Dual pilot manifold assembly for a safety relief valve

摘要

1. A cartridge valve 80 assembly for mounting within a block cavity 116 extending through a face 62 in a block 60, the block cavity 116 having a central valve axis, the block 60 having a first passageway 254 therein communicating with a first portion 114 of the block cavity 116, and a second passageway 268 therein communicating with a second portion 120 of the block cavity 116 axially spaced from the first portion 114 of the block cavity, comprising a valve body 110 positioned within the cavity 116 and having a valve seat therein; a valve element 159 carried by t he valve body 110 and movable with respect thereto for sealing engagement with the valve seat 154 to fluidly isolate the first passageway 254 and the second passageway 260, and for unsealing with the seat 154 to establish fluid communication between the first passageway 254 and the second passageway 268; a seal carried by the valve body 110 for sealing engagement between the valve body 110 and the block 60 at a location axially between the first portion 114 of the block cavity 116 and the second portion 120 of the block cavity 116; and a bushing 126 having a stop for engagement with the valve body 110 and external threads 132 for threaded engagement with the block.