISO VG 46 anti wear hydraulic oil. Operating pressure: 215 bar. Flow range: 200 to 2200 L/min. Ambient temperature: 35 C but oil temperature reaches 70 C during continuous testing. We supplied a DN150 oval gear flow meter with a high temperature rated pickup, 4-20 mA HART output, and PN40 316 stainless steel flanges. The meter has been logging data to their SCADA for 14 months with no deviation outside 0.6 percent as verified by a master Coriolis meter once a month. That is the kind of field result we build for.
Send Us Your Hydraulic Oil Flow Specs for a DN150 Quote
Tell us your operating pressure in bar, oil temperature in C, viscosity grade, and minimum and maximum flow rate in L/min. Include your pipe material and flange standard. We will return a proposal with a specific model number, delivery time, and price for a DN150 hydraulic oil flow meter that fits without oversizing. Email your details to our sales team or use the inquiry form on our site. We typically respond inside one working day with technical selection data, not a generic brochure.
FAQ: DN150 Hydraulic Oil Flow Meter
Can a DN150 electromagnetic flow meter measure hydraulic oil?
No. Hydraulic oil has extremely low conductivity, often below 1 µS/cm. Electromagnetic meters require a minimum conductivity of 5 µS/cm. For oil, switch to an oval gear or vortex meter.
What is the maximum flow rate for a DN150 oval gear meter on hydraulic oil?
Our standard DN150 oval gear meter handles up to 3000 L/min. Custom units with larger clearance can be built for 4000 L/min if your oil is clean and the working pressure allows it.
Can I use the same DN150 meter for hydraulic oil and water glycol fire resistant fluid?
Yes, but you must specify the wetted materials. Water glycol demands 316L internals and a special seal. Standard carbon steel is for mineral hydraulic oil only. We build to match the fluid.
Which output signal do you recommend for a remote monitoring setup?
4-20 mA HART gives you flow rate plus the ability to read temperature and totalizer data from a single pair of wires. Most plant engineers add a local pulse output for a panel totalizer as a backup.
Does Silver Instruments offer Ex proof DN150 flow meters for hydraulic oil?
Yes. We supply oval gear meters with ATEX and IECEx certified transmitters for Zone 1 and Zone 2. Ex d flameproof or Ex ia intrinsic safety models are available depending on your area classification.