 Step 1 - A Tuf-Lok coupling ring is placed over each square cut, deburred tube end. |
 Step 6 -The Tuf-Lok rubber gasket is positioned on one tube end. |
 Step 2 - The Tuf-Lok coupling rings are held in place using the nylon ring gauges provided, ensuring correct welding position. |
 Step 7 - Both tube ends are butted together and the rubber gasket is centered. |
 Step 3 - The coupling ring is tack welded in place between the ring gauges. |
 Step 8 - The Tuf-Lok cover slips over the rings and against the rubber gasket. |
 Step 4 - The nylon ring gauges are removed and the ring is con- tinuously welded on the tube end side only. The weld does not need to be air tight. |
 Step 9 - Bonded metal tabs on the Tuf-Lok gasket are positioned between cover halves. |
 Step 5 -A simple soap solution is used to lubricate the Tuf-Lok seal for ease of installation. |
 Step 10 - With both metal Tuf-Lok covers positioned over the welded rings, the covers are evenly tightened. |
