Hydraulic
Cylinder
Seals

Hydraulic seals are one of the critical parts used in hydraulic systems to prevent fluid leakage and maintain pressure within the hydraulic cylinder.  We offer both standard and custom hydraulic  seals – produced on time at competitive prices.  We provide replacements for Parker, Trelleborg, Hallite, Hercules, and NOK.  If your application requires performance-driven seals for heavy-duty industrial applications or specialized machinery, we have you covered.  

Types of Hydraulic Seals We Offer at Independence Seal

At Independence Seal Company, we offer several varieties of hydraulic seals that meet the diverse needs of different industries and applications. The following are a few popular types of hydraulic cylinder seals offered under this category.

• Wipers/Metal Cased Wipers/Stepped Wipers: These seals are designed to be installed on the cylinder head, and protect hydraulic systems from external contaminants such as dust, dirt, and moisture, thereby avoiding damage to internal components. These seals are known to offer enhanced sealing capabilities and extra durability, especially in harsh conditions.
• Piston Seals: These seals create a tight seal between the piston and the cylinder wall. They prevent hydraulic fluid from leaking across the piston, ensuring a smooth and efficient operation of hydraulic machinery.
• V-Seals: Typically used on shafts, these seals offer reliable protection against contaminants like dust, dirt, and moisture. Their flexibility and ease of installation allow them to accommodate a variety of shaft diameters and misalignments.
• Rod Seals: Positioned on the external side of the cylinder head, these seals prevent hydraulic fluid from leaking out of the cylinder. They form tight a barrier that keeps the fluid securely within the cylinder, which in turn helps to maintain the system’s pressure and operational efficiency.
• O-Rings: These types of seals – a loop of elastomer with a disc-shaped cross-section – are known to create a tight seal between two surfaces to prevent fluid leakage. They can handle different temperature and pressure ranges – can seal tens of megapascals (thousands of psi) of pressure – making them widely applicable across industries.
• Guide Rings/Wear Rings: Generally used to support the piston and rod within a hydraulic cylinder, guide rings minimize friction and prevent metal-to-metal contact, reducing wear and tear on the cylinder components.
• Rotary Shaft Seals: Designed to seal rotating components in hydraulic systems, such as shafts and spindles, these seals help to maintain smooth operation and extend the lifespan of machinery. Our range of rotary shaft seals prevent fluid leakage and block contaminants while allowing for the rotational movement of the shaft.
• Spring Energized Seals: Comprised of high-performance elastomers—typically polytetrafluoroethylene – with a corrosion-resistant metal spring energizer, these seals work best for demanding environments. Metal spring applies constant pressure to the sealing lip, making them ideal for dynamic and static applications with varying pressures and temperatures.

Customization Capabilities

We know the demands on hydraulic systems can vary widely depending on the specific application. Here comes the advantage of our customized hydraulic seals tailored to meet the unique requirements of machinery and operating conditions. Our range of customized hydraulic cylinder seals will better address sealing challenges in extreme temperatures, high pressures, chemical exposure, and unique geometries.

Our customization capabilities include:

• Different Durometers: We know that our seals are used in different environments, where they must suit different pressure and wear resistance requirements. To offer superior performance, we strive to provide hydraulic seals in various hardness levels (durometers). For instance, our O-rings are available in thickness ranges from 20 to 80 durometer.
• Design Specifications: Our experts can create custom profiles and geometries to meet unique requirements and diverse sealing challenges of customers. 
• Materials: Being an experienced hydraulic seals supplier, we can offer these seals in different types of materials including:
• Elastomers: We utilize several elastomers – chemically cross-linked by the vulcanization process – including Nitrile (NBR), Viton (FKM), and EPDM to manufacture these hydraulic seals.
• Polyurethanes: We have immense expertise with Polyurethanes, which are known for their excellent abrasion resistance and load-bearing capabilities.
• PTFE (Teflon): Owing to their exceptional chemical resistance and low friction, PTFE is used to make seals that are meant for use in extreme temperatures and aggressive fluids.
• Metal-Backed Seals: These seals combine the resilience of elastomers with the strength of metal, suitable for high-pressure applications.
• Sizes: We can manufacture seals in a wide range of standard and metric sizes, from small, precision seals for delicate equipment to large, robust seals for industrial machinery.
• Compliance with Industry Standards: For industries with stringent regulatory requirements, such as food and beverage, medical, or aerospace, we provide seals that comply with relevant standards, ensuring safety and reliability.

Manufacturing and Other Notable Capabilities

At Independence Seals, our advanced manufacturing capabilities, and commitment to quality enable us to deliver the highest-quality hydraulic seals to meet your specific demands. Our capabilities in hydraulic cylinder seal making are listed below.  

• Prototype Seals and Small Volume Orders: We can provide prototype seals along with small volume orders. This service enables our customers to test and validate new designs before starting with full-scale production.
• Replacing Obsolete Seals: We also focus on replacing obsolete seals, ensuring the continuity and reliability of legacy systems. Our team of experts can reverse-engineer and create the finest-quality seals for older equipment where original parts are no longer available.
• Range of Manufacturing Methods: Our fully-equipped manufacturing facility employs several methods to produce high-quality seals. These include:
• Machined Seals: Ideal for producing custom designs and small batches with precise tolerances.
• Molded Seals: Suitable for larger production runs, providing consistency and efficiency.
• Quality and Standards: We impose strict quality control measures at every production stage, starting from raw material inspection to final product testing. We have advanced testing equipment and stringent protocols in place, enabling us to produce customized seals offering unmatched performance and reliability.
• Production Timelines: With us, your project timelines are met strictly. We offer an expedited order process for urgent requirements. Additionally, for large volume orders or complex seal requirements, our standard production times – within 4 to 6 weeks – are designed to balance efficiency and precision.
• Certifications and Industry Standards: Our commitment to quality is demonstrated through various industry standards and certifications. We adhere to ISO 9001:2015 for quality management systems, and industry-specific standards, such as FDA and AS9100.

Applications and Industries Served

Our range of hydraulic cylinders find applications in the following industries:

• Manufacturing and Industrial Machinery: Hydraulic seals are widely used in injection molding machines, presses and stamping machines, and machine tools.
• Agriculture and Farming: They ensure the reliable performance of tractors and harvesters, hydraulic pumps and valves in irrigation systems.
• Marine: Hydraulic seals find immense applications in winches, cranes, and other deck equipment, along with marine steering systems and other subsea hydraulic systems.
• Automotive: They find applications in brake systems, power steering and hydraulic transmission systems.
• Aerospace: Landing gear systems, flight control systems, actuators and cylinders, among others, can benefit from the seals we offer.
• Construction and Heavy Equipment: They are utilized for the smooth functioning of excavators and backhoes, cranes and lifting equipment, bulldozers and loaders, among others.

With years of experience in this field and knowledge of numerous materials, we can offer hydraulic seals that are precisely engineered to enhance the performance and longevity of your hydraulic systems and equipment. Our combine their expertise and unmatched customer assistance to bring you the best type of hydraulic cylinder seals that serve your purpose cost-effectively.