Lot of 15 Micarta Piston Rings 269-312232-999

Lot of 15 Micarta Piston Rings 269-312232-999 – 3-1/2″ Bore Industrial Compressor Rings

The lot comprises 15 commercial quality Micarta (phenolic resin bonded fabric laminate) piston rings for use in 3-1/2 inch (3.500in) bore industrial and marine reciprocating compressors. These rings are constructed for best performