Parflex flexible polyethylene thermoplastic tubing is extruded from high molecular weight resin for increased dimensional stability, uniformity and long-term strength. Its resistance to environmental stress cracking greatly exceeds that of ordinary polyethylene tubing. Parflex polyethylene tubing is available in black as well as seven coding colors as recommended by the Instrument Society of America. Black (EB) tubing contains an ultraviolet inhibitor which is recommended for use in sunlit areas.
Parker Parflex flexible polypropylene tubing may be used at higher temperatures and working pressures than polyethylene tubing. Resistance to hot water and hot corrosive acids is excellent. Polypropylene tubing will last many times longer than nylon tubing in hot water service. Parker polypropylene tubing is available in pure white or ultraviolet resistance black formulations. White polypropylene meets all specifications of the U.S.F.D.A. for materials in contact with foods or drugs used for human consumption. Good resistance to mineral and vegetable oils.