Pass-through dual containment fitting

A pass-through fluoropolymer dual containment fitting for protectively sealing a portion of pass-through perfluoroalkoxy tubing, comprising:

• (a) a fitting body having a longitudinal bore for receiving said pass-through perfluoroalkoxy tubing, a first threaded end, a second threaded end having an extending nose portion, and a collar intermediate said first and second threaded ends, said collar having an annulus for receiving an o-ring, a nut having a longitudinal bore threadably engageable with said second threaded end for maintaining said fitting body in a fixed position;
• (b) a compressive sealing device, said compressive sealing device having a longitudinal bore for receiving said pass-through tubing and comprising a collet with a plurality of gripping teeth, said compressive sealing device threadably engageable with said first threaded end;
• whereby when said compressive sealing device is fully engaged with said first threaded end said compressive sealing device forms a fluid-tight seal with said fitting body and securely grips the perfluoroalkoxy pass through tubing;
• and p1 (c) a dual containment sealing device, said dual containment device comprising a perfluoroalkoxy containment tubing and a flared end fitting, said perfluoroalkoxy containment tubing having a longitudinal bore therethrough for receiving said pass-through tubing and having a flared end, said nose portion insertable into said flared end, said flared end fitting threadably engagable with the second threaded end;
• whereby when said flared end fitting fully engages with said second threaded end, said flared end fitting compresses said flared end to said nose portion forming a fluid-tight seal between said dual containment device and said fitting body.

A pass-through dual containment fitting for protectively sealing a portion of pass-through tubing, comprising:

• (a) a fluoropolymer fitting body having a longitudinal bore for receiving said pass-through tubing, a first threaded end, a second threaded end, and a collar intermediate said first and second threaded ends, said collar having an annulus for receiving an o-ring, said collar of a larger diameter than said second threaded end such that said second threaded end of said fitting body may be inserted through a cut-out in a surface, said surface having first and second sides, a nut threadably engageable with said second threaded end such that said nut contacts said second side of said surface for holding said fitting body in position within said cut-out;
• (b) a compressive sealing device having a longitudinal bore for receiving said pass-through perfluoroalkoxy tubing and comprising a plurality of gripping teeth for gripping said tubing, said compressive sealing device threadably engagable with said first threaded end;
• whereby when said compressive sealing device is fully engaged with said first threaded end said compressive sealing device forms a fluid-tight seal with said fitting body and the collet gripping teeth grip the perfluoroalkoxy tubing axially fixing said tubing therein;
• and
• (c) a fluoropolymer dual containment device comprising a containment tubing and a fitting, said containment tubing having a longitudinal bore therethrough for receiving said pass-through tubing, said fitting engageable with said second threaded end forming a fluid-tight seal between said dual containment device and said fitting body.

A dual containment system for connecting between a first connection point and a second connection point and for providing passage through a panel aperture, the system comprising:

• (a) a central perfluoroalkoxy pass-through tubing extending between the two connection points, the tubing integral and uninterrupted as it passes through the panel aperture, the pass-through tubing having an exterior surface;
• (b) a plastic dual containment fluoropolymer fitting secured to the panel at said panel aperture, the fitting having a first end and a second end and comprising a collet with a plurality of gripping teeth at said first end for gripping the perfluoroalkoxy tubing and holding said tubing securely in place, the first end sealingly engaged to the exterior surface of the pass-through tubing;
• and
• (c) an outer containment tubing extending between the first connection point and the plastic fitting and containing the pass-through tubing, the outer containment tubing having an end portion sealingly engaged at the fitting.

A fluoropolymer dual containment fitting for engaging a portion of a perfluoroalkoxy pass-through tubing having an exterior surface and for engaging an end portion of a outer perfluoroalkoxy containment tubing surrounding said pass-through tubing, the end portion of the outer perfluoroalkoxy containment tubing having an exterior surface and an interior surface, the dual containment fitting comprising:

• (a) a fluoropolymer fitting body having a first end with a threaded exterior surface, a second end with a threaded exterior surface, and an intermediate portion between the first and second ends, the fitting having a bore extending therethrough for receiving the pass-through tubing;
• (b) a collet with a plurality of gripping teeth for gripping and securing the perfluoroalkoxy pass through tubing, the collet positioned at the first end;
• (c) a nut threadably engageable on the exterior threaded surface of the first end for sealingly engaging the exterior surface of the portion of perfluoroalkoxy pass-through tubing and for driving the gripping teeth into the perfluoroalkoxy pass through tubing;
• and
• (c) a nut threadably engagable on the exterior surface of the second end for sealingly engaging the end portion of the plastic outer containment tubing on at least one of the interior or exterior surfaces of the containment tubing.