26 mm Large-Aperture Adapter Seal for High-Performance Gas Springs and Dampers

The 26 mm Large-Aperture Adapter Seal is a specialized Y-type oil seal ring developed for gas springs, dampers, and other rod-guided mechanical systems that require reliable sealing around a large-diameter shaft. Designed for an application involving a 25 mm steel pipe inner diameter and a 16 mm piston rod diameter, this compact sealing component combines an optimized sealing profile, an NBR elastomer body, and an O-ring adapter arrangement to support stable operation across a design pressure range of 50 to 2000 N.

Large-rod sealing applications place unusual demands on an oil seal. The seal must accommodate the movement of the piston rod, maintain contact against the working surface, minimize friction, resist heat generated during repeated movement, and prevent the escape of internal gas or oil. At the same time, the component must fit within a limited installation space and maintain consistent performance over a long service life. The 26 mm Large-Aperture Adapter Seal was developed specifically around these requirements.

Its product code is A-1-031, and its nominal specifications are 26 mm outside diameter, 15.3 mm inside diameter, and 4 mm height. The design also uses a 25 mm by 2.4 mm O-ring adapter. This arrangement allows the seal to support a large-aperture configuration while maintaining a controlled sealing interface around the piston rod. The result is a compact, application-focused solution for manufacturers and users seeking dependable sealing performance in gas springs and dampers.

26mm Large-Aperture Adapter Seal

Product Overview

A Y-type oil seal ring typically uses a flexible sealing geometry that forms one or more sealing lips around a moving shaft or piston rod. The shape allows the seal to respond dynamically to changes in pressure and movement. When installed correctly, the sealing lips remain in controlled contact with the rod surface, limiting leakage while avoiding unnecessary resistance.

The 26 mm Large-Aperture Adapter Seal is designed for large-rod applications rather than general-purpose static sealing. Its working configuration is associated with a 25 mm steel pipe inner diameter and a 16 mm piston rod diameter. The adapter format helps bridge the dimensional relationship between the housing, the rod, and the sealing element. This makes it suitable for equipment in which a standard small-aperture oil seal would not offer sufficient coverage or installation compatibility.

The seal has an outside diameter of 26 mm and a height of 4 mm. Its nominal inner diameter is 15.3 mm, while the complete configuration includes a 25 mm by 2.4 mm O-ring adapter. These dimensions are important because seal performance depends not only on the material but also on the relationship between the seal, the rod, the housing, and the supporting adapter. A carefully matched assembly can improve stability, reduce the risk of extrusion, and support consistent movement.

Core Product Data

Item	Specification
Product name	26 mm Large-Aperture Adapter Seal
Seal type	Y-type oil seal ring
Product code	A-1-031
Product specifications	26 × 15.3 × 4 mm
Outside diameter	26 mm
Inside diameter	15.3 mm
Height	4 mm
O-ring adapter	25 × 2.4 mm
Applicable steel pipe inner diameter	25 mm
Applicable piston rod diameter	16 mm
Design applicable pressure range	50–2000 N
Primary material	NBR

The stated pressure range should be understood as a design application range rather than a universal operating guarantee for every assembly. Actual performance depends on the gas spring or damper structure, rod finish, lubrication, temperature, installation quality, media compatibility, and duty cycle. System designers should verify the complete operating conditions before final selection.

Why Large-Aperture Sealing Requires a Dedicated Design

A large piston rod changes the mechanical conditions around a seal. As rod diameter increases, the sealing circumference also increases. This can create greater total friction if the lip geometry is not properly optimized. A larger rod may also transfer more heat into the seal during rapid reciprocating movement. In addition, a large-aperture housing may require an adapter system to create the correct sealing dimensions without increasing the overall assembly size.

A conventional oil seal selected only by approximate diameter may not provide the required balance between sealing force and movement resistance. If the sealing lip is too tight, the rod may experience excessive friction, heat, and wear. If the lip is too loose, leakage and pressure loss can occur. The seal must therefore be matched to the rod diameter, housing geometry, pressure level, surface finish, lubrication conditions, and movement speed.

