Ameri-lon Pump Packing

Construction: Cross-lock Braid Features: Manufactured from a skived PTFE and Graphite blend. No surface lubricant is required for this naturally lubricious packing, so it never washes out. Unlike filament yarn packings wicking is not an issue. This packing performs exceptionally in abrasive applications.
It last long and stands up to tough applications. It is the most versatile valve or pump packing we sell which is why we gave it has Ameri- in it's name.
Usage:
As both PTFE and graphite are excellent sealing materials, they give Ameri-lon packing exceptional sealing properties that other products cannot offer. Ameri-lon packing is tough and durable, self-lubricant, heat and chemical resistant. It also has good thermal conductivity and very low friction factor.
Application:
Excellent versatile packing for pumps, valves, mixer, agitators or other equipments. Great on abrasive applications. Suitable for use in any rotary, reciprocating or static gland,against all chemicals except very strong oxidizers such as Oleum, Aqua Regia,fuming Nitric Acid and Fluorine.
Limitations: pH: 0-14
Pressure: Up to 300 psi Pumps / 4000 psi -Valves
Shaft Speed: Up to 4500 feet per minute
Temp Rating: -328 to 536 F
Mechanical Seals : http://www.mechanicalseals.net

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What are the different styles of PTFE

Molded and Sintered PTFE:

This type of PTFE was the first to be introduced to the market. This style is made from virgin or reprocessed PTFE resin, without fillers, which is then molded, compressed and sintered. As with any other type of plastic, PTFE has a high creep factor when compressed. The creep factor is detrimental and can lead to having to re-tighten the bolts to maintain seating pressure and prevent leakage. The higher the temperature in the application it is used for, the more the creep factor will increase. Even with these drawbacks, PTFE is affordable, easily available and highly chemical resistant.

Skived PTFE:

This style is similar to molded and sintered PTFE as it is also make of virgin or reprocessed PTFE without fillers. Instead of molding an individual sheet, the sheets are taken from a billet of PTFE with a process called skiving. The skiving process was developed to overcome manufacturing deficiencies of the molding process. Skived PTFE shares the same creep characteristics as molded and sintered PTFE.

Molded or Skived Filled PTFE:

In order to correct the creep characteristics of molded and skived PTFE, manufacturers started adding mineral fillers or fibers in order to reduce creep factor. This indeed reduced the creep characteristics but not by a significant amount.

Restructured Filled PTFE:

Besause the addition of fillers in the molding process was not enough to significantly reduce creep, a new manufacturing process was developed to produce filled PTFE sheets. In this new process the material is laminated before being sintered, which yeilds a highly fibrillated structure with significantly less creep. The different fillers used in this process are as follow:

• Barite: Added for use in strong caustic service. Also FDA compliant.

• Mineral Silica: Used for strong acidic service.

• Hollow Glass Microshperes: Used to increase compressibility.

• Synthetic Silica: Used as subsitute for glass microspheres.

Expanded PTFE:

This style of PTFE is made by heating and stretching PTFE before sintering it. Lke all PTFE it has strong chemical resistance, but unlike molded or skived PTFE, this material has a high compressibility and is good for use in flanges made from fragile materials. The only drawback to this material is that its floppy and difficult to install, especially if the flanges cannot be separated.

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PTFE Gaskets

Polytetrafluorethylene or PTFE is a polymer with an exceptional chemical resistance and is the most widely used plastic for industrial sealing. The only substances that attack PTFE are liquid alkaline metals and free fluorine.

PTFE Gasket products are manufactured by taking either pure PTFE or PTFE with other materials mixed in and sintering or extruding it. Sintering is a process where powdered material is held in a mold and then heated to a temperature below the melting point.

There are different styles of PTFE for different application needs and several different styles can be used in the same application. Additionally, PTFE has good electrical insulation, anti-stick, impact resistance and low friction properties. PTFE was first developed by Dupont who still holds the most recognized brand name "Teflon" by DuPont Co. TEFLON® is a registered trademark of E.I. du Pont de Nemours & Co. Your Order Free Quote for PTFE Gaskets : http://gasketsales.com/PTFE-gaskets.php

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