LWBE3G250-102NS-37 Industrial Fan LONGWELL Factory EC

Specifications

Compatibility & fitment guide

How to identify the correct unit: locate the reference number stamped on your original component or in the vehicle parts catalogue, then cross-check it against the number below before ordering. Trim and market variants exist for many applications, so the short check is worth the minute before checkout.

How to identify & confirm fitment in 4 steps

1. Locate the OE / reference number on your old part or in the vehicle parts catalogue.
2. Match it to LWBE3G250-102NS-37 shown on this page.
3. Send your VIN and engine code plate so our team runs an exact-fit check.
4. Receive fitment confirmation before we dispatch your order.

Cross-reference coverage for lwbe3g250-102ns-37 industrial fan and industrial fan fitment is listed above; confirm your VIN before ordering.

Product overview

A direct-fit compatible replacement referenced by LWBE3G250-102NS-37 for the applications listed in the fitment block.

Why this unit sells

Buyers searching longwell fan and commercial kitchen exhaust fan look for the strengths listed here: direct fit, verified reference and wholesale packing.

Build & materials

Built to the original equipment drawing, the Industrial Fan uses Steel Iron Metal Iron Aluminum AlloySteel CarbonSteel Magnesium-Aluminum Alloy PlatedSteel and follows the same inspection checkpoints as the reference sample. Tolerances that affect installation are held to the drawing rather than adjusted on the bench.

• Steel Iron Metal Iron Aluminum AlloySteel CarbonSteel Magnesium-Aluminum Alloy PlatedSteel construction for daily and workshop use.
• Surface treated to resist corrosion in road and workshop conditions.
• Dimensional check against the reference sample before packing.

Material and build choices answer the most common industrial fan replacement and industrial fan guide questions from workshop buyers.

Applications & use cases

The fitment block above lists the markets and model families this reference is stocked for, so buyers can match demand without re-checking every listing.

Engineering notes

Application context. A 250 mm EC fan fails differently from an AC fan, and diagnosis should start there. There is no start capacitor to test: the electronics are integrated, so a completely dead motor with supply present usually means internal driver failure, while slow or surging running with a controller attached points to the 0-10V or PWM signal, not the motor. LONGWELL documents locked-rotor and reverse polarity protection on this platform, so a seized impeller or swapped supply wires shut the unit down instead of burning it. Grinding noise still means bearings; constant tach signal loss can mimic a speed fault.

Application context. Installation is as much about the control wiring as the mounting. Bolt the flange square to its frame so the impeller has even tip clearance, and route the 0-10VDC or PWM control pair away from power cables to keep noise out of the speed signal; LONGWELL documents a tachometer output for closed-loop speed monitoring in building automation. Confirm supply voltage and polarity before first energization, since the platform documents reverse-polarity shutdown. For equipment integration, commission the control card at minimum speed first and verify the fan obeys the full signal span.

Application context. Maintenance on this class is mostly airflow hygiene. There are no capacitors to age-test and the ball bearings are documented as maintenance-free, so the working items are dust and heat: keep the impeller and guard clean because buildup unbalances a small rotor quickly, and keep ambient within the documented EC platform envelope, which LONGWELL lists at -25C to +60C for axial models. Check terminal tightness and the control connector annually. If a unit is replaced, record its speed grade and suffix, because LONGWELL's series share a platform across suction and blowing variants.

Application context. Against an AC fan of the same 250 mm frame, the EC version costs more up front but LONGWELL documents 30 to 55 percent lower energy use, which compounds quickly in equipment that runs around the clock. The control advantage is decisive for OEM buyers: stepless 0-10V/PWM speed adjustment, tach feedback, and soft start simply do not exist on a plain AC motor without extra hardware. Against other EC brands, LONGWELL positions this family as a cross-reference to ebm-papst and Ziehl-Abegg size classes, so comparing airflow, static pressure, and noise curves at the same duty point is the fair test.

Field note. On standards context, LONGWELL documents CE, RoHS, and ETL marks across its EC axial range, ISO registration for the factory, and ingress protection grades from IP42 to IP55 depending on model, so the buyer's job is to match the marked IP rating to the actual mounting environment. The 250 mm class is a component for air handling units, electronics enclosures, and machinery cooling rather than a whole-room ventilator, and there is no documented basis to claim clean-room or smoke-control approval for it; those duties require specifically certified products.

