🔥 Get Full Catalog

IP Ratings

IP protection ratings for fans and motors explained, from IP54 to IP66, plus what the rating does not cover in wet, dusty or outdoor installations.

longwell-lwcc-dc300mb-01-proje
By longwell / August 19, 2026 / Engineering Case Studies

Mobile Condenser Cooling on a 26V Truck Bus

Read how this 26V brushless DC condenser fan overcomes dense coil stat...

Read More »
longwell-lwaa6d800s-7myb-15-pr
By longwell / August 18, 2026 / Engineering Case Studies

Harsh Climate Condenser Cooling with an 800mm AC Axial Fan

Learn how we built an 800mm AC axial fan to push 27,089 m3/h at 185 Pa...

Read More »
AC axial fan qualified for vertical and horizontal fan mounting orientation
By longwell / July 30, 2026 / Engineering Case Studies

Shaft Up, Shaft Sideways: the Fan Has to Survive Both

Most specifications never mention which way the fan will point. This o...

Read More »
EC fan wiring interface with power, control and feedback leads
By longwell / July 30, 2026 / Engineering Case Studies

Eight Wires, and Every One of Them Specified

The airflow requirement took one line. The wiring specification took a...

Read More »
A 900mm axial fan re-engineered for 50 Hz to 60 Hz grid conversion
By longwell / July 29, 2026 / Engineering Case Studies

Moving a 900mm Fan From 50 Hz to 60 Hz Is Not a Sticker Change

The customer wanted their proven 50 Hz fan for a 60 Hz market. The imp...

Read More »
A 200mm DC axial fan held under a 1050 gram fan weight limit
By longwell / July 28, 2026 / Engineering Case Studies

The Fan Had a Weight Limit Before It Had an Airflow Target

Airflow, pressure, noise, voltage — every order states those. This one...

Read More »
EC condenser fan entering fan standby mode below the 1.2V threshold
By longwell / July 27, 2026 / Engineering Case Studies

Below 1.2 Volts, This Fan Deliberately Stops

Everyone specifies the top of the control range. The bottom of it — wh...

Read More »
Fan filter kit adapting a 120mm axial fan to a 150mm cabinet cutout
By longwell / July 25, 2026 / Engineering Case Studies

The Cutout Is the Requirement, Not the Fan

The customer asked for a 150mm fan that barely exists. What their cabi...

Read More »
longwell--project-image-05-jpg
By longwell / May 11, 2026 / Engineering Case Studies

The Regulation Chose the Motor Before We Did

We usually explain why EC beat AC on the merits. In this order, the la...

Read More »
Fan terminal block for field wiring on a 310 VDC axial fan
By longwell / May 9, 2026 / Engineering Case Studies

No Flying Leads: Why the Customer Demanded a Terminal Block

Loose wires are fine on a bench. Across a thousand units wired in the ...

Read More »

Recent Comments