THREAD-O-RING™ (TOR) fittings are used as purge and equalization fittings with TDW STOPPLE® plugging machines and other TDW equipment. Taps can be made without shutdown using the TDW T-101 drilling machine or the 360 tapping machine.
TOR fittings can also be installed during new construction and used for blowdown connections on either side of a block valve.