9” Check Valve Repair & Overhaul
FAA & EASA certified 9” check valve repair and overhaul.
About the 9” Check Valve
A 9-inch check valve is a large-diameter, passive one-way valve in the pneumatic and air management system that allows airflow in a single direction through major bleed or distribution ducting while blocking reverse flow, preventing cross-bleed and protecting upstream sources during reverse-pressure conditions. Forward pressure unseats a flapper or split-disc element, and reverse pressure plus spring force reseats it to seal the line. Its large size and continuous exposure to hot, pulsating, high-volume airflow make it prone to seat and flapper wear or erosion causing reverse leakage, hinge-pin and bushing wear, spring fatigue altering reseat behavior, corrosion and contamination causing sticking, and fretting of sealing faces. These conditions drive leak and functional testing, seat and hinge repair, spring replacement, and overhaul.
Our 9” Check Valve Repair Capability
QTC repairs and overhauls 9” check valve components to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our engineers — including former OEM pneumatic & air management specialists — perform teardown, inspection, cleaning, component replacement, functional and leak testing, and certification, and develop repairs for rejected and beyond-economic-repair (BER) hardware.
All 9” Check Valve Parts We Service
Click a part number for repair details and to request a quote.
| Part number | Make | Model |
|---|---|---|
| 3202122-1 | Boeing | 767 |
Frequently Asked Questions
Does QTC repair 9” check valve components?
Yes. QTC repairs and overhauls 9” check valve components under our FAA & EASA Part 145 approvals. Our catalog lists 1 9” check valve part number. Request a quote to confirm capability and turnaround.
What aircraft use the 9” check valve?
In our catalog, 9” check valve part numbers appear on Boeing. See the full parts list below.
What is involved in 9” check valve repair and overhaul?
Our process typically includes incoming inspection, disassembly, cleaning, non-destructive evaluation, repair or replacement of worn elements, functional/leak testing, and certification with the appropriate airworthiness release.
Request a Quote for 9” Check Valve Repair
Send us your part numbers and condition. Our engineers respond with repair scope, turnaround, and pricing.