1ST CK POP, RP 2-4

This 2 to 4 inch first check poppet assembly can be used on the Deringer 40 (RP) and 50 (RPDA-II) models. They are designed for sizes 2, 2 ½, 3 and 4 inch and comes pre-assembled from the factory ready for installation. The True Seal(TM) check valve was designed to incorporate a poppet only motion during the check stroke and is used exclusively on the first check assembly on the Deringer RP and RPDA models. This design allows a more consistent pressure loss across the check valve which helps maintain a steady and continual closure of the relief valve.