Vacuum Relief Valve
The development of Kelso's vacuum relief valve was driven by customers’ demand for a better performing VRV due to high failure rates of current products in the market. Kelso is dedicated to the development of best available safety technologies that deliver long term reliable high performance. Our new innovative VRV features our patented constant force pressure springs and meets the new DOT-117 tank car specifications. Kelso's VRV is available as 1.5, 3 or 4.5 psi with a 2.5 inch threaded connection or flange.