FAQ

Install on a straight pipe section with at least 10D upstream and 5D downstream. For steam, mount horizontally with the meter body above the pipe axis so condensate drains away, and make sure the pipe runs full.

We recommend at least 10 diameters upstream and 5 diameters downstream. When valves, elbows or reducers are close to the meter, add a flow conditioner or extend the straight pipe.

Yes. Our calibration laboratory holds CNAS accreditation (number L10524), which follows international mutual recognition, so certificates are widely accepted by overseas buyers and third-party inspectors.

Typically every 12 months for trade and critical process applications. For less critical lines a 24-month interval is acceptable. Contact us for a calibration reminder plan.

Send us the fluid type, working pressure and temperature, flow range, pipe size and required accuracy. We will recommend the meter family and size within one working day, free of charge.

Yes. Besides standalone meters we build integrated skids with isolation valves, transmitters and flow computers, tested and calibrated before shipment.

Standard sizes ship in 7–20 days depending on model and quantity; large or custom skids need about 30 days. Meters are packed in export wooden cases or reinforced cartons with foam inserts.

Very little. Periodically check the transmitter seal, confirm no debris blocks the bluff body, and compare readings with process conditions. A calibration check every 12–24 months is recommended.

Standard meters are warranted for 12–18 months against manufacturing defects. After expiry, remote setup guidance, spare parts and repair service remain available at cost, with repairs completed within 10 working days.

Yes. Our magnetic and vortex meters offer remote transmitter kits with cable lengths up to 100 m for the magnetic meter coil and 30 m for the vortex pick-up, ideal for confined vaults and high-temperature lines.

Yes, that is the main advantage over inline meters. The transducers clamp onto the outside of the pipe, so installation takes under an hour on a live line, with no cutting, welding or shutdown.

Typical figures: Coriolis ±0.2% of mass flow, electromagnetic ±0.5% of reading, turbine ±0.5–1%, vortex ±1% of flow (steam ±0.9%), clamp-on ultrasonic ±1–2%. Confirm the accuracy in your coffee and project spec.

If the liquid conducts above about 5 µS/cm and the pipe runs full, choose electromagnetic. For hydrocarbons, condensate and non-conductive liquids or saturated steam, choose vortex. Send us the media details and we will decide for you.

Yes. Vortex meters handle both. For saturated steam we support pressure or temperature compensated mass flow, and for superheated steam optional pressure plus temperature compensation for accurate mass flow over a wide turndown.

Yes. Select vortex, Coriolis and DP models are available in Ex d flameproof or Ex ia intrinsic safety versions, with certificates covering Zone 1/2 gas groups IIA–IIC. If you are not sure, we select the protection grade from your zone classification.

Sample orders start from 2 units, and standard MOQ is 10–20 units depending on model. We keep popular sizes in stock, so mixed distributorship orders usually ship within 10 days.

First check for wet steam or liquid slugging on steam duty, then mechanical vibration near the meter, a blocked or coated bluff body, and upstream flow disturbance. We can review your installation drawing and recommend a fix within one working day.

Yes. We stock sensors, electrodes, liners, transmitters and gaskets for the popular range. Repair turnaround is usually 10–15 working days plus shipping, and we issue a calibration certificate after every repair.

Yes. Most of our magnetic, vortex, Coriolis and turbine meters work on vertical risers as long as the flow direction is upward and the pipe runs full. Horizontal meters with upside-down liquid slugs are a common cause of unstable readings, so vertical mounting often helps.

We supply concentric reducers and can size the meter smaller than the line, provided the final velocity stays in the metering range. For pipes above DN600 we usually recommend clamp-on ultrasonic instead of an inline meter for cost.

Three low-cost field checks: compare against a portable clamp-on meter on the same line, cross-check tank fill or truck-load quantities over a known interval, and inspect the zero point on a magnetic meter. If readings diverge, our engineers guide a remote diagnosis.

Accuracy tells you how close the reading is to the true flow; repeatability tells you how consistent the reading is for the same flow. For batching and dosing, repeatability matters most; for custody transfer, both matter. Our certificates list both figures.

For clean water with conductivity above 5 µS/cm, the electromagnetic meter is maintenance-free and immune to wear, while turbine meters give higher response and lower cost for light hydrocarbons. For potable water transfer, electromagnetic is the usual choice.

Yes. Magnetic meters handle hot water up to 180 °C with the right liner; vortex meters measure condensate and feedwater with pressure compensation; Coriolis meters cover high-temperature hygienic duty. Tell us the temperature and pressure to pick the build.

Yes. For commissioning criticals we can split shipments, air-freight a small quantity in 3–5 days and ship the balance by sea. Packaging for air freight uses lightweight reinforced cartons with foam inserts and battery-free transmitters wherever possible.

For natural gas, compressed air and steam, pressure and temperature compensation is strongly recommended, because volumetric readings can drift by 1–2% per bar and per 3 °C. Most Boka transmitters include built-in PT/P& T inputs for compensated mass or standard flow.

Yes. Remote commissioning is included with larger orders, we guide step-by-step setup, zeroing and loop check over video within working hours. We can also provide bilingual operating guides and recorded training for your operators and technicians.

Across the differential-pressure (throttling) family we cover roughly DN10 to DN2000 and larger: orifice plate and balanced (multi-orifice) meters DN15–DN1000+; Venturi DN15–DN2000; V-cone in-line DN15–DN2000, wafer DN15–DN150 and insertion DN150–DN2000+; wedge and rectangular DN15–DN1000 (larger on special order); bent-pipe DN10–DN2000; averaging pitot is an insertion element for large lines. Vortex meters are DN15–DN500 in-line and DN200–DN6000 in insertion form. Thermal gas meters have insertion versions for lines DN80 and above. Magnetic, Coriolis and other series are sized per model. If the line is larger than the meter bore we supply concentric reducers and size the meter below line size, as long as the reduced velocity stays within the meter's measuring range. Tell us your pipe size and flow range and we will confirm the exact bore.

There are nine models in the differential-pressure (throttling) family. BF00 balanced (multi-orifice) flow sensor — high accuracy and very short straight-run requirements. BF01 orifice plate — the classic standard throttling element, up to 64 MPa and 850 °C. BF05 Venturi tube — low permanent pressure loss, friendly to dirty media. BF10 averaging pitot tube — insertion type for large lines, permanent loss only ~3% of the measured ΔP. BF15 nozzle — a first choice for steam and high-temperature duty. BF20 wedge — for high-viscosity and easily crystallizing liquids. BF20R rectangular — a wedge-plus-Venturi hybrid. BF30 V-cone — needs only 0–3D upstream straight pipe. BF35 bent pipe — no additional pressure loss, simply replaces an elbow. Send us the media, pipe size and pressure/temperature and we will recommend the model and size.

We have two ultrasonic models. BF70-1 liquid ultrasonic flow meter works mainly on the transit-time method, with a Doppler version for sewage and particle-laden liquids; BF70-2 gas ultrasonic flow meter is a multi-path design for natural gas, compressed air and flue gas, widely used for gas custody-transfer metering. Both are available as in-line, clamp-on (no pipe cutting, live retrofit) or insertion. Clamp-on adds no pressure loss and is very cost-effective on large bores; note that clamp-on accuracy drops on small bores. Tell us the media and pipe size and we will recommend the model and form.