Cylinder Repair Kit — Durable, Custom Sealing Solutions by Polypac
Cylinder Repair Kit — Reliable Sealing Solutions from Polypac
Product Overview
Polypac Cylinder Repair Kit provides a complete set of replacement seals and components designed to restore hydraulic cylinder performance quickly and reliably. Each kit includes precision-molded O-rings, rubber rings, PTFE guide seals (bronze/carbon/graphite-filled options), wipers, and backup rings chosen to match common bore sizes and operating pressures.
Key Features & Benefits
Our Cylinder Repair Kit combines material science and manufacturing excellence—low-friction filled PTFE for extended life, high-grade NBR and FKM O-rings for pressure resistance, and purpose-built wipers to prevent contamination. Benefits include reduced downtime, lower lifecycle costs, improved sealing under extreme temperatures, and easier field installation.
Materials & Compatibility
Polypac leverages decades of expertise in sealing materials: filled PTFE (bronze, carbon, graphite, MoS₂, glass), NBR, FKM, EPDM, silicone, and FFKM. Kits are specified for hydraulic oil, water-glycol, phosphate ester, and aggressive media. Material choices are matched to cylinder geometry and chemical compatibility to maximize reliability.
Customization & Quality Assurance
With an 8,000 m² production area within a 10,000 m² facility, Polypac offers custom Cylinder Repair Kits for special working conditions. Our advanced production and testing equipment, and partnerships with universities and research institutions, ensure consistent tolerances, certified testing, and tailored solutions for OEMs and maintenance teams.
Applications & Ordering
Ideal for construction, agriculture, mining, material handling, and industrial hydraulics, Polypac Cylinder Repair Kits simplify maintenance and extend cylinder service life. Contact Polypac for catalog kits, custom sets, or rapid quote—support includes application review, material selection, and delivery scheduling.
Why Choose Polypac
Founded in 2008, Polypac is a scientific and technical leader in seal manufacturing. Our award-winning approach to sealing material development and customized solutions means your Cylinder Repair Kit is engineered for peak performance and long-term value.
Cylinder Repair Kit Display
What does "AS568" mean?
AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.
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.
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 purpose of the metal spring in a rotary shaft seal?
The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.
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