To provide a pipe fitting for a refrigerating cycle capable of reducing a time required for assembling and preventing the erroneous assembling of a back-up ring.
A sealing device 7w provided with a first member 8 and a second member 9 which are connected to each other to prevent the leakage of fluid from a connection part of the first and second members has a sealing member 50b mounted in a mounting part 81 of the first member to seal faces to be sealed of the first and second members and made of a rubber material and the back-up ring 50a mounted in the mounting part of the first member, formed of a material for making the permeation of fluid more difficult than that of the sealing member, being continuous in the direction of the whole periphery, and supporting the sealing member. The sealing member 50b and the back-up ring 50a are integrated to each other.
KAKEHASHI SHINJI
Jun Tsuruta
Tetsuro Shimada
Tanimitsu Masaharu
Masaya Nishiyama