MEC Low Emission Self-Cleaning Adjusting Screw with Seal

MEC Self-Cleaning replacement screw for Low Emission vent valves. Designed to minimize loss of product while allowing the operator to effectively bleed down connections and detect liquid levels while filling containers. Vent valves provide an effective means to verify valves have closed in the transfer system when installed into the downstream auxiliary port on the Marshall Excelsior globe and angle valves. Opening the vent valve until liquid or vapor stops venting indicates it is safe to disconnect.|Reduce emissions by 70% during normal container filling operations|Self-cleaning|#54 orifice|1/4 in. MNPT connection|Replacement stem only|With seal