The A-1-031 configuration addresses these considerations through a dedicated large-aperture arrangement. Its Y-type profile is intended to provide controlled contact, while the O-ring adapter supports the relationship between the seal and the surrounding structure. The compact 4 mm height helps preserve installation space, which is particularly useful in gas spring and damper designs where the end assembly has limited room.

Movement, Friction, and Sealing Balance

In a moving-rod application, friction is not automatically undesirable. A seal must create sufficient contact to prevent leakage. The engineering objective is controlled friction rather than zero friction. The 26 mm Large-Aperture Adapter Seal is described as maintaining the required sealing function while optimizing inner friction for large shaft movement.

Lower and more stable friction can provide several practical advantages. It can help reduce the force required to initiate rod movement, support smoother extension and compression, reduce heat generation, and limit unnecessary wear on the sealing lip. These benefits are particularly relevant in furniture gas springs, automotive support systems, dampers, and other mechanisms that are operated repeatedly or require predictable motion.

Because actual friction depends on the complete system, the seal should be evaluated together with the piston rod finish, lubricant, pressure, temperature, stroke, and movement speed. Nevertheless, a seal profile designed specifically for the intended rod size offers a stronger starting point than a generic component selected without regard to application geometry.

Material Selection: NBR for Practical Sealing Performance

The primary material specified for the product is NBR, or nitrile butadiene rubber. NBR is widely used in oil seals and O-rings because it provides a practical combination of oil resistance, elasticity, abrasion resistance, and cost efficiency. These properties make it a common choice for gas springs, dampers, hydraulic-related components, automotive assemblies, furniture hardware, and industrial equipment.

NBR is particularly suitable where the sealing element may encounter lubricating oil or other petroleum-based media compatible with the selected compound. Its elastic behavior allows the sealing lip to maintain contact with a moving rod while accommodating small dimensional variations and ordinary assembly tolerances. Its abrasion resistance is also useful in repeated sliding applications.

Material selection should always be based on the actual operating medium and temperature. NBR is not automatically suitable for every fluid, chemical, or extreme-temperature environment. If the application involves special oils, aggressive chemicals, unusually high temperatures, ozone exposure, or demanding low-temperature conditions, an alternative compound such as HNBR or FPM may be considered after technical evaluation. The company’s stated product capabilities include NBR, HNBR, and FPM O-ring products, allowing material selection to be aligned with different service conditions.

Benefits of the NBR Compound in This Application

For the intended large-rod gas spring and damper application, NBR offers several practical advantages:

First, its elasticity supports continuous contact between the sealing lip and piston rod. This is important because the rod is not stationary; the seal must respond to movement while maintaining an effective barrier.

Second, NBR generally provides good resistance to lubricating oils used in many mechanical assemblies. Maintaining compatibility with the internal lubricant can help reduce swelling, hardening, or loss of flexibility.

Third, the material offers useful abrasion resistance for repeated rod movement. A seal that remains resilient and dimensionally stable can help extend service intervals and reduce the likelihood of premature leakage.

Fourth, NBR is widely available and can be processed efficiently in industrial production. This supports consistent supply, reasonable production economics, and the ability to manufacture customized dimensions for different equipment designs.

Heat Dissipation and High-Speed Performance

Repeated movement generates heat at the interface between the sealing lip and the rod. Heat may also be transferred from the internal gas, oil, cylinder wall, or nearby mechanical components. If heat accumulates excessively, an elastomer can lose hardness, become less elastic, or experience accelerated aging. The seal’s geometry and the surrounding assembly must therefore support appropriate heat management.

The 26 mm Large-Aperture Adapter Seal is developed for good heat dissipation and high-speed performance. Its intended use with large shaft movement means that the design must consider the relationship between contact pressure, friction, surface speed, and thermal behavior. A seal that controls friction effectively can reduce the amount of heat generated at the sliding interface. A compact profile can also help fit the seal into an assembly where heat must be managed within a limited space.

