Burkert 3233 Process Shut-Off Valve | Hand Operated Diaphragm Control Valve for Industrial Systems Product Overview The Burkert Type 3233 Process Shut-Off Valve is professionally engineered for secure, positive fluid isolation in comprehensive industrial process systems. Specially optimized for core shut-off functionality rather than mere flow regulation, this hand-operated diaphragm valve delivers robust, fail-safe fluid cut-off performance for industrial pipeline systems.