A2-36 FK40 Bus AC Compressor Oil & Gas Piston Ring Set (Φ50/55/60/65mm)

High-quality A2-36 oil & gas piston ring set designed for FK40 series heavy-duty bus air conditioner compressors, available in Φ50, Φ55, Φ60 and Φ65mm specifications. Made of premium wear-resistant alloy material with precise heat treatment, delivers excellent sealing performance and long service life, essential for professional compressor overhaul and performance restoration.

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A2-36 (For FK40 Compressor, Φ50/55/60/65mm)

Product Description

The A2-36 is a professional oil & gas piston ring set engineered for FK40 series heavy-duty bus air conditioner compressors, available in four bore specifications: Φ50mm, Φ55mm, Φ60mm and Φ65mm. Installed on the compressor piston, the gas ring ensures air-tight sealing of the compression chamber to maintain refrigerant compression efficiency, while the oil ring controls lubricating oil distribution and prevents oil from entering the refrigeration circuit.

Manufactured from high-grade wear-resistant alloy material and processed through precision machining, professional heat treatment and strict dimensional calibration, this piston ring set features excellent elasticity, high temperature resistance and refrigerant corrosion resistance. It maintains stable tight sealing performance under long-term high-speed reciprocating motion and high-pressure working conditions, effectively reduces refrigerant leakage, restores compressor cooling capacity and significantly extends the service life of the overhauled compressor.

With dimensions fully matching the original FK40 compressor specifications across all bore sizes, it supports direct in-situ replacement without modification, greatly simplifying overhaul workflow and shortening maintenance downtime. It is an essential sealing component for professional bus AC compressor overhaul and rebuild services.

Backed by 39 years of professional expertise in the bus HVAC industry, TCHAIN supplies 100% quality-inspected compressor piston ring parts that are fully compatible with most 6-14m diesel buses, school buses, shuttle buses and long-distance coaches equipped with FK40 series compressors. We provide competitive wholesale pricing, comprehensive technical support and fast global delivery to minimize your fleet maintenance downtime.