SERVICE T-FITTING AND BY-PASS SADDLE FITTING

摘要

PROBLEM TO BE SOLVED: To prevent gas leakage from the surrounding of a hole saw when the hole saw bores a tube after the saddle part of a service T-fitting is connected to a gas pipe. SOLUTION: The surrounding of the hole saw is sealed when a o-ring 12 is installed in the appropriate place of a below screw 11a of a hole saw 11 and the hole saw 11 bores the tube 16.