Field note. The documented buyer is an OEM design engineer or panel builder integrating cooling into air handling units, control cabinets, refrigeration condensers, or data-rack enclosures, plus industrial distributors supplying MRO stock for the same. What they buy is a controlled, feedback-capable airflow component, not a shop fan: they care about the performance curve, control input compatibility with their PLC or thermostat, and service life figures. LONGWELL documents L10 bearing life data and 40,000-hour class ratings on EC models, which is the kind of number this persona puts into equipment specs.

Deep dive. EC machines remove the capacitor from the wear-parts list and replace it with electronics. Here the service items are the maintenance-free ball bearings, the encapsulated end-cap seal that keeps moisture out of the control PCB, and the external control box or signal wiring that feeds the 0-10V, PWM, or RS485 input. Bearings are sealed for life, so schedule replacement around rising vibration or current draw. When a fan comes out for bearing work, re-torque the bracket, check connector corrosion, and verify the RS485 bus terminations at the same time, because failures blamed on the fan are often failures in the control loop.

Field note. This is a compact component, roughly a 25 by 25 by 11 carton, but the packaging discipline still matters because the impeller is nylon with glass fiber. That material is tough yet can creep if stored under a point load or against a hot radiator, so keep cartons flat, away from heat sources, and never stack heavy stock on top. The inlet ring is the most deformation-sensitive feature; a dinged ring shows up as a change in tone at full speed. Store within the rated minus 25 to plus 60 deg C window, and leave units in anti-static wrapping so the exposed PCB stays protected until installation.

Application context. Commissioning an EC centrifugal on a bracket needs instruments, not muscle. Assemble a multimeter with DC range for the 0-10V signal, a PWM source or the host controller's test output, and a true-RMS clamp meter to log current at each commanded speed. Mechanical prep means M-size fasteners matched to the bracket holes, thread-locker where vibration is present, and a check that the mounting surface is flat so the housing is not pulled out of true. Because this model talks RS485 in many systems, keep a USB-to-RS485 adapter and the register map on the laptop before first power-up; troubleshooting blind wastes a commissioning window.

Field note. Rated from minus 25 to plus 60 deg C with IP55 sealing, this fan tolerates cold sheds and damp exhaust duties better than open AC motors, but humid, dusty air still sets the maintenance agenda. Glass-fiber-filled nylon impellers resist moisture uptake, yet dust bakes onto the blades at 3500 rpm and gradually erodes the pressure head the downstream filter sees; inspect the wheel whenever filter differential pressure is serviced. The encapsulated end cap resists splash, though cable glands and the RS485 terminals stay the weak points in wash-down zones. In winter, cold-soaked bearings start stiff; a brief ramped start via the 0-10V input avoids hard hammering.

Technical background. Ordering these in quantity is a document exercise as much as a purchase. Tie the purchase order to a specific revision of the performance curve and the mounting drawing, because the 250mm family spans many impeller and speed variants under similar codes. Require per-batch certificates covering CE, ETL or UL marks for the 230V version, RoHS declarations, and a sample-based functional test logging speed, current, and noise at rated voltage. Ask that each carton carry a batch code traceable to the winding and PCB lot. Insist on incoming sampling where the 0-10V ramp and RS485 response are exercised, not just a spin test at full voltage.

Technical background. The adaptation traps concentrate at the duty point and the electrical interface. Published maxima like 1067 Pa static and full airflow never occur together; select against the fan curve at your real filter loading, or the installed unit will under-deliver. Voltage labeling also varies inside the LONGWELL EC range, with 110, 230, 380, and 400V inputs offered across the family, so match the nameplate to your panel rather than assuming 230V. Mechanically, the bracket, inlet-ring diameter, and terminal position must be checked against the drawing before treating any unit as a drop-in for an existing 250mm housing, and control hardware must accept the same signal mode you plan to drive.

Workshop note. Documented LONGWELL EC axial build details include insulation class F, S1 continuous duty, maintenance-free ball bearings, die-cast aluminum housing, and 50/60 Hz supply.

Application note. In this diameter class, LONGWELL documents low-noise EC variants around 52-67 dB(A) with airflow in the several-thousand m3/h range, depending on speed grade.

