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Railworthiness Directive, Notice No. 1 - McKenzie Valves

UPDATED May 14, 2015 - Letter from FRA to RSI authorizing modified RWD compliance schedule

On March 18, 2015 FRA published a Railworthiness Directive applicable to railroad tank cars equipped with certain valves marketed and sold by McKenzie Valve & Machining LLC (formerly McKenzie Valve & Machining Company), an affiliate company of Union Tank Car Company (UTLX). 

A McKenzie valve.

A gloved hand touching a McKenzie valve.

An aerial view of a McKenzie valve.

Recent FRA investigations identified several railroad tank cars transporting hazardous materials and leaking small quantities of product from the cars' liquid lines. FRA's investigation revealed that the liquid lines of the leaking tank cars were equipped with a certain type of 3″ ball valve marketed and sold by McKenzie Valve & Machining LLC. FRA further found certain closure plugs installed on the 3″ valves cause mechanical damage to the valves, which leads to the destruction of the valves' seal integrity and that the 3″ valves, as well as similarly-designed 1″ and 2″ valves provided by this manufacturer are not approved for use on tank cars.

FRA issued this Railworthiness Directive to all owners of tank cars used to transport hazardous materials within the United States to ensure they identify and appropriately remove and replace these valves with approved valves consistent with Federal regulations.

Last updated: Sunday, November 17, 2019