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Used Hydraulic Flow Meter for Sale: Secondary Market Sourcing Frameworks
Quick Answer: A used hydraulic flow meter for sale can cut upfront cost on hydraulic power units when you verify fluid viscosity, pressure rating, output type, and calibration history before payment. For most hydraulic oil applications, a positive displacement or turbine meter with 4-20 mA HART or pulse output works from DN10 to DN50. This secondary market sourcing framework helps compare used and new options before you spend money. Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range for a comparison quote.
Start with fluid and load profile, not price
Hydraulic oil viscosity changes with temperature. A meter that reads well at 20 cSt may be unusable at 68 cSt. Before you contact a seller, write down the oil type, ISO VG grade, normal temperature, maximum temperature, and flow range in L/min.
Common field data from our customers includes mineral oil ISO VG 32 at 40°C, 0.5 to 80 L/min, 160 bar working pressure, DN15 BSPP ports, and a 4-20 mA output. Marine steering gear jobs often specify 0.2 to 60 L/min, ISO VG 68, 250 bar pressure spikes, and pulse output for a valve test console.
Used market meter types for hydraulic oil
Positive displacement oval gear and gear flow meters appear most often in hydraulic test benches. They handle high viscosity oil and low flow better than turbine meters. Turbine meters are common for low viscosity hydraulic fluids or phosphate ester fluids in power generation. Thermal mass and Coriolis meters rarely appear in used hydraulic listings because fewer hydraulic systems use them.
Check the approved fluid and seal material. Nitrile seals suit mineral oil. FKM seals cover higher temperatures. EPDM seals may fail with petroleum oil. PTFE seals work with phosphate ester. A meter from a food plant may have stainless steel internals and an EPDM seal set. That combination is wrong for a mining hydraulic power pack.
What to verify before you send payment
Request photos of the inlet, outlet, serial plate, display, and terminal block. Ask for a video with the meter powered and the rotor or gear set moving. Here is the thing. Photos of the outside are not enough. Most engineers skip this part, and then the meter arrives with a dead display or a missing amplifier board.
Ask the seller for the K-factor or pulses per litre. If the seller cannot provide this value, the meter may be useless for a PLC totalizer. Confirm the output. Many hydraulic flow meters have a 4-20 mA HART output, a pulse output, or both. Check the power supply. Some older units need 24 VDC while others need 115 VAC or 230 VAC. Check the thread type too. BSPP, BSPT, NPT, SAE and DIN flanges all appear. A DN20 BSPP meter will not seal correctly on an SAE split flange port without adapters. If the installation is ATEX Zone 1, check the used meter certificate and gas group before purchase.
Calibration, damage and hidden costs
Used hydraulic flow meters often lose accuracy because of contamination, wear, or a previous owner changing the oil. Ask for the latest calibration certificate. A certificate older than 12 months may not help. If the meter has a local display, check for dead pixels or a damaged membrane keypad. Replacement displays for older European and Japanese meters can cost more than the meter itself.
On positive displacement meters, inspect the gear chamber for scratches. Debris from a failed pump can score the measuring chamber and make low flow readings unstable. At 0.5 L/min, a scratched oval gear meter may read 20 percent high or stop entirely. A new meter with a factory K-factor avoids this gamble.
Last year a customer in Vietnam asked us about a used hydraulic flow meter for a test bench running ISO VG 46 oil at 45°C. The meter was built for diesel fuel. Calibration drifted wi
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Regional supply patterns
Southeast Asia and the Middle East have a steady supply of used hydraulic flow meters from decommissioned plastic injection machines, die casting cells, and marine service equipment. Buyers in Malaysia, Thailand, Indonesia, and Vietnam often find units removed from Japanese or European machines. Latin America has less supply and higher shipping cost. Buyers in Peru, Chile, and Colombia should compare a used quote carefully against a new meter from China.
Africa and Oceania create different challenges. Freight and inspection fees eat into the used price. A buyer in Ghana looking for a used hydraulic flow meter for a jacking system paid USD 180 for the meter and USD 260 for shipping plus inspection. The meter arrived without a display cable. Silver Automation Instruments supplied a new pulse output meter for USD 310 with a 12 month warranty and DHL shipping included. The used option was not cheaper in the end.
Compare total landed cost before you commit
Price is not the same as landed cost. Add freight, import duty, inspection, missing cable replacement, and calibration. For a used hydraulic flow meter, a fair target is 50 percent or less of the new meter price when condition is confirmed. If the used price is 70 percent of new, buy new. The warranty, support, and factory calibration tip the decision.
Silver Automation Instruments sells new oval gear, turbine, electromagnetic, and Coriolis flow meters for hydraulic oil, lubrication oil, fuel, and water glycol service. We help buyers compare a used listing against a new meter with the same process conditions. Send us your pressure (bar), temperature (°C), pipe size (DN), flow range, and output preference. We respond with a selection and price.
Contact Silver Automation Instruments at Tel: +86-135-1213-1526. Whatsapp: 86-135-12131526. WeChat: +86 13512131526.
FAQ: Five key questions on used hydraulic flow meters
1. Can a used hydraulic flow meter be recalibrated for a different oil?
It depends on the wetted parts and the meter type. A positive displacement meter can be recalibrated if the oil viscosity is within the original design range. A turbine meter may need a new K-factor. Always ask for the OEM model code and the calibration range.
2. What flow range should I specify for a hydraulic test bench?
Give the minimum and maximum flow in L/min. A typical test bench for mobile valves needs 0.5 to 100 L/min. A power pack for pressing may need 1 to 300 L/min. Do not select a meter based on pump displacement alone.
3. Which output is better for hydraulic power units, pulse or 4-20 mA?
Pulse works well for totalizing volume in a PLC. 4-20 mA HART gives real time flow rate and works with most industrial control systems. Many hydraulic applications use both via a single meter with dual output.
4. How do I check that a used hydraulic flow meter was not damaged internally?
Ask for a video of the meter passing a known volume and a photo of the inlet mesh. If the mesh is missing or deformed, the meter may have ingested metal particles. Request a calibration certificate or a bench test report from the seller.
5. Should I buy used or new for a hydraulic oil flow meter?
If the used price after freight and inspection is above 60 percent of new, buy new. If the meter is critical for warranty testing or safety, buy new. Used meters suit spare part stock, non critical monitoring, or internal test benches with low volume.
For a new hydraulic oil flow meter quote or a comparison against a used meter listing, contact Silver Automation Instruments. Tel: +86-135-1213-1526. Whatsapp: 86-135-12131526. WeChat: +86 13512131526.
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