31VF3A

31VF3A in air and nitrogen filtration

The filter is used for purification of air and gaseous nitrogen. It does not change pressure, control flow logic, or perform regulation by itself. It only cleans the working medium within the limits set by its filter element. In a pneumatic circuit, this matters because mechanical particles can damage sealing surfaces, block small passages, or disturb the operation of precision pneumatic equipment. The 31VF3A provides a fixed filtration function and works continuously while the medium passes through the filter body.

Pneumatic circuit protection with 31VF3A

In operation, the 31VF3A is installed as part of the pneumatic line and protects equipment installed after it. These may include valves, pressure reducers, distribution units, actuators, gauges, and pipe fittings. If the filter element becomes contaminated, the resistance of the filter can increase, so maintenance should follow the technical documentation for the specific installation. The filter is supplied as an assembly with a non-regenerable filter element, which means the filter element is not intended for repeated cleaning and reuse after service limit is reached.

Aircraft and equipment use of filter 31VF3A

The 31VF3A is suitable for pneumatic systems used on aircraft and specialized equipment where the working medium is air or gaseous nitrogen. Such systems may be exposed to wide temperature ranges, pressure changes, vibration, and long storage periods between maintenance events. The exact installation depends on the equipment design and the pneumatic schematic. For aircraft use, the part number should be checked against the parts catalog, maintenance manual, or system diagram before supply. The same filter type may be listed under Latin and Cyrillic designations.

Identification and ordering of 31VF3A

Before ordering, the marking on the filter should be compared with the equipment documentation. The filter may appear as 31VF3A in Latin script or as 31VF3A in Cyrillic script. These designations refer to the same product type, but the installed item should still be checked by documentation and, where possible, by a photo of the data plate or marking. It is also useful to confirm whether the request is for the complete filter assembly or for information related to the filter element designation 320.011. The product is also known under alternative designations 31VF3A and 31VF3A.

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Aircraft application: Documented applications include the An-124 aircraft. Confirm the exact installation against the aircraft maintenance documentation and the complete part marking.