Kemper Dart Style Check Valves provide flow back protection in well service applications such as Acidizing, Cementing, Fracturing, Sand Control, and Well Kill. Available in 2" and 3" models with pressure ratings from 6,000 psi to 15,000 psi CWP. These spring-loaded dart checks assure flow back protection from 0 psi thru 15,000 psi. Kemper's unique, modular design allows the valve to be factory assembled for standard or reverse flow. Easy replacement of worn component parts increase the service life of the valve.