Welding purge control using electronic flow control

摘要: A purging system for an arc welder is disclosed wherein the comprises a control (20), at least one automatic flow arrangement (MFC) purge gas (28, 30), said (WlFC) being operably associated with (20) controlling operation of to rate 30) weld site (W) during welding operation. An apparatus and mass controller (MFC), comprising input that receives output provides operation, adjusting (10) power supply (16), coupled from housing encloses (20). method performing applying profile purge. higher before begins, lower after ends. on end abutting cylindrical workpieces (WP)1 ID as pressure changes