Kelso Technologies Inc. (Kelso), headquartered in British Columbia, Canada, recently announced that it has been granted a United States Patent (#9,234,601 B1) for its Second Dual Preset Pressure Relief Valve (DPRV). Kelso designs, produces and sells proprietary tank car service equipment used in the safe handling and containment of hazardous materials during transport.
The DPRV design is based on specialized mechanical engineering innovations that provide safety benefits in both accident and non-accident environments. In an accident involving fire for instance, the DPRV will significantly lower its operating pressure rating to a level that will keep the valve open in order to evacuate the tank car in less than 100 minutes as required by AAR recommendations.