Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
High - Performance SPN Shaft Seal for Industrial Hydraulics
Long - Lasting Seal to Minimize Downtime in Industrial Settings
The SPN shaft seal is a high-performance hydraulic sealing solution, combining a wear-resistant PTFE ring with an elastic rubber component to ensure reliable sealing for reciprocating shafts. Its design leverages preload and pressure compensation, enabling it to adapt to high-pressure conditions and prevent fluid leakage in industrial hydraulic systems, such as cylinders and mobile equipment.
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Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
Product Advantages
The SPN shaft seal offers a host of outstanding advantages. Its wear - resistant PTFE ring ensures a long service life even under frequent reciprocating motion of the shaft. The combination of the PTFE ring and the elastic rubber component enables it to withstand high pressures up to 35MPa, maintaining excellent sealing performance without leakage. Moreover, the low - friction property of the PTFE material reduces energy consumption during operation, and the seal has strong adaptability to different working conditions, ensuring stable performance in various hydraulic systems.
Product Principle
The sealing principle of the SPN shaft seal is based on two key aspects: preload sealing and pressure - compensated sealing. In the preload sealing stage, the elastic rubber component is squeezed by the installation groove, generating elastic deformation and applying a preload force to the PTFE ring. This makes the PTFE ring closely fit the shaft surface, blocking the medium leakage channel under low - pressure or static conditions. When the hydraulic system is under pressure, the pressure medium further pushes the PTFE ring, increasing the contact stress between the PTFE ring and the shaft surface, thus achieving effective sealing under high - pressure conditions, which is the pressure - compensated sealing.
Product Details
Structural Composition: The main structure consists of a PTFE wear - resistant ring and an elastic rubber ring. The PTFE ring is responsible for the main sealing function, and the rubber ring provides elastic preload.
Material Selection: The PTFE ring is made of high - quality filled PTFE, which has excellent wear resistance and low friction. The rubber ring can be made of NBR or FKM according to different working temperature requirements. NBR rubber is suitable for - 40℃ to + 100℃, and FKM rubber is suitable for - 20℃ to + 160℃.
Dimensional Requirements: The shaft matched with the seal needs to meet specific surface roughness (such as Rz12.5 (Pt12.5)) and chamfer (10° - 15°) requirements. The cavity has a corresponding installation groove with rounded transitions (including R, R₁, etc.) to ensure the stable installation and operation of the seal.
Application Range
The SPN shaft seal is widely used in various hydraulic systems, including excavators, standard oil cylinders, mobile hydraulic equipment, hydraulic presses, and other machinery. It is mainly used for sealing shaft - like components such as piston rods to prevent hydraulic oil leakage and ensure the normal operation of the equipment.
FAQ
Q: What is the maximum reciprocating speed that the SPN shaft seal can withstand?
A: The reciprocating speed of the SPN shaft seal is generally not more than 1.5m/s.
Q: How to install the SPN shaft seal correctly?
A: When installing, ensure that the shaft and the installation groove are clean and free of burrs. Apply a small amount of hydraulic oil to the seal and the shaft surface, then install the seal into the groove smoothly, avoiding violent collision or distortion.
Q: What factors will affect the service life of the SPN shaft seal?
A: The service life is affected by factors such as working pressure, temperature, shaft surface roughness, reciprocating speed, and the cleanliness of the hydraulic medium.
Enterprise Selling Points
Our company has advanced production technology and strict quality control system in the production of SPN shaft seals. We use high - quality raw materials to ensure the stability and reliability of the products. In addition, we can provide customized services according to the specific needs of customers, and have a professional after - sales team to provide technical support and solutions, ensuring that customers can use our products with confidence.
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