dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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Polypac Spherical Lip Wiper

Polypac Spherical Lip Wiper is a durable hydraulic wiper that keeps contaminants out of cylinders. Made from premium materials with custom options and strict quality control for long service life.

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Product Information

Product Overview

The Polypac Spherical Lip Wiper is a precision-engineered sealing component designed to protect hydraulic and pneumatic cylinders from dust, dirt, and liquid contamination. Its spherical lip geometry provides consistent contact with rod surfaces, ensuring effective wiping and extended system life. Designed for reliability in demanding environments, this wiper combines robust materials with advanced manufacturing processes.

Key Features

Unique spherical lip design for even wear and effective sealing
Low friction contact to reduce rod wear and power loss
Available in multiple compound options for temperature and chemical resistance
Precision molding and tight dimensional control for easy installation

Materials & Customization

Polypac manufactures Spherical Lip Wipers in a variety of materials to suit different working conditions. Common options include NBR, FKM, EPDM, silicone, and PTFE-filled grades. For harsh or special applications we offer custom blends and sizes. With an 8,000 m² production space and advanced testing equipment, we can tailor hardness, lip geometry, and tolerances to meet your requirements.

Benefits

Protects hydraulic systems from contaminants, reducing downtime and maintenance
Extends rod and seal life through consistent wiping action
Improves equipment reliability in abrasive, wet, or chemically aggressive environments
Custom options ensure optimal performance for special working conditions

Typical Applications

Ideal for construction machinery, agricultural equipment, mobile hydraulics, industrial cylinders, and any system where rod contamination affects performance. The Polypac Spherical Lip Wiper is suited to both standard and severe-duty uses.

Why Choose Polypac

Founded in 2008, Polypac is a technical leader in hydraulic seals and oil seals. Our factory and custom O-ring workshop cover more than 10,000 m², with industry-leading production and testing equipment. We began with filled PTFE products and now offer a wide range of rubber and PTFE-based seals. Long-term partnerships with universities and research institutions support our continuous material and process improvement. Choosing Polypac means choosing proven manufacturing quality, strict quality control, and reliable after-sales support.

Contact Polypac to specify Spherical Lip Wipers tailored to your equipment and working conditions, and ensure longer, trouble-free operation of your hydraulic systems.

Question you may concern

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

Can I reuse a seal?

We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.

What is the difference between NBR and FKM materials?

NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

If you have any other questions, please write email to us or call us , we will reply you ASAP.

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PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

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