Vacuum Relief Valve
The development of Kelso's vacuum relief valve was driven by customer demand for better performance due to high failure rates of older models of VRVs. The Kelso VRV features constant force pressure springs and meets 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.