Parker Wiper Seals

Hydraulic Wipers

One of the primary causes of premature component failure in a fluid power system is contamination. Contaminants such as moisture, dirt, and dust can cause extensive damage to cylinder walls, rods, seals and other components. It has always been Parker’s design philosophy to use aggressive wiping geometries to prevent the damage that is caused when trace amounts of dirt or water are allowed to enter a fluid power systems.

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YD Profile, Premium Snap-in Wiper with O.D. Exclusion Technology

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The YD profile wiper is the premier design among high performance, snap-in excluders. Featuring a secondary O.D. lip which seals against the shoulder region of the gland, the YD profile wiper prevents water and other contaminants from entering around the static side of the wiper. For ultimate performance, the YD profile also incorporates an aggressive, knife-trimmed wiping lip to ensure maximum exclusion along the rod. A true zero-radius lip provides the most effective wiping action available.

Technical Data

Alternate Materials: For applications that may require an alternate material, please consult ESP.

SHD Profile, Industrial Snap-In Wiper

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Parker SHD profile wipers are an outstanding choice for light and medium duty hydraulic and pneumatic applications. The slotted heel design prevents pressure traps from forming between the rod seal and wiper. Broad tooling availability, up to 30″, makes the SHD a good choice for large rod diameters. The snap-in design is oversized for a snug fit and excellent stability. This makes the SHD a great all-round wiper in an economical package.

Technical Data

Alternate Materials: For applications that may require an alternate material, please consult ESP.

SH959 Profile, AN-Style Snap-In Wiper

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Parker SH959 profile wipers are AN style excluders designed to ensure proper fit with all MS-28776 (MS-33675) dash size grooves. The slotted heel design prevents pressure traps from forming between the rod seal and wiper. This profile of wiper requires very little radial or axial space. This is why they are ideal in light to medium duty hydraulic and pneumatic applications where such space constraints are present.

Technical Data

Alternate Materials: For applications that may require an alternate material, please consult ESP.

AH Profile, Premium Double-Lip Canned Wiper

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Parker’s AH profile wiper is the ultimate metal-clad excluder for heavy-duty hydraulic applications. Press-fit installation prevents O.D. contamination while the additional sealing lip works in conjunction with Parker rod seals to provide redundant sealing for leakage reduction. An aggressive wiping lip, facing the environment, ensures the utmost performance in contaminant exclusion along the rod.

Technical Data

Alternate Materials: For applications that may require an alternate material, please consult ESP.

J Profile, Performance Canned Wiper

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The press-fit installation of Parker’s J profile wiper guards against O.D. contamination and results in simple counter-bore groove machining. The wiping lip on the J profile wiper is very aggressive, eliminating the ingression of dust, mud and moisture from harsh work areas. J profile wipers are ideal for medium and heavy duty hydraulic cylinders in the most demanding applications.

Technical Data

Alternate Materials: For applications that may require an alternate material, please consult ESP.

AY Profile, Premium Double-Lip Wiper

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The AY profile can be used as a heavy to light duty wiper. When used in high-pressure applications with the proper Parker rod seals, the AY profile complements the sealing system by providing an additional beveled sealing lip, yielding excellent film-breaking and the driest rod sealing available. These dual acting features also enable it to be used by itself in low-pressure applications as both the rod seal and the wiper. Knife-trimmed sealing lips ensure the best possible film breaking. IMPORTANT: When using the AY wiper in conjunction with other rod seals, it is important to select a rod seal profile that enables pressure relief of fluid into the system, otherwise a pressure trap may form between the wiper and rod seal. Suggested rod profiles are BT, BS, and B3 u-cups.

IMPORTANT: When using the AY wiper in conjunction with other rod seals, it is important to select a rod seal profile that enables pressure relief of fluid into the system, otherwise a pressure trap may form between the wiper and rod seal.

Technical Data

Alternate Materials: For applications that may require an alternate material, please consult ESP.

H and 8600 Profiles, Performance Double-Lip Wiper

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Parker’s H and 8600 profile wipers are double-lip excluders sharing identical geometries for combining the actions of rod sealing and wiping. H wipers, available in plastic compounds, are intended for medium pressure hydraulic applications as a redundant rod seal or for low-pressure systems as the sole rod seal and wiper. The 8600 profile wiper, available in rubber compounds, is typically used for pneumatic cylinders where lower friction is required. As with the H profile, the 8600 profile can be used with another rod seal or by itself as a dual acting sealing/wiping unit.

Technical Data

Alternate Materials: For applications that may require an alternate material, please consult ESP.

AD Profile, PTFE Wiper Seal

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The Parker AD profile is a double acting wiper for use in low to medium duty hydraulic cylinders. It is a two-piece design comprised of a filled PTFE cap that is energized by a standard size o-ring. The wiping and sealing design of the AD profile assists the primary rod seal in preventing leakage by helping seal fluid in the cylinder when the rod extends. When the cylinder rod retracts, the outside sealing edge prevents contamination from entering the system. Parker’s AD profile will retrofit non-Parker wipers of similar design.

The AD profile may be ordered without the energizer.

Technical Data

Alternate Materials: For applications that may require an alternate material, please consult ESP.

ESP International is proud to be one of the few premier distributors to qualify as a “Parker Seal Technology Center (STC)”.

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