Parts molded of PTFE are utilized in hydraulic and pneumatic cylinders, motors, pumps, and valves. They reduce equipment wear, fluid loss, and frequency of packing changes. Suitable for static or dynamic (linear or rotary) applications. A complete V-ring seal requires at least one V-ring, one male adapter, and one female adapter. The female adapter provides an extra sealing edge.
Originally used as replacements for AN-6225 packings in rubber or leather, this low-profile design has become the industry standard for PTFE packing sets. The included angle on the convex side of each "V"-ring (and the male adapter) is larger than the included angle on the concave side (and the female adapter). Compression of the set causes the lips of the rings to flare in the radial directions, thus creating the desired seal.
This higher-profile design minimizes the number of rings needed to fill a stuffing box. The rounded top of each ring forces the lips of the adjacent ring to flare in the radial directions, creating the desired seal. The large void areas permit thermal expansion where binding may be an issue.
This design incorporates an internal rubber "O"-ring as an energizer, which helps compensate for the cold-flow inherent in PTFE under pressure. When properly compressed the rubber component is completely encapsulated and thereby insulated by the PTFE from exposure to undesired substances.
1860 Series - Control Valve - Stem Packing Sets
Configured for commonly used control valves, these molded PTFE sets consist of (3) “V”-rings, (1) “M” -ring, (1) “F”-ring and a wiper ring. For lower operating pressure the thinner “legs” of this higher profile design allows for sealing with less compression of the packing set. Our V-Ring packings are suitable for most applications. Component parts are available separately for custom configurations.
PTFE resins have excellent physical properties for a wide range of sealing applications. They are essentially chemically inert and have a wide operating temperature. They are pliable, yet resilient. They have a very low coefficient of friction. Unfilled, virgin resins are considered FDA compliant, for use in food-processing equipment such as sanitary or flange gaskets.