You are correct! The Bell and Gossett SA-1 is now obsolete. The 107018 is the same valve and is now the direct replacement for the SA-1. The 107018 is a 1" NPT Cast Iron Straight Angle Pattern Flo-Control Valve. We do not suggest trying to repair the older valve. As it is corroded and does not function any longer as designed (sticks and is not moveable), we suggest replacing the SA-1 with the Bell and Gossett 107018.
For more information please see the product 107018 tech data sheet.
Replied on Jul 30, 2017 by Ori from Industrial Stores