Sullair X-Ring / Sealing Ring Replacement – 88290012-468

The Sullair 88290012-468 is identified as an X-ring rubber sealing component used in Sullair air-compressor applications. A compressor-parts catalog lists the Sullair reference 88290012-468 as an X-Ring Rubber, while procurement documentation identifies it as an 8-shaped sealing ring for the compressor inlet valve.

Working Process

The 88290012-468 X-ring provides a flexible sealing barrier within the compressor’s inlet-valve assembly. Its primary purpose is to prevent unwanted leakage of air or control pressure between mating components.

During compressor operation, the inlet valve moves according to the compressor’s loading and unloading requirements. The X-ring remains seated in its sealing groove while accommodating the movement and pressure changes of the valve assembly.

A properly functioning seal helps maintain the required pneumatic pressure around the inlet valve and prevents air from escaping through the valve interface. This supports accurate operation of the compressor’s inlet-control system.

The part is reported as an 8-shaped/X-shaped sealing ring, and trade data identifies it as a heat-resistant, highly elastic rubber component used for compressor applications. One listing gives a size of approximately 6 × 130 mm.

Application

The 88290012-468 is associated with Sullair compressor inlet-valve maintenance. It is also sold as part of an inlet-valve repair/maintenance kit for Sullair screw compressors.

Some aftermarket catalogs also refer to the same part number as an MPV kit, so the exact application should be verified against the compressor model and parts diagram before ordering.

Key Benefits

• Provides reliable sealing within the compressor valve assembly.
• Helps prevent air and control-pressure leakage.
• Supports proper inlet-valve operation.
• Helps maintain efficient compressor loading and unloading.
• Resists pressure and temperature conditions encountered in compressor service.
• Helps restore sealing performance during valve maintenance.
• Suitable for scheduled Sullair compressor maintenance.
• Helps reduce leakage-related compressor performance problems.

Maintenance Importance

The X-ring should be inspected for cracking, hardening, flattening, cuts, deformation and loss of elasticity during valve servicing. A damaged seal can cause leakage and may affect inlet-valve operation.

Replacing the worn 88290012-468 with the correct sealing component helps restore the valve’s sealing performance. The sealing groove and mating surfaces should also be clean and free from damage before installation.

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