Lincoln Service Parts 1 › Lincoln Electric 9SM17321-4 MANUAL VALVE M17321-4 Lincoln Electric 9SM17321-4 MANUAL VALVE M17321-4 Sale Price: $635.63 Original Price: $730.98 MANUAL VALVE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! MANUAL VALVE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1