Reheater isolation device and chemical connector

Claim 1

A combination pipe coupling, clean out and isolation device comprising in combination: a. a "T" fitting having opposite arms adapted to couple two pipes together in end-to-end relationship, b. a side arm extending at right angles to said arms, said side arm having a terminal end, c. valve seats in each of said opposite arms, said seats being set at an angling relationship to each other, forming a "V" shaped opening therebetween with the open side of the "V" facing said side arm, d. an annular, internal recess in said side arm, e. a sealing plate forming part of said combination, said sealing plate being adapted to be placed in said side arm and held in place by ring segments fitting into said recess and said plate, f. a flange at the terminal end of said side arm, said flange being adapted to fasten to a clean out connector, g. internal, inwardly extending projections within said side arm, h. complementary split disc halves fitting into said "V" shaped opening between the valve seats, i. a spider engaging the underside of said projections, and j. screw means carried on said spider, said screw means engaging said split disc halves and forcing them into sealing relationship with said valve seats.