SKF MD-L Double-Acting Piston Seal

Description

The SKF MD 125X100X25.4-L is a high-performance, five-piece double-acting compact piston seal designed for demanding hydraulic applications. Its robust construction ensures reliable sealing, low friction, and excellent resistance to wear and extrusion. This seal is engineered by SKF Sealing Solutions to provide a long service life and maintain system efficiency in hydraulic cylinders.

Specifications

• Manufacturer: SKF
• Type: MD-L Compact Piston Seal
• Inner Diameter (d): 100 mm
• Outer Diameter (D): 125 mm
• Height (L): 25.4 mm (1 inch)
• Material: Multi-component (NBR, TPC, POM)
• Action: Double-Acting

Label Info

• Model: MD 125X100X25.4-L
• Date Code: 13-09-10

Application

This seal is ideal for use as a piston seal in a wide range of hydraulic cylinders, including those found in construction machinery, agricultural equipment, material handling, and general industrial machinery.

Country of Origin

Sweden. Note: Manufacturing location can vary between SKF global facilities.

CO2 Impact

Opting for this component helps avoid approximately 3.0 kg of CO2 emissions compared to a new production, contributing to a more sustainable industrial operation.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

Question?
What are the main materials used in the SKF MD-L seal?

Answer: The SKF MD-L is a five-piece seal. It typically consists of a central sealing element made from Nitrile rubber (NBR), two support rings made from thermoplastic polyester elastomer (TPC), and two guide rings made from polyacetal (POM). This combination provides excellent sealing, wear resistance, and extrusion resistance.

Question?
Is this seal suitable for high-pressure hydraulic applications?

Answer: Yes, the MD-L profile is specifically designed as a compact, double-acting piston seal for hydraulic cylinders. Its multi-part design with anti-extrusion rings makes it robust and suitable for medium to heavy-duty applications, capable of handling significant operating pressures. Always consult the SKF datasheet for specific pressure and temperature limits.

Question?
What does 'double-acting' mean for a piston seal?

Answer: A double-acting piston seal is designed to seal pressure from both directions. This allows a hydraulic cylinder to extend and retract under power. The symmetrical design of the central NBR element ensures it provides an effective seal regardless of which side the pressure is applied to.

Last Update: Friday, March 13, 2026

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