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Meritor · Brakes & Wheel End
31313-26
In stock · ships from Knoxville
This is the flapper seal used inside the relief valve of a Meritor PSI (Pressure Systems International) automatic tire inflation system.
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Other applications
Other applications
This seal fits the internal flapper assembly of PSI relief valves commonly found on Meritor‑equipped trailers. Always confirm your valve body part number before ordering; related assemblies include MER‑31313‑16.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 1 of 1.
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It acts as a one‑way check valve, allowing pressurized air into the hub while preventing backflow and contamination. Over time the flapper can wear, harden, or tear, causing constant air leaks from the valve or uneven tire pressures. Replacing this seal restores proper inflation and stops the leak.
Part Number: 31313-26
PSI FLAPPER SEAL
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end
