3202130-3 — 6" Check Valve Repair & Overhaul

Component Overview

A six-inch check valve is a large-diameter one-way flow device installed in a pneumatic duct to permit airflow in a single direction while preventing reverse flow, protecting upstream sources and maintaining duct pressure integrity within the air-management system. Sized for high-volume bleed or distribution ducting, it typically uses a spring-loaded flapper or poppet that opens under forward pressure and seats against backflow. Its check-valve capability isolates branches and prevents cross-feed between pressure sources. Common degradation includes seat and seal erosion causing reverse leakage, flapper hinge wear, spring fatigue or relaxation altering cracking pressure, and corrosion of the body and internal surfaces. Foreign-object damage, sticking due to contamination, and disc fracture from flutter commonly drive inspection, reseating, spring replacement, and flow and leakage testing.

Aircraft Application

Part number 3202130-3 (6" Check Valve) is installed on the Boeing 757. QTC supports operators and MROs servicing this platform with certified repair and overhaul.

Our Repair Capability

QTC repairs and overhauls 3202130-3 to the original manufacturer's specifications under our FAA and EASA Part 145 approvals. Our team — including former OEM pneumatic & air management engineers — performs teardown, inspection, cleaning, component replacement, functional testing, and certification, returning a serviceable unit with the appropriate airworthiness release. We also develop repairs for rejected and beyond-economic-repair (BER) hardware.

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Related Parts

Other 6" check valve part numbers we repair — view all 6" Check Valve parts →

Frequently Asked Questions