May 5, 2011 - The purpose of this procedure is to guide the installation of the head seals in a Shafer Hand. This procedure is to be used. Shafer Hand Pump. Lubricate the new Parker PolyPak® Rod Seal (75) [with clean system fluid] and install in the Pump Head (2), with the. 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. The temperature range of Molythane is -65 °F to +200 °F (-54 °C to. More Parker Polypak Seal Handbook images. Parker’s PolyPak seal is a patented precision molded multi-purpose seal. PolyPak combines an O-ring type synthetic rubber o-spring with a conventional lip-type seal.

ESP International is your source for a wide range of Parker symmetrical seals to meet the broad demands of the fluid power industry. Parker symmetrical profiles are designed to fit the center of the gland. They are categorized as symmetrical profiles because the shape of the outside diameter sealing lip matches the shape of the inside diameter sealing lip. This symmetrical design, with its centered fit in the gland, allows the profile to function either as a rod or piston seal. Click a profile for more details. SPP Profile, Standard PolyPak® Square Cross-Section O-ring Energized Lip Seal Parker’s Standard PolyPak is a squeeze seal with a symmetrical profile for use in either rod or piston applications.

The standard Molythane® shell provides high wear resistance and the o-ring energizer functions as a spring to maintain sealing contact under low pressure. The Standard PolyPak utilizes a straight cut scraper lip design formed by a precision trimming process. The scraper edge wipes both fluid film and contamination away from the seal. A wide selection of sizes and alternate compounds allow this profile to match up with many hydraulic applications.

The Standard PolyPak is an economical choice as a stand alone rod or piston seal. With less squeeze force than the Deep or Type B profiles, the Standard PolyPak can be installed back-to-back, in separate glands, for bi-directional sealing. To protect against pressure trapping, it is recommended that the o-ring be removed from the Standard PolyPak facing the lower pressure side of the application. Technical Data Standard Materials* Temperature Range Pressure Range† Surface Speed Shell P4615A90 -65°F to +200°F (-54°C to +93°C) 5000 psi (345 bar).

PolyPak Seals offer these advantages: • High conformability • Excellent sealability • Extrusion resistance • High stability • Long service life • Easy retrofit • Wide choice of profiles • Wide choice of materials PolyPak seals are available in three styles: • Standard PolyPak (SPP Profile) • Deep PolyPak (DPP Profile) • Type B PolyPak (BPP Profile) SPP Profile, Standard PolyPak, Square Cross-Section O-ring Energized Lip Seal Parker’s Standard PolyPak is a squeeze seal with a symmetrical profile for use in either rod or piston applications. 6000 Free Embroidery Downloads Pes. The standard Molythane® shell provides high wear resistance and the O-ring energizer functions as a spring to maintain sealing contact under low pressure. The Standard PolyPak utilizes a scraper lip design formed by a precision trimming process.

The scraper edge wipes both fluid film and contamination away from the seal. A wide selection of sizes and alternate compounds allow this profile to match up with many hydraulic applications. The Standard PolyPak is an economical choice as a stand alone rod or piston seal. With less squeeze force than the Deep or Type B profiles, the Standard PolyPak can be installed back to back, in separate glands, for bi-directional sealing. To protect against pressure trapping, it is recommended that the O-ring be removed from the Standard PolyPak facing the lower pressure side of the application.

DPP Profile, Deep PolyPak®, O-ring Loaded Lip Seal with Scraper Lip Design Parker’s Deep PolyPak is a squeeze seal with a symmetrical profile for use in either rod or piston applications. Its rectangular shape ensures stability in the gland. The standard Molythane® shell provides high wear resistance and the O-ring energizer functions as a spring to maintain sealing contact under low pressure or vacuum applications. The Deep PolyPak scraper lip design cuts fluid film and moves contamination away from the seal.

The sharp edge of the lip is formed by a precision knife trimming process. A wide selection of sizes and alternate compounds allow this profile to match up with many hydraulic applications.