What are the Key Performance Parameters of Mechanical Seals?

The key performance parameters of mechanical seals directly determine their adaptability and reliability in specific applications, with the following core indicators:

1. Operating Temperature Range

Reflects the seal's tolerance to fluid temperature, typically ranging from -200°C (for cryogenic media like liquid nitrogen) to 500°C+ (for high-temperature fluids like steam). Exceeding the range will cause elastomer aging, seal face deformation, or even failure.

2. Maximum Operating Pressure

The maximum pressure the seal can withstand under rated conditions, ranging from vacuum (for low-pressure systems) to 40MPa+ (for high-pressure pumps/compressors). Pressure affects seal face contact force; insufficient or excessive force leads to leakage or accelerated wear.

3. Speed Limit

The maximum rotational speed compatible with the seal, related to shaft diameter and seal structure. It ranges from low-speed (<300rpm for static equipment) to high-speed (>3000rpm for centrifugal compressors). Excessive speed causes heat accumulation and seal face damage.

4. Leakage Rate

The amount of fluid leaking through the seal interface, a critical indicator of sealing performance. For liquids, it’s usually <5ml/h; for dry gas seals, it’s nearly zero leakage. Exceeding the rate indicates seal failure or improper selection.

5. Wear Resistance

Determined by seal face material combinations (e.g., silicon carbide-carbon graphite) and structural design. It’s evaluated by service life under rated conditions, typically 8000–20000 operating hours for industrial applications.

6. Chemical Compatibility

Refers to the resistance of seal materials (seal faces, elastomers, metals) to the medium. Incompatibility causes material corrosion, swelling, or cracking, directly affecting seal life.

I can help you analyze the performance parameter matching degree of a specific mechanical seal model with your application conditions (e.g., comparing temperature/pressure limits with your actual operating data). Do you need this targeted analysis service?