31VF3A

31VF3A air filter for pneumatic systems

The 31VF3A is an air filter used in pneumatic systems that work with compressed air or gaseous nitrogen. Its task is straightforward: it removes mechanical particles from the working medium before they reach the next units in the circuit. In aircraft and specialized equipment, this kind of filter is normally installed where the pneumatic line needs protection against dust, small solid particles, or contamination carried by the gas flow. It is a small component, but it sits in a place where contamination can quickly affect valves, regulators, fittings, and other downstream parts.

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 31ВФ3А 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 31ВФ3А and 31VF3A.

Product Type: Air filter
Function: Filtration of air and gaseous nitrogen from mechanical contaminants
Application / Where Used: Pneumatic systems of aircraft and specialized equipment
Working Medium: Air, gaseous nitrogen
Filter Element Designation: 320.011
Filtration Fineness: 40 µm
Nominal Operating Pressure: 35 MPa
Maximum Flow Capacity: 45 nl/s
Hydraulic Resistance of Clean Filter: Not more than 0.15 mm H₂O
Operating Temperature Range: −60 to +250 °C
Weight: Not more than 0.17 kg
Scope of Supply: Filter assembly with non-regenerable filter element
Technical Documentation: Air Filter 31VF3A Technical Documentation

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.