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Berita Perusahaan Tentang How to choose right seal kit
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How to choose right seal kit

2025-10-31
Latest company news about How to choose right seal kit

How to choose right seal kit

 

To choose the right seals, follow these 5 core steps:

1. Match the fluid/compound compatibility
First, identify the media the seal will contact (e.g., oil, water, chemicals, or gases). For example, NBR seals work well with mineral oils but fail in strong acids, while Viton seals resist harsh chemicals and high temperatures. Avoid mismatches—using a standard NBR seal in gasoline, for instance, will cause rapid swelling and leakage.

2. Consider temperature and pressure ranges
Check the operating temperature (e.g., -20°C to 120°C for general NBR; -269°C to 204°C for PTFE) and pressure (e.g., up to 10 MPa for O-rings, higher for metal-reinforced seals). Exceeding these limits leads to seal hardening, cracking, or deformation.

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3. Select the right size and profile
Measure the groove dimensions (inner diameter, outer diameter, cross-section) or shaft/housing tolerances. Use standard sizes (e.g., AS568 for O-rings) when possible; custom sizes are needed for non-standard equipment. Ensure a proper compression rate (usually 15-30% for O-rings) to balance sealing performance and service life.

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4. Evaluate environmental conditions
Account for external factors: dust, abrasion, or dynamic motion (e.g., rotating vs. static applications). For dusty environments, add a wiper seal; for high-speed rotation, choose low-friction materials like PTFE with carbon filled.

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