Leather Hydraulic Piston Seal

Product Specifications

Technical details and manufacturing context for Leather Hydraulic Piston Seal

Definition

This precision-engineered leather seal is designed specifically for hydraulic piston applications. It creates a reliable barrier between high-pressure hydraulic fluid and the piston chamber, preventing leaks and maintaining system pressure. The seal is manufactured from specially treated leather that resists hydraulic fluids while maintaining flexibility under compression. It is used in industrial machinery where traditional synthetic seals may not be suitable due to temperature or chemical compatibility requirements.

The seal is available in a range of sizes to fit various piston and cylinder configurations. The inner diameter ranges from 10 to 500 mm, the outer diameter from 20 to 520 mm, and the thickness from 3 to 12 mm. The working pressure rating is 1.0 to 1.6 MPa, with an operating temperature range of -40 to 85 °C. The material hardness is 70 to 90 Shore A, tensile strength is 15 to 25 MPa, and elongation at break is 10 to 20%. Oil resistance is low, with a volume change of ≤5% in hydraulic oils, and water absorption is ≤3%. The friction coefficient is 0.1 to 0.2, and weight varies from 0.05 to 2.5 kg depending on size.

These values are reference ranges and must be verified for the specific model and application. Standards such as ISO 7619-1, ISO 37, ISO 1817, ISO 62, and ASTM D1894 are listed as procurement references, not as proof of certification or compliance. Always confirm model-specific values and standards with the legal manufacturer or supplier before use.

Working Principle

The seal works by compressing against the piston and cylinder wall to create a fluid-tight barrier. The leather fibers swell slightly in hydraulic fluid, enhancing the sealing effectiveness. This swelling action helps to fill microscopic irregularities on the mating surfaces, providing a more secure seal under pressure. The material's flexibility allows it to conform to slight variations in the cylinder bore, while its resistance to hydraulic fluids ensures long-term durability. The seal's design ensures that it maintains contact with both surfaces even under dynamic conditions, preventing fluid bypass and maintaining system pressure.

Common Materials

Chrome-tanned bovine leather, Hydraulic fluid-resistant impregnation compound

Technical Parameters

Parameter	Typical range	Notes & selection driver
Inner DiameterRequired	10–500 mm	Seal inner diameter for piston fit
Outer DiameterRequired	20–520 mm	Seal outer diameter for cylinder fit
ThicknessRequired	3–12 mm	Cross-sectional thickness of seal
Working PressureRequired	1.0–1.6 MPa	Maximum hydraulic pressure ratingISO 5208
Temperature RangeRequired	-40–85 °C	Operating temperature limits
Hardness	70–90 Shore A	Material hardness measurementISO 7619-1
Tensile Strength	15–25 MPa	Ensures durability under stressISO 37
Elongation at Break	10–20 %	Indicates flexibilityISO 37
Oil Resistance	≤5 % volume change	Low swelling in hydraulic oilsISO 1817
Water Absorption	≤3 %	Low absorption prevents dimensional changeISO 62
Friction Coefficient	0.1–0.2	Low friction reduces wear and heatASTM D1894
Weight	0.05–2.5 kg	Varies with size

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Leather Seal Body Part
Primary sealing element that contacts piston and cylinder

Material: Chrome-tanned bovine leather
Impregnation Layer Part
Chemical treatment for fluid resistance and durability

Material: Synthetic polymer compound
Reinforcement Edge Optional Part
Strengthened edge for improved wear resistance

Material: Densified leather fibers

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Leather Hydraulic Piston Seal.

Manufacturers of Leather Hydraulic Piston Seal

Manufacturer profiles associated with Leather Hydraulic Piston Seal.

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Frequently Asked Questions

What are the typical applications for this leather hydraulic piston seal?

This seal is used in industrial hydraulic systems where synthetic seals may not be suitable due to temperature extremes or chemical compatibility. It is commonly found in presses, injection molding machines, and other heavy machinery.

How do I select the correct size for my application?

You need to know the piston diameter (inner diameter), cylinder bore (outer diameter), and the groove depth (thickness). Refer to the manufacturer's guidelines and verify the dimensions against the seal's specifications.

What maintenance is required for this seal?

Regularly inspect for wear, cracking, or deformation. Check for leaks and ensure the seal is properly lubricated. Replace if any damage is detected. Follow the manufacturer's maintenance schedule.

Can this seal be used with all hydraulic fluids?

The seal is designed to resist hydraulic fluids, but compatibility should be verified with the manufacturer. Oil resistance is rated at ≤5% volume change in hydraulic oils, but specific fluids may vary.

Data Basis

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Preliminary Technical Classification

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pressure:	Up to 40 MPa (400 bar) dynamic, 60 MPa (600 bar) static
other spec:	Surface speed ≤ 0.5 m/s, compatible with standard hydraulic fluids (mineral oil, HFA, HFB, HFC), not recommended for abrasive slurries >5% concentration
temperature:	-40°C to +120°C (continuous), up to +150°C (intermittent)

Product Specifications

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