MPV046 90R75 Hydraulic Pump Spare Parts

MPV046 90R75 Hydraulic Pump Spare Parts

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 3 year year

Product details

MPV046 90R/75 Hydraulic Pump Spare Parts - Oil Seals

I. Types and Characteristics of Oil Seals

1. Lip-Type Seals

• Structure: Rely on the lip to tightly contact the sealing surface, generating contact stress through elastic deformation. The sealing effect automatically enhances as oil pressure increases.

• Applications: Hydraulic cylinders under high pressure, variable pressure, and rapid motion (e.g., YX-type seals).

• Advantages: Low friction resistance, excellent pressure resistance, stable operation, and long service life.

2. Composite Seals

• Structure: Combine rubber (e.g., O-rings) with polytetrafluoroethylene (PTFE) layers (e.g., Glyd Ring, Step Seal).

• Sealing Mechanism: Rubber provides initial contact stress, while the PTFE layer enhances sealing under high pressure.

• Advantages: Significantly improved pressure resistance, suitable for high-pressure environments.

3. Self-Sealing Compression-Type Seals

• Structure: Generate initial contact stress through radial compression (e.g., O-rings).

• Limitations: Require backup rings under high pressure to prevent material extrusion into sealing gaps.

II. Compatibility of MPV046 90R/75 Hydraulic Pump Oil Seals

1. Model Matching

• MPV046 hydraulic pumps typically useO-rings, YX-type seals, Glyd Rings, etc. Selection depends on the pump’s seal groove dimensions.

• For 90R/75 models (potentially high-pressure applications), prioritizecomposite seals(e.g., Step Seals) or self-sealing types with backup rings.

2. Material Requirements

• Oil Resistance: Must be compatible with hydraulic fluids to avoid swelling, dissolution, or embrittlement.

• Temperature Resistance: Typically suitable for -50°C to 260°C.

• Pressure Resistance: Up to 700 kg/cm² (10,000 psi), meeting high-pressure pump demands.

IV. Selection and Installation Guidelines

1. Key Selection Criteria

• Operating Conditions: Prioritize composite seals for high-pressure environments; self-sealing types for low-pressure applications.

• Dimensional Accuracy: Seal groove dimensions must strictly match the oil seal’s outer diameter and lip diameter.

• Material Compatibility: Confirm compatibility with hydraulic fluid types (e.g., mineral oil, synthetic oil).

2. Installation Precautions

• Cleanliness: Thoroughly clean the seal groove and oil seal before installation to prevent leaks caused by contaminants.

• Lubrication: Apply dedicated grease to the seal lip to reduce friction.

• Orientation: Ensure the lip faces the side requiring sealing to avoid reverse installation.

V. Common Issues and Solutions

1. Leakage Problems

• Causes: Aged seals, improper installation, or excessive pressure.

• Solutions: Replace the oil seal, verify seal groove dimensions, and adjust system pressure.

2. Rapid Wear

• Causes: Abrasive materials or harsh operating conditions.

• Solutions: Use wear-resistant materials (e.g., PTFE composites) and improve hydraulic system cleanliness.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

 Audited supplier

3 year

Address: Ningbo, China

Main Product: hydraulic motor, gear box, hydraulic pump , hydraulic valve , hydraulic winch, hydraulic system

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