Unleashing Performance: Polypac's High-Temperature Ram Cylinder Seals for Extreme Conditions

Thursday, January 08, 2026
In demanding industrial environments where high temperatures are a constant challenge, the integrity of sealing solutions is paramount. This blog post explores how Polypac's advanced high-temperature ram cylinder seals, as depicted in our featured image, are engineered to deliver unparalleled reliability and efficiency, ensuring your operations run smoothly even under the most extreme thermal loads. Discover the cutting-edge design and material science behind our robust sealing solutions.
Unleashing Performance: Polypac's High-Temperature Ram Cylinder Seals for Extreme Conditions

The Unseen Battle: Why High-Temperature Seals Matter

Industrial applications, from steel mills and foundries to heavy machinery and power generation, frequently expose hydraulic and pneumatic systems to scorching temperatures. In such severe conditions, standard seals often degrade rapidly, leading to costly leaks, premature equipment failure, and significant downtime. The image prominently displays a multi-component seal, revealing a robust outer ring paired with a flexible inner element. This design hints at a sophisticated approach to sealing challenges, precisely what's needed for high-temperature ram cylinder seals. Investing in specialized, high-performance sealing solutions is not just an upgrade; it's a strategic necessity for maintaining industrial reliability and ensuring operational efficiency.

Advanced Design for Superior High-Temperature Performance

At Polypac, we understand that exceptional performance under extreme heat requires more than just a single material. Our high-temperature ram cylinder seals are a testament to our engineered sealing solutions. The product shown in the image clearly illustrates this principle: a sophisticated dual-material construction. The lighter, robust outer ring, likely made from a high-performance thermoplastic, serves as an anti-extrusion and wear-resistant element, providing crucial support to the darker, primary sealing component. This inner ring, typically an advanced elastomer, is specifically formulated to retain its elasticity and sealing force even when exposed to prolonged elevated temperatures. This multi-component seal design by Polypac optimizes pressure distribution and minimizes friction, guaranteeing optimal sealing performance in the most challenging environments.

Maximizing Uptime and Reducing Costs

Key Benefits for Your Operations

The strategic deployment of Polypac's high-temperature ram cylinder seals translates directly into tangible benefits for your bottom line. By preventing fluid leakage and protecting critical hydraulic components from thermal stress, our seals significantly extend the service life of your equipment. This reduces the frequency of maintenance, minimizes costly repairs, and virtually eliminates unscheduled downtime. Industries relying on continuous operation, such as metals processing, petrochemicals, and marine, can achieve unparalleled industrial efficiency and ensure reliable hydraulic seals. Our commitment to cost-effective sealing means you benefit from enhanced productivity and a safer working environment.

Your Trusted Partner for High-Performance Sealing

Why Choose Polypac?

Choosing Polypac means partnering with expert seal manufacturers who are pioneers in material science and innovative design. Our extensive experience in the seal manufacturing industry, coupled with rigorous testing and adherence to the highest quality standards, ensures that every Polypac product, including our high-temperature ram cylinder seals, delivers superior performance and unmatched reliability. We offer a comprehensive range of custom sealing solutions designed to meet your specific application requirements, providing the expertise and products you need to overcome any sealing challenge. Trust Polypac for advanced fluid power seals that stand the test of time and temperature.

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Air Seals
Air Seals
Precision Rod Seal
Precision Rod Seal
rotary seal​
rotary seal​
Guide Ring
Guide Ring
Excavator Rod Seal
Excavator Rod Seal
PTFE Tube
PTFE Tube
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Question you may concern
Products
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.
When should I use a spring-energized seal instead of a standard elastomeric seal?
Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.
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.
What is the difference between a static seal and a dynamic seal?
A Static Seal is used between two surfaces that do not move relative to each other (e.g., pipe flanges, end caps). O-rings and gaskets are common static seals. A Dynamic Seal is used between surfaces that do move (e.g., piston and cylinder, rotating shaft). Rod seals, piston seals, and rotary shaft seals are designed for this purpose.
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