High-speed performance does not mean that the seal can operate at any speed or temperature without validation. Instead, it indicates that the product concept is directed toward applications involving rapid or repeated rod movement. The actual limit will depend on the rod surface, lubricant, pressure, stroke frequency, ambient temperature, and equipment design.

For production equipment, manufacturers can evaluate the seal through endurance testing that measures leakage, friction force, temperature rise, lip wear, and dimensional change. Such testing is especially valuable when the gas spring or damper will be installed in a high-cycle application, where small differences in friction or heat generation can become significant over time.

Design Advantages Compared with Generic Alternatives

Many oil seal rings may appear similar in a catalog, but small differences in profile, dimensions, material, and installation method can have a meaningful effect on performance. The 26 mm Large-Aperture Adapter Seal offers several design advantages over a generic seal that is not specifically intended for a 25 mm housing and 16 mm piston rod arrangement.

Application-Specific Dimensional Matching

The product is designed around a defined assembly relationship rather than a single nominal diameter. The 25 mm steel pipe inner diameter, 16 mm piston rod diameter, 26 mm outside diameter, and 25 mm by 2.4 mm adapter form a coordinated configuration. This reduces the need for users to improvise with unrelated components and helps engineers evaluate the sealing system as a complete dimensional solution.

Large-Rod Compatibility

Large piston rods require a seal with suitable inner geometry and adequate support. A small-rod seal may not provide the correct lip position, contact pattern, or installation stability. The A-1-031 is purpose-oriented toward large-aperture applications, making it more relevant for equipment using 16 mm piston rods than a general seal designed for smaller shafts.

Controlled Friction

The product is developed with optimized inner friction in mind. This can be important when the end user expects smooth movement, low operating effort, and consistent force. In furniture gas springs, for example, excessive seal friction can affect the user’s perception of opening and closing. In dampers and industrial mechanisms, unstable friction can influence motion control and response consistency.

Compact Installation Height

At 4 mm in height, the seal is suitable for assemblies where axial space is limited. A compact seal can help equipment designers preserve cylinder length, reduce end-fitting size, or allocate more space to other internal components. Compactness is especially useful when the seal must be integrated into a standardized housing or retrofit design.

Adapter-Based Configuration

The 25 mm by 2.4 mm O-ring adapter provides an additional dimensional interface within the assembly. This can support improved positioning and help the seal function within the intended housing geometry. An adapter-based arrangement may also simplify the development of product families that use a common housing concept with different rod or seal configurations.

Material and Customization Options

The standard product uses NBR, a practical material for many oil and gas spring applications. At the same time, the manufacturer’s capability in NBR, HNBR, and FPM products creates a foundation for selecting alternative elastomers when a project requires different resistance characteristics. Customization may include dimensions, compound selection, sealing profile, testing, and technical support, subject to engineering review.

Manufacturing Strengths and Production Capabilities

The quality of a sealing ring depends on much more than the design drawing. Elastomer preparation, mold precision, curing control, trimming, inspection, storage, and packaging all influence the final product. Ningguo Jnsseals Sealing Technology Co., Ltd. is described as a high-tech enterprise founded in 2019 and focused on sealing technology for gas springs, dampers, and related O-ring products.

The company combines research and development, production equipment, and technical service capabilities. This integrated approach is valuable for customers who need more than a standard catalog component. A sealing project may begin with a dimensional requirement and progress through material selection, profile development, sample production, testing, and mass production. Having these capabilities connected within one supplier can reduce communication gaps and shorten the path from concept to finished component.

Compound Preparation and Material Control

Elastomer performance begins with the formulation. NBR compounds may be adjusted to achieve the required balance of hardness, elasticity, tensile strength, compression behavior, oil resistance, and wear performance. A reliable production process requires controlled weighing of raw materials, thorough mixing, and appropriate storage before molding.

Material control is particularly important for small sealing components because minor changes in hardness or cure state may influence friction and leakage. Consistent compound preparation helps ensure that different production batches remain close to the approved sample. For projects requiring HNBR or FPM, compound selection can be adapted to provide improved heat, chemical, or environmental resistance where appropriate.

