Kelso Technologies Inc. has been granted a United States Patent for its new proprietary vacuum relief valve (VRV) effective from 13 September. The VRV is a low pressure device specifically designed to protect rail tank cars from the effect of an excessive vacuum and prevents the implosion of the tank car.
The patent took approximately two years to process and will remain in effect for the next seventeen years. The development of the new VRV design has been driven by customers’ concerns and demands for a better performing VRV due to high failure rates of current products in the market today.
The new VRV design features Kelso’s patented constant force springs and meets the new DOT-117 tank car specifications implemented on 1 October 2015. The VRV has been in commercial service trials as approved by the Association of American Railroads (AAR) with the goal of full commercial distribution of the VRV to customers in the near future.
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