Mobile Equipment Seals — Polypac Custom Hydraulic Seals
Mobile Equipment Seals by Polypac
Mobile Equipment Seals by Polypac deliver reliable sealing performance for hydraulic cylinders, axles, transmissions and rotating joints used in construction, mining, agriculture, and transportation. Combining our decades of material science expertise and factory-scale production, Polypac provides Mobile Equipment Seals engineered for abrasion, pressure spikes, temperature swings and contamination typical of heavy-duty mobile applications.
Industry-Leading Materials & Technology
Industry-Leading Materials & Technology: Polypac began with advanced filled PTFE (bronze, carbon, graphite, MoS₂, glass) and now produces O-rings and seals from NBR, FKM, silicone, EPDM and FFKM. Our material choices ensure low friction, long wear life and chemical compatibility for Mobile Equipment Seals operating under harsh field conditions.
Custom Design & Manufacturing Capacity
Custom Design & Manufacturing Capacity: With over 10,000 m² site area and 8,000 m² of production space, our custom rubber ring and O-ring factory scales to meet large projects. Polypac's design team develops bespoke Mobile Equipment Seals to fit unique housings, dynamic profiles and pressure requirements—reducing downtime and improving fleet reliability.
Advanced Testing & Quality Assurance
Advanced Testing & Quality Assurance: Polypac deploys industry-leading production and testing equipment to validate seal performance across temperature, pressure and contamination ranges. Each Mobile Equipment Seal undergoes rigorous testing to ensure consistent sealing, leak prevention and service life in real-world mobile equipment environments.
Collaborative R&D & Application Expertise
Collaborative R&D & Application Expertise: We maintain long-term partnerships with universities and research institutes domestically and internationally to refine sealing compounds and designs. This collaborative approach accelerates development of Mobile Equipment Seals tailored for specialty fluids, high-speed actuators and extreme duty cycles.
Why Choose Polypac?
Why Choose Polypac?: Choose Polypac for proven materials, scalable production, and customized sealing solutions that extend equipment life and reduce maintenance. Contact us to specify Mobile Equipment Seals optimized for your fleet—engineered, tested and delivered by a trusted hydraulic seal manufacturer.
Mobile Equipment Seals Display
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.
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.
Why did my O-ring fail prematurely?
Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.
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