FISHER FISHER H833 RELIEF VALVE Recall
Hazard assessment based on recall description.
This AI-generated summary is provided for general informational purposes only and is derived from publicly available recall notices. It supplements but does not replace official agency classifications or safety instructions.
Check Your Product
According to the National Highway Traffic Safety Administration (NHTSA)
Product
FISHER H833 RELIEF VALVE
Brand
FISHER
Lot Codes / Batch Numbers
Not specified in NHTSA notice. Check official source for details.
Emerson Process Mgmt Regulator Tech. Inc is recalling certain FISHER H833 RELIEF VALVE equipment due to fuel system, other:storage:tank assembly:pressure relief devices issues. Without sufficient flow in these conditions, the tank could explode causing serious injury to bystanders..
Summary derived from NHTSA notice
Reason for Recall
As stated by NHTSA
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.
Reported concern (NHTSA)
Without sufficient flow in these conditions, the tank could explode causing serious injury to bystanders.
Recommended Action
Per NHTSA guidance
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.
Verify this information on the official source
For complete details and official instructions, check the National Highway Traffic Safety Administration (NHTSA) directly.
View official NHTSA recall noticePage updated: Jan 10, 2026