Precision Molding

The dimensions of the A-1-031 seal are compact, and its sealing lips must be formed accurately. Precision molding helps create a consistent outside diameter, inside diameter, height, lip geometry, and adapter interface. Mold design must also account for material flow, shrinkage, parting lines, flash, and release from the cavity.

Consistent molding is important because a small deviation in the lip can alter contact pressure. Too much material may increase friction, while insufficient material may reduce sealing reliability. A controlled molding process supports repeatability across production lots and helps customers maintain consistent assembly conditions.

Vulcanization and Cure Control

Rubber components obtain their final elastic properties through vulcanization. Temperature, time, pressure, and compound characteristics must be controlled to achieve an appropriate cure state. Under-cured rubber may lack strength and dimensional stability, while over-curing can reduce flexibility or create undesirable hardness.

For a moving oil seal, cure consistency contributes to stable lip recovery and resistance to permanent deformation. Proper vulcanization also supports the seal’s ability to remain resilient after repeated movement. Production monitoring and sample testing can help identify variations before components reach the customer.

Flash Removal and Finishing

After molding, excess rubber may remain around the parting line or other areas of the component. Controlled trimming and finishing remove unwanted flash without damaging the sealing lip. This step is critical because even a small piece of residual material can interfere with installation, increase friction, or create a leakage path.

Visual inspection, dimensional inspection, and functional checks can be used to verify that the finished seal meets the required standard. The exact inspection plan may vary according to customer requirements and product volume, but critical dimensions should receive particular attention.

Inspection and Quality Assurance

Quality assurance for oil seals commonly includes dimensional measurement, appearance inspection, material or hardness checks, and performance testing. For the 26 mm Large-Aperture Adapter Seal, important checkpoints may include the 26 mm outside diameter, 15.3 mm inside diameter, 4 mm height, adapter dimensions, lip condition, surface quality, and overall concentricity.

Performance validation may include leakage testing, reciprocating movement testing, friction measurement, pressure testing, and aging evaluation. These tests help determine whether the seal remains functional under conditions representative of the customer’s equipment. A structured quality system also supports traceability, corrective action, and continuous process improvement.

Research and Development Support

Sealing performance is highly dependent on the application. A product that performs well in one gas spring may require modification for another because of differences in pressure, stroke, rod finish, temperature, lubricant, or assembly structure. For this reason, a supplier with application-focused research and development capabilities can provide greater value than a supplier offering only standard dimensions.

The company’s stated focus on sealing technology for gas springs and dampers gives it relevant experience in applications involving moving rods, internal pressure, repeated cycles, and compact end assemblies. Technical support may include drawing review, product selection, sample development, material recommendations, testing, and consultation regarding installation.

Customization can be especially useful when a customer is developing a new gas spring or damper rather than replacing an existing seal. Engineers can consider the available housing space, rod diameter, desired movement force, pressure range, lubrication method, and expected service life. The seal can then be evaluated as part of the entire product rather than treated as an isolated component.

From Prototype to Mass Production

A professional development process generally begins with a clear application specification. This may include the rod and housing dimensions, movement type, stroke length, pressure, temperature, medium, speed, duty cycle, and expected life. Based on this information, the supplier can recommend a standard part or develop a customized design.

Prototype samples allow the customer to confirm fit and assembly. Functional testing can then identify any issues involving friction, leakage, installation force, or wear. If modifications are required, the profile or material can be adjusted before production tooling is finalized. Once the design is approved, manufacturing controls can be established for repeatable volume production.

This development path offers an advantage over selecting an off-the-shelf product solely by diameter. It reduces the risk that the seal will fit physically but fail to provide the required operating performance.

Application Areas

The 26 mm Large-Aperture Adapter Seal is intended for equipment using large moving rods and compact sealing structures. Its design characteristics make it relevant to several industries.

