Aerox 4110-605-2 Needle Valve with -02 PB2 (Puritan 566) Fitting

The Aerox 4110-605-2 needle valve with fitting is designed to provide precise flow control adjustment of aviation oxygen delivery when connected to a mask or cannula tubing. The brass valve body and barbed outlet facilitate connection to standard oxygen tubing, while the inlet features a PB2 (Puritan 566) style connector for integration into aircraft oxygen systems. This makes it ideal for retrofits or custom oxygen setups requiring variable flow control.

Aerox offers the 4110-605 series with multiple connector types, including PB1 (Puritan 750), PB2 (Puritan 566), Scott, Aerox style, SkyOx, and Military (MS) fittings – the -02 suffix denotes the PB2 fitting. This versatility enables technicians to match the valve directly to the aircraft’s oxygen outlet standard, eliminating the need for adapter plumbing. Selecting the correct fitting at the time of purchase ensures compatibility and avoids costly rework.

The integrated needle control enables technicians or users to manually set the oxygen flow rate with fine adjustment, which is particularly useful when matching individual altitude or cabin-system requirements. Because it supports the variable flow needs of aviation systems, the needle valve helps optimize oxygen consumption, especially in portable or supplemental oxygen setups. Fine flow adjustment contributes to comfort and safety, rather than relying on fixed flow limits.

Yes. The Aerox 4110-605-2 is suitable for both portable oxygen systems and installed aircraft oxygen systems, provided the correct inlet fitting (in this case, PB2) is chosen. Its compact size and barbed tubing connection make it ideal for retrofit installations where space or line routing is restricted. This dual-use capability gives maintenance personnel flexibility when upgrading systems or servicing mixed-fleet oxygen environments.

Technicians should routinely inspect the valve for smooth operation, verify that the needle doesn’t stick or back out unintentionally, check the barbed tubing connection for secure fit and no oxygen leaks, and confirm that the inlet fitting is sealed correctly. It’s also essential to keep the valve body free of oil or contaminants – especially given its use in oxygen delivery systems. Any signs of thread wear or damage to the barbed fitting warrant replacement rather than continued service.

Brass is chosen because it provides excellent corrosion resistance, is highly machinable for precise needle control, and is compatible with high-purity aviator-grade oxygen systems. The brass body ensures reliable and repeatable flow control, as well as a long service life, under demanding aviation conditions. Aerox’s use of brass also meets industry expectations for oxygen-system integrity and performance.

Yes. When installing a barbed fitting, ensure the oxygen tubing seats fully over the barb, secure it with an aviation-grade clamp (if required by the aircraft handbook), and verify no tubing kinks or twists remain. Proper installation prevents leaks and ensures the precise flow set by the needle valve is maintained. Following installation, a leak check with soapy water or approved leak-detection fluid is advisable before flight.

While the valve itself is a non-instrument accessory and does not require calibration, it should be installed according to the aircraft’s oxygen-system requirements, and its part number (4110-605-2) should be documented in the maintenance log. Purchasing from an authorized supplier ensures that you receive traceability documentation and a Certificate of Conformance (CofC) if required. Maintaining accurate records supports airworthiness compliance and ensures readiness for future audits.

Operators should review the aircraft’s supplemental oxygen system manual and note the style of outlet (e.g., PB1, PB2, Scott, etc.). Then match that with the fitting code on the valve (-02 = PB2). Confirm that the barbed outlet is suitable for the tubing size in use and that the valve threads align with the system’s oxygen outlet. If any adapter plumbing is required, consult the system OEM or maintenance manual.

Upgrading to the Aerox 4110-605-2 enables precise manual flow adjustment, replacing fixed-flow-only valves, and provides pilots with better control over their oxygen usage, potentially extending the duration of their cylinders. It also simplifies integration when configuring mixed-fleet aircraft with different outlet standards, thanks to its available connector variations. Improved control and compatibility help operators reduce weight and inventory complexity.