Parker Poly Pak Seal Handbook

Sealing Products – Fluid Power & Pneumatic Seals

POLYPAK U-Cup. Polypak SPP (Rod Seals) 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. 465 POLYPAK SEAL. 5/8' x 7/8' x 1/8' Add to Cart. Click on MM/Inches to view the sizes. ID (Inner) OD (Outer) Thickness Seal Height Groove Height Material Shore Min Temp (°C) Max Temp (°C) Pressure (PSI) 12500625: 0 0.625: 0 0.875: 0 0: 0 0: 0 0.125: Molythane (PARKER P4615A90) 90-54: 93: 5000: Head Office 87 Kaki Bukit.

PolyPaks are multi-purpose seals that are precision molded, multi-purpose sealing devices combining an O-Ring type O-Spring with a conventional lip Seal. PolyPaks provide excellent seal from hard vacuum to more than 60,000 Psi. The PolyPaks won’t leak under low pressure like many conventional U-packing seals and maintain lip loading on the ID and OD interface during temperature extremes.
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:

1. Standard PolyPak (SPP Profile)
2. Deep PolyPak (DPP Profile)
3. Type B PolyPak (BPP Profile)

Rod Sealing with PolyPak Seals
As a general rule, rod seals are more critical in nature than their companion piston seals. With increasing OEM requirements for “dry rod” capability, both to conserve system fluid and avoid leakage, the design and selection of the rod seal can be more challenging than its piston counterpart. Parker recommends the use of the Type B PolyPak (BPP Profile) for rod seal applications due to its design features, including:
• Excellent film-breaking capability of the beveled lip design
• The higher level of lip loading provided by the Type B offers maximum salability
• The long body of the design provides maximum stability
Piston Sealing with PolyPak Seal
Piston seals can be classified in two categories: single-acting and double-acting. The single acting seal is only required to seal in a single direction as system pressure is seen on only one end of the piston (return of the piston in a single-acting system is accomplished either by gravity or spring loading). The double-acting cylinder requires that the piston be sealed in both directions of stroke as system fluid is applied to one side or the other to achieve movement.

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More Sealing Products – Fluid Power & Pneumatic Seals

Parker Hannifin Corporation is launching a new, interactive digital reference guide to enhance and broaden the customer reach of the existing Parker O-Ring Handbook. For more than 50 years, the Parker O-Ring Handbook has been an engineering staple of the sealing industry.

“I’m constantly amazed and honored at how often I run across it in unexpected places,” says Dan Ewing, Sr. Chemical Engineer and Materials Manager at Parker O-Ring Division, “I've come to expect to see a well-used copy sitting on a customer's desk, but I'm pleasantly surprised when I find it cited in academic papers, referenced in reports written by government agencies and discussed in industry association meetings.”

Since its debut in 1957, the handbook has become a fixture on the reference shelves of engineers and seal specifiers worldwide. According to Steven Weinzierl, Ph. D., Parker's Global e-Business Customer Support Manager, 'Parker's O-Ring Handbook is one of the world's most complete reference books for everything and anything related to the technology and application of O-rings. It is downloaded thousands of times a month from Parker's website, making it one of Parker's most downloaded knowledge assets.' Weinzierl observes, 'This new, interactive version should significantly increase the accessibility of this outstanding resource.'

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Parker is strengthening its dedication to premier customer service by enhancing its commitment to digital tools and communications. Ewing says, “The new eHandbook takes the next step in enhancing the customer experience by transforming the static PDF version of the handbook into an interactive and more user-friendly tool.”

Key components:

• Short, engaging animations

• Snippets of real material test procedures

• Direct links to accelerate the sales process

• Online Chat with an Engineer capability within each page

• Design analysis via Mobile inPHorm™ (Parker’s O-Ring Calculator)

The O-Ring eHandbook is expected to bridge the generation gap, filling the need for all learning and reference styles. The original formats of the printed catalog and searchable pdf will still remain available via Parker’s Catalog Services and the O-Ring Division website. The O-Ring eHandbook will provide visual learning, interesting excerpts and summarized information that makes finding what you need effortless. New content will be added as needed and because the format is web-based, content updates will become quicker and more efficient. 'I like the simplicity the eHandbook brings to O-ring design and material selection,' says Dorothy Kern, Parker O-Ring Division Applications Engineering Manager. 'The original handbook is rich with details for all elements of O-ring design, but 292 pages can be overwhelming to a new engineer. The eHandbook simplifies the main design concepts and utilizes updated graphics to illustrate just the highlights, making it a great resource.'

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For more information on the O-Ring eHandbook or other Parker O-Ring Division support tools, contact the experts at the O-Ring Division online or directly at 859-335-5101.

This article is contributed by Samantha J Sexton, Marketing Communications Manager,

Parker Hannifin O-Ring Division.

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