Gas Springs

Gas springs are used to assist lifting, opening, positioning, and controlled movement. They appear in furniture, automotive components, office equipment, medical equipment, access panels, and industrial machinery. The seal helps retain internal gas and lubricant while allowing the piston rod to move through the cylinder.

In furniture gas springs, smooth motion and consistent force are important to the user experience. In automotive or industrial applications, durability and resistance to repeated cycling may be more prominent requirements. The A-1-031 configuration is suited to projects involving a 25 mm cylinder inner diameter and a 16 mm piston rod, subject to complete system validation.

Dampers

Dampers regulate movement by controlling the flow of energy during compression and extension. They may be used in seating systems, cabinets, automotive mechanisms, construction equipment, and industrial machinery. The seal helps keep the working medium within the damper while allowing controlled rod movement.

Because damper response can be sensitive to friction, a seal with optimized inner contact can help support more predictable movement. The final effect will depend on the damper’s internal valve design, fluid characteristics, and operating conditions, but the sealing element remains an important part of the system.

Furniture Hardware

Adjustable chairs, recliners, lifting tables, cabinets, and storage systems often use gas springs or dampers. These products may be operated many times each day and must provide a smooth, quiet, and reliable user experience. A compact large-aperture seal can support the design of robust hardware without requiring a large end assembly.

Automotive and Transportation Components

Automotive applications can include tailgate supports, hood supports, seat mechanisms, access panels, and other gas spring systems. Such products may experience temperature variation, vibration, repeated cycling, and exposure to oils or environmental contaminants. Material compatibility, installation quality, and testing are especially important in these applications.

Medical and Technical Equipment

Medical beds, examination tables, equipment stands, and positioning mechanisms may use gas springs or dampers to assist movement. These systems often require controlled operation and dependable performance. A sealing solution can be selected according to the equipment’s cleaning environment, temperature range, movement cycle, and applicable safety requirements.

Installation Considerations

Even a well-designed oil seal can perform poorly if it is installed incorrectly. Before assembly, the housing and rod should be checked for burrs, sharp edges, contamination, and damage. The piston rod should have an appropriate surface finish and should be free from rust, scratches, dents, or particles that could cut or abrade the sealing lip.

The seal should be oriented according to the product drawing and pressure direction. Y-type seal profiles often have a functional lip geometry that must face the correct side of the pressure or working medium. Installing the seal in the wrong direction may cause leakage or abnormal friction.

Lubrication should be compatible with the NBR material and the internal medium. A suitable lubricant can reduce installation damage and support initial movement, but excessive lubricant or an incompatible substance may cause swelling, softening, or performance changes. The customer should confirm lubricant compatibility before production assembly.

Tools used for installation should not contact the sealing lip with sharp edges. Pressing force should be applied evenly, and the seal should not be twisted or rolled during insertion. If an O-ring adapter is used, it should be installed without stretching beyond its intended dimensions or pinching between mating components.

Recommended Pre-Assembly Checks

Verify that the housing inner diameter corresponds to the intended 26 mm seal outside diameter and that the assembly is appropriate for the stated 25 mm steel pipe inner diameter and 16 mm piston rod configuration.

Confirm that the seal dimensions, including the 15.3 mm inner diameter and 4 mm height, match the approved drawing and installation space.

Inspect the piston rod for surface defects, contamination, corrosion, and sharp transitions that could damage the lip.

Check the O-ring adapter dimensions and ensure that the adapter is seated uniformly within the housing.

Apply only a compatible lubricant and avoid contaminating the sealing surface with dust or metal particles.

After installation, perform a low-speed movement check before placing the assembly into full-duty service.

Performance Evaluation and Quality Testing

A practical evaluation program should reproduce the customer’s real operating conditions as closely as possible. Testing only at room temperature and low speed may not reveal issues that appear during fast, repeated movement or temperature changes.

Leakage testing can determine whether the seal retains gas or oil during static pressure and dynamic movement. Friction testing can measure breakaway force and running force. These results are useful for comparing different seal materials or profiles and for confirming that the product does not create excessive resistance.

Endurance testing can simulate repeated extension and compression cycles. After testing, the seal can be inspected for lip wear, hardening, cracking, deformation, and loss of dimensional stability. Rod surface condition should also be recorded because wear may result from an interaction between the seal and the rod rather than from the seal alone.

Temperature testing can help evaluate performance under cold-start and elevated-temperature conditions. NBR is suitable for many conventional applications, but the actual limits depend on the compound and system. If the product will be exposed to higher temperatures or demanding chemical environments, HNBR or FPM may be considered after technical consultation.

Important Variables for Testing

Variable	Why It Matters
Rod diameter	Determines lip contact and dimensional fit.
Housing diameter	Controls outside support and installation stability.
Pressure or load	Influences sealing force and extrusion risk.
Movement speed	Affects friction, heat generation, and wear.
Stroke length	Determines the sliding distance per cycle.
Cycle frequency	Influences cumulative heat and fatigue.
Lubricant	Determines friction and material compatibility.
Temperature	Changes elastomer hardness, flexibility, and aging rate.
Rod surface finish	Influences leakage, abrasion, and lip life.

Supply and Customization Advantages

Customers purchasing seals for production equipment often need stable supply, consistent dimensions, and responsive technical communication. A supplier that understands the end application can provide more useful support than a distributor that only supplies a nominal size.

Ningguo Jnsseals Sealing Technology Co., Ltd. provides sealing products for customers in automotive, furniture, home appliance, medical equipment, construction, and other industries. Its stated services include customized sealing solutions, product design, testing, and technical consultation. These capabilities can be valuable when the customer requires a modification to the standard A-1-031 design or needs support integrating the seal into a new product.

Customization may involve the seal’s material, hardness, lip profile, adapter dimensions, color, packaging, or inspection requirements. The correct approach depends on the customer’s application and production volume. A technical review should be completed before any change is made, because modifications to one dimension can affect friction, pressure resistance, assembly force, or service life.

For international customers, clear product identification is also important. The A-1-031 product code, dimensional specification, material designation, and application information provide a useful basis for quotations, sample approval, purchase orders, and quality records.

Why Choose a Purpose-Built Adapter Seal

A seal is a small component, but its role in a gas spring or damper is critical. Leakage can reduce force, change motion behavior, contaminate surrounding parts, and shorten product life. Excessive friction can make operation difficult and increase heat. Poor dimensional fit can cause installation problems or premature failure.

A purpose-built adapter seal addresses these risks by considering the application as a connected system. The 26 mm Large-Aperture Adapter Seal is not simply a ring with a nominal outside diameter. It is a coordinated solution for a defined large-rod configuration, incorporating the seal profile, NBR material, compact height, and O-ring adapter dimensions.

Compared with an unsuitable generic alternative, it can offer better dimensional relevance, more appropriate contact geometry, and a clearer path to validation. Its design is particularly useful for engineers who need a compact sealing component for a 25 mm housing and 16 mm piston rod arrangement.

Purchasing and Engineering Checklist

Before ordering, customers should confirm the required product code, dimensions, material, quantity, and intended application. The product code for this design is A-1-031. The principal dimensions are 26 mm outside diameter, 15.3 mm inside diameter, and 4 mm height, with a 25 mm by 2.4 mm O-ring adapter.

The customer should also provide information about the working medium, pressure, temperature, movement speed, stroke, cycle frequency, rod surface, lubrication, and expected service life. This information allows the supplier to confirm whether the standard NBR version is appropriate or whether an alternative material or customized profile should be considered.

For new projects, sample testing should be completed before mass production. The seal should be evaluated in the actual or representative gas spring or damper assembly rather than in isolation. Fit, friction, leakage, movement force, and endurance should all be considered.

Q&A

What is the 26 mm Large-Aperture Adapter Seal?

It is a Y-type oil seal ring designed for large-rod gas spring and damper applications. The product has a 26 mm outside diameter, a 15.3 mm inside diameter, and a 4 mm height. It is identified by product code A-1-031.

