Lincoln Service Parts 1 › Lincoln Electric 9SG9818-4F VALVE G9818-4F Lincoln Electric 9SG9818-4F VALVE G9818-4F Sale Price: $691.83 Original Price: $795.61 VALVE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1 Add To Cart Added! VALVE PURCHASE PRICE SHOWN IS FOR A QUANTITY OF 1