The Offset Strainer cum Air Eliminator is fitted on bulk meter inlet side and is specifically used with preset meters. The wire mesh filter element is positively clamped by a spider, stud and nut arrangement. A drain plug is provided to facilitate servicing. Liquid impurities get filtered on passing through the filter element and the clean liquid flows through the bulk meter. For new installations, it is advisable to first thoroughly flush lines before installing the bulk meter. Periodic filter element inspection and cleaning is necessary to prolong the life of the bulk meter.
The air eliminator is mounted on top of the strainer body. It consists of a stainless steel float connected to a pilot valve via multiple linkages. When the air collects in the air eliminator, the buoyant force acting on the float reduces, the float drops down along with the pilot valve connected to the linkage and the air escapes through the main valve. As liquid rises in the air eliminator, the float rises to lift the pilot valve, thereby closing the air release opening of main valve.