Diaphragm Double-Seated (Balanced) Back Pressure Valve

The Wellmark Series 5555 Cemco-Style is a unique valve, with its simple and near-balanced double-seated design and a history of trouble-free operation - which has contributed materially to its acceptance in the oil industry.

Primary application is to hold back pressure on separators, treaters, Lact units, and other accumulators where upstream pressure is required to be kept within a certain preset range. This valve may also be used as a differential valve by utilizing secondary signal pressure, along with spring force on top of the diaphragm, to oppose flow pressure applied to the bottom of the diaphragm.