What is a PolyPak seal?
Description. Parker’s PolyPak seal is a patented precision molded multi-purpose seal. The Parker PolyPak combines an O-ring type synthetic rubber o-spring with a conventional lip-type seal to produce a unique sealing device capable of sealing both vacuum, high and low pressure.
What is Molythane material?
Engineered Polymer Systems Division Parker Molythane is the oldest and most generally specified seal material for hydraulic service. This unique material is a superior blend of Polyurethane and internal additives (to provide lubrica- tion) developed for long service in all petroleum based fluids.
What is Polymyte?
Polymyte is a Parker proprietary polyester elastomer. It has exceptionally high tear strength, abrasion resistance, modulus, and a wide temperature range of -65°F to +275°F (-54°C to +135°C). Polymyte is resistant to petroleum fluids, some phosphate ester and chlorinated fluids, common solvents and water below +180°F.
What is a polypak sealer?
The standard Molythane shell (seal body) provides high wear resistance and the O-ring energizer element functions as a spring to maintain sealing contact under low pressure or vacuum applications. The beveled lip design of the Type B PolyPak is excellent for cutting fluid film.
What makes the Parker polypak different?
The Parker PolyPak combines an o-ring type synthetic rubber o-spring with a conventional lip-type seal to produce a unique sealing device capable of sealing both vacuum, high and low pressure. Conventional lip seals, such as the standard u-cups are prone to leakage under low pressure because little or no lip loading is inherent in
What type of seal is used on a Parker hydraulic rod?
Parker’s hydraulic SPP Profile standard PolyPak® seal is a square shaped, symmetrical squeeze seal with a knife trimmed scraper lip for hydraulic rod and piston sealing. Parker’s hydraulic SPP Profile standard PolyPak® seal is a square shaped, symmetrical squeeze seal with a knife trimmed scraper lip for hydraulic rod and piston sealing.
What is a type B polypak seal?
The Type B PolyPak is an economical choice as a stand-alone seal or can be used in tandem with a buffer seal. In piston applications, this seal will function as a unidirectional seal. Dual Type B PolyPak seals should not be installed back-to-back in bi-directional pressure applications, as a pressure trap between the seals may occur.