Poly-Flo

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A Universal Fitting

Poly-Flo fittings are used with plastic or soft metal tubing for pneumatic instrumentation circuits and many other applications involving gases and liquids.

Acetyl copolymer sleeves, for use with Poly-Flo, PVC or EVA tubing, are furnished with Poly-Flo fitting sizes of ¼” to ½” O.D. Universal brass sleeve and nut assemblies, for use with impolene and Nylo-Seal tubing and soft metal tubing, are also available for these sizes, and are furnished as standard with 1/16”, 1/8” and 3/16” sizes.

The versatile brass nut (half-knurl, half hex) with plastic sleeve is easily and quickly finger tightened on Poly-Flo, PVC and EVA tubing.  The hex portion permits wrench tightening (1 turn after fingertight).  Wrench tightening is recommended for all applications where brass sleeves are used, and is desirable whenever service conditions require the full pressure capability of the tubing.

Reduce Installation Time And Labour Cost

Tests show that that Poly-Flo fittings can be assembled in an average time of 11.7 seconds, compared to 18.5 seconds for regular compression fittings, and 48.2 seconds for flare type fittings.  This offers a minimum of 36% saving in installation time, compared to the regular compression type fittings, or ordinary fittings for plastic tubing, and a minimum of 77% saving compared to the flare type fittings.

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Assembly

To assemble the Poly-Flo fitting, just push the tubing into the fitting and tighten the nut.  There is no need to disassemble the fitting, and no fumbling for a loose sleeve, as the sleeve snaps into the nut.  The nut revolves around the sleeve as it is tightened, preventing twisting and weakening of the plastic tubing.  When used with Poly-Flo, PVC and EVA tubing, the Poly-Flo fitting will hold the burst pressure of the tubing when assembled finger tight.

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Technical Information

Construction

• Three piece: body, nut and sleeve

• Shapes: brass, forged SAE CA377 or equal

• Connectors, Unions, Nuts: brass SAE CA360 or equivalent

• Sleeves: Acetyl Copolymer (Celcon ®) or brass

Tube Sizes

• 1/16” to 1/2” O.D

Pipe Threads

• Long Length Dryseal American (National) Standard Taper pipe threads (NPTF).

Working Pressure

• Nominal: 125 psi

• Maximum: 500 psi

Compatible Tubing

• Poly-Flo ®        Polyethylene   Nylon      

• Polyallomer       Impolene        Polyvinyl Chloride

• Polypropylene    Soft Metal      Nylo-Seal ® (SN, NF)

 

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