Buyer guide
How to Specify an Air Header Distribution System for an RFQ
Air header distribution systems organize plant or instrument air supply for pneumatic actuators, valve positioners, analyzers and field instruments. This guide helps buyers prepare a clear RFQ for air headers and instrument air distribution manifolds.
By SNG Services · Updated 1 Oct 2026
Where air headers are used
Air headers are used where multiple pneumatic devices need a clean, organized and isolatable air supply from one common header. They are common in control valve packages, analyzer shelters, instrument racks and plant utility panels.
- Pneumatic actuator and valve positioner supply
- Instrument air distribution around skids and panels
- Analyzer shelter and utility air take-off points
- Maintenance-friendly isolation for multiple outlets
RFQ details buyers should share
The most useful air header enquiry includes outlet count, inlet size, outlet connection, material, valve type, pressure rating, mounting arrangement, drain requirement and quantity. A drawing or photo of the required layout helps reduce clarification cycles.
Selection notes for projects
Specify whether the header is for instrument air, utility air or a special gas service. Confirm NPT, BSP, compression tube or flanged connections early because connection mismatch creates field delays.
Frequently asked questions
What outlet counts are common for air headers?
Outlet count and spacing are project- and manufacturer-dependent. State the required outlet count, spacing and layout in the RFQ, then verify the proposed arrangement against the approved drawing.
What material is used for air header distribution systems?
Material selection depends on the utility service, project specification, corrosion conditions and site environment. State the required material grade in the RFQ and confirm availability and suitability with the supplier.