Emerson Process Mgmt Regulator Tech, Inc. (Emerson) is recalling certain Fisher Pressure Relief Valves model numbers H732A, H832A, H733, and H833 manufactured from April 9, 2013, through April 24, 2015 and sold as aftermarket or for use as service replacement equipment in cargo tank trailer applications for transporting compressed gases, such as butane or amines. The flow rate of valves with relief setpoints up to 200 psig may be restricted in the event the tank trailer is involved in a crash or other emergency and is exposed to a fire.
Without sufficient flow in these conditions, the tank could explode causing serious injury to bystanders.
Emerson will notify owners and will provide replacement pressure relief valves free of charge. The recall began on August 17, 2015. Owners may contact Emerson customer service at 1-888-237-1751.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.