Removable valve seat inserts for pressure and vacuum relief valves

Abstract

Removeable valve seat inserts for pressure and vacuum relief valves are disclosed. An example relief valve includes a valve body defining a fluid passageway between a first opening and a second opening, a valve seat coupled to the valve body at the first opening of the valve body, the valve seat having a cylindrical body, a seat insert disposed on an end of the valve seat, and a pallet moveable, based on a pressure differential across the pallet, between a closed position in which the pallet is engaged with the seat insert to block fluid flow through the valve seat and an open position in which the pallet is spaced from the seat insert to enable fluid flow through the valve seat.

Dependencies are inferred from the claim text.