Tubeaxial Fans cool electronic military equipment.

Press Release Summary:

Featuring onboard EMI filter and Low Speed Warning Device, Propimax 4 Fans deliver max airflow of 240 cfm, providing ventilation and electronic equipment cooling in military and commercial helicopters as well as other air, ground, and shipboard applications. Impellers run on 2 double shielded stainless steel ball bearings, with integral lubricant reservoir for maintenance-free life. Measuring 3.75 in. in dia x 1.73 in. deep, fans operate from -54 to 85°C and meet MIL-B-23071 specifications.

Original Press Release:

Small Footprint Tubeaxial Fan Delivers High Cooling Performance in Military and Commercial Electronics Applications

AMETEK/Rotron Propimax 4 has onboard EMI filter

A small tubeaxial fan that delivers high performance in severe conditions has been introduced by AMETEK Rotron ( The Propimax 4 provides efficient ventilation and electronic equipment cooling in military and commercial helicopters as well as other air, ground and shipboard applications. It features an onboard electromagnetic interference (EMI) filter and Low Speed Warning Device (LSWD).

The fans deliver maximum airflow of 240 CFM to move cooling air through densely packaged avionics, computers, communications gear, medical devices and other components. Impellers run on two high-precision double shielded stainless steel ball bearings, with an integral lubricant reservoir for long, maintenance-free life. It measures only 9.5 cm (3.75") diameter x 4.4 cm (1.73") deep,

Standard features include speed control, brushless permanent magnet design and transient, over voltage and reverse polarity protection. Operating temperature range is -54° C to 85° C. Available options include a wide range of custom mounting configurations and helicoil inserts.

All Rotron Tubeaxial Fans are finely balanced for long life and are designed to meet the harsh duty requirements of MIL-B-23071 and other applicable military and aerospace specifications.

AMETEK Rotron is a world leader in brushless DC motors, blowers and pumps for aerospace military, mass-transit, medical and computer applications. It is a unit of AMETEK, Inc., a leading global manufacturer of electronic instruments and electromechanical devices with annual sales of US$3 billion.

Product Sales Contact:


Mark Samways

AMETEK Aerospace & Defense

Tel: +55-12-3302-9978


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