Workshop note. The model code follows LONGWELL's EC axial family convention (LWAE3G450, LWAE3G630, LWAE3G800…) where the numeral denotes impeller diameter, placing this unit in the compact 250 mm class.

Supply note. EC means an electronically commutated brushless DC motor with integrated drive electronics, the platform on which LONGWELL documents 30-55% energy savings versus same-size AC axial fans.

Workshop note. LONGWELL's EC axial platform is documented with 0-10VDC and PWM speed control inputs plus a tachometer output, and protections including locked-rotor, reverse polarity, over-voltage, and soft start.

The engineering notes above compile verified reference, material and application data for aftermarket industrial fan and compatible industrial fan.

Quality & authority

Inspection runs on an AQL sampling plan: incoming material, in-process checkpoints and a final release check are recorded on the batch sheet. Certification on file: UL/ETL/CE//GS.

Warranty & support

12 Months limited warranty against manufacturing defects. Coverage applies to correctly installed units; keep the batch date code so any claim is processed against its inspection record. Motor, ducting and impeller questions are answered by our team before dispatch.

Why buyers pick Vidishi Auto

Industrial Fan — Industrial Fan. Supplied under Vidishi Auto with batch traceability and trade-grade packing; volume pricing and private-label options are available on request. Centrifugal and axial industrial fans are supplied for ducted ventilation and process-air programs.

Logistics & packing

We ship worldwide to distributors and garages from China, Dongguan. Each Industrial Fan is packed in a single-unit export carton. Fans ship with inlets and outlets blanked to keep the impeller and housing clean. Tracked air or sea freight is arranged per order volume.

Bulk quantities of wholesale industrial fan, industrial fan supplier and industrial fan price ship in mixed containers from China, Dongguan.

Mixed-container programs for industrial fan bulk order are arranged per order volume.

Cross-reference numbers

Catalog numbering for this Industrial Fan: the primary reference is LWBE3G250-102NS-37. When a supplier catalog lists superseded or regional formats, match on the numeric core of the code rather than the prefix, then confirm the physical fit.

Catalog cross-references for industrial fan catalog resolve to LWBE3G250-102NS-37.

Frequently asked questions

Further greenhouse ventilation fan questions are answered by the trade desk within one business day.

Compliance disclaimer

Vidishi Auto is an independent supplier. This is an aftermarket compatible replacement, not a genuine OEM part. Brand names are trademarks of their respective owners and are used only to identify fitment.

Duty point & motor notes

Ducted fans are matched to the system duty point; the configuration scope below is confirmed before dispatch.

Installation and service notes for oem industrial fan, industrial fan rental home depot and rent industrial fan home depot are confirmed by our technical team before dispatch.

• Pre-dispatch checks: Steel Iron Metal Iron Aluminum AlloySteel CarbonSteel Magnesium-Aluminum Alloy PlatedSteel construction is verified against the reference sample before packing.
• Airflow and static-pressure duty are confirmed against your duct plan before dispatch.

Workshop teams comparing industrial fan near me, industrial fan cross reference and how to confirm industrial fan fitment receive the pre-dispatch checklist with the quotation.

• Motor voltage, phase and speed data follow the published listing.

Installation and service notes for factory ec, 110-270v fan and aluminum alloy blade fan are confirmed by our technical team before dispatch.

• Inlets and outlets ship blanked to keep the impeller and housing clean.

Workshop teams comparing high pressure centrifugal fan receive the pre-dispatch checklist with the quotation.

Impeller & housing notes

Impeller and housing selection decides system efficiency; the scope below is confirmed before dispatch.

• Configuration checks: the supplied configuration is confirmed against your order before dispatch.

Configuration and service notes for home depot industrial fans, industrial fans at harbor freight and industrial fans home depot are confirmed by our technical team before dispatch.

• Impeller type and blade material follow the published listing.
• Housing material and inlet/outlet orientation are confirmed with the quotation.

Workshop teams comparing what is a industrial fan, 250mm and ec backward fan receive the configuration checklist with the quotation.

• Access doors and drain points are quoted where the listing offers them.

Configuration and service notes for backward centrifugal fan are confirmed by our technical team before dispatch.