The Roof Cleaning Institute Of America Training & Certification Forum
"Find A Certified Roof Cleaner Directory"

Important Properties of KYNAR Products:

• High mechanical strength and toughness
• High thermal stability
• High abrasion resistance
• High dielectric strength
• Chemical and solvent resistance
• UV light and radiation resistance
• Weathering resistance n Fungi resistance

Outstanding Characteristics of KYNAR Products:

• KYNAR has been used as a pipe liner in chemical processing plants since its introduction nearly 30 years ago. It has been used extensively in the paper and paper pulp industries, where equipment is constantly exposed to high concentrations of Chlorine and Chroline Dioxide. In these applications the permeation resistance of KYNAR components far surpassed that of PTFE.

• KYNAR products are used extensively in silicon microcircuit fabrication. Processes in this industry commonly use deionized water, a fluid that is highly corrosive to steel. The deionized water is often sanitized through the injection of ozone and exposure to UV light, both of which can seriously degrade the integrity of materials less durable than KYNAR.

Clamps Must be used with all fittings which have Anti-Rotation Devices.

Never place a clamp over the large diameter of the barb. Clamps work best when tightened around the recess behind the barb. For best results place the clamp behind the barb and over the anti-rotation devices. The anti-rotation devices are small oval shaped raised areas which inhibit hose rotation on the barb. Rotation of the hose on the barb causes many of the leaks that occur with other fittings.

• Quick couplings and connectors add versatility and convenience to any fluid handling system. OMEGAÆ couplings are economical and easy to install. They quickly pay for themselves with labor and maintenance cost savings. OMEGA's leak free couplings include a variety of built-in end fitting and mounting options.
• OMEGAís threads are molded in precision-ground cavities resulting in perfectly matched threads at the parting line. While this method is the most costly, it produces the cleanest, most accurate molded thread possible.
• OMEGAís single-barbed fittings are made so that the molded-in parting line stops at the base of the barb. The ridge and the conical surface are free of the molded-in leak path. The conical surface on the fitting is smooth and glass-like, for excellent sealing.
• Clamping the relaxed hose behind the barb causes the clamp to work like a drawstring, forcing the diameter of the hose to become smaller than the flare of the fitting barb. If the tubing swells from internal pressure (near burst), the clamp will be pulled up tight to the back of the barb and the seal will be maintained.
• Relaxed tubing behind the barb is essential to the barbís ability to bite into the hose.
• When the clamps are placed over the OMEGA exclusive anti-rotation device the tubing cannot be freed by a twisting motion.

• Tooling mismatches often occur in poor-quality fittings causing mismatched threads and barbs and resulting in leakage.
• Tooling cannot be designed to avoid a parting line on multiple barb fittings. This parting line creates a leak path which becomes more pronounced as the tool wears.

Typical Clamping Position:

1. Clamping on top of barbs in attempt to force the tube down behind the barbs can cause damage. It will round off the sharp edges of the barb and cause it to bite less into the tube.
2. The clamping pressure causes the tube to flare out behind the clamp. Barbs located behind the clamp will have little or no effect.

Multiple barbs are typically in close succession. This prevents the tubing from relaxing to its original size, which is essential to the barbís performance. If the tubing does not relax behind the barb, the barb is rendered useless, as shown above. (Note the bridging effect.)

Additional Note:

Brass fittings are machined and do not have the problem of molded-in parting lines. However, brass fittings are usually designed with multiple barbs and have the other problem characteristics shown above. In addition, machinable brass contains free lead. Brass parts cannot be used on any system if internal heavy metals are undesirable or dangerous.