What piston rod size is this seal designed for?

The stated application uses a 16 mm piston rod and a 25 mm steel pipe inner diameter. The complete assembly should be checked against the approved drawing and actual housing design before installation.

What is the purpose of the O-ring adapter?

The 25 mm by 2.4 mm O-ring adapter helps establish the intended dimensional relationship between the seal and the surrounding housing. It supports the adapter-based sealing configuration and can assist with positioning and assembly stability.

What material is used?

The standard product is made from NBR, or nitrile butadiene rubber. NBR is widely used for oil seals because of its elasticity, oil resistance, abrasion resistance, and practical cost. Material compatibility should be verified for the specific lubricant and operating environment.

What pressure range is associated with the product?

The design applicable pressure range is listed as 50 to 2000 N. This value should not be treated as a universal operating guarantee. Actual suitability depends on the complete gas spring or damper design, including pressure, temperature, rod finish, lubrication, and movement conditions.

Can the seal be used in high-speed applications?

The product is developed for large shaft movement and high-speed performance, with attention to optimized inner friction and heat dissipation. The actual allowable speed must be established through testing under the customer’s operating conditions.

Why is friction important in a gas spring or damper?

The seal must create enough contact to prevent leakage, but excessive contact can increase operating force, heat, and wear. Controlled friction helps support smoother movement and more predictable equipment performance.

Can alternative materials be supplied?

The company provides NBR, HNBR, and FPM O-ring products and can evaluate material options for different applications. HNBR or FPM may be considered when higher heat resistance, improved chemical resistance, or other special properties are required.

What should be checked before installation?

Check the housing and rod dimensions, rod surface condition, seal orientation, adapter fit, lubricant compatibility, and absence of burrs or contamination. The seal should be installed with suitable tools and without twisting or damaging the sealing lip.

Is this product suitable for all oil-based systems?

No. NBR is compatible with many commonly used oils, but compatibility depends on the exact fluid, additives, temperature, and exposure time. The working medium should be reviewed before final selection.

Can the product be customized?

Customized sealing solutions may be available, including product design, material selection, testing, and technical consultation. Customers should provide detailed application information so that any modification can be evaluated properly.

What industries can use this seal?

Potential industries include gas spring manufacturing, dampers, automotive components, furniture hardware, home appliances, medical equipment, construction equipment, and other mechanical systems using moving rods.

Conclusion

The 26 mm Large-Aperture Adapter Seal is a compact, application-specific sealing solution for gas springs, dampers, and related moving-rod mechanisms. Its 26 × 15.3 × 4 mm dimensions, 25 × 2.4 mm O-ring adapter, NBR material, and compatibility with a 25 mm housing and 16 mm piston rod provide a coordinated design for large-aperture applications.

Its main advantages include optimized inner friction, support for large shaft movement, good heat dissipation, high-speed application potential, and compact installation height. These features make it more relevant to large-rod systems than a generic seal selected only by approximate diameter.

The product is supported by a manufacturer focused on sealing technology for gas springs, dampers, and O-ring products. Research and development, material capabilities, precision molding, testing, customization, and technical service provide a foundation for stable production and application-specific engineering support.

For the best result, the seal should be selected and tested as part of the complete gas spring or damper assembly. When the rod, housing, pressure, lubricant, temperature, movement speed, and installation method are properly matched, the A-1-031 design can contribute to reliable sealing, smooth movement, and long-term mechanical performance.

References

1. Product specification for the 26 mm Large-Aperture Adapter Seal, product code A-1-031.

2. Technical information supplied for the 25 mm steel pipe inner diameter and 16 mm piston rod application.

3. General engineering principles for Y-type oil seal rings and reciprocating rod seals.

4. General material guidance for NBR, HNBR, and FPM elastomer sealing compounds.

5. General practices for elastomer molding, vulcanization, trimming, dimensional inspection, and seal performance testing.

6. General design considerations for gas springs, dampers, reciprocating rods, and compact adapter sealing systems.

Product: 26mm Large-Aperture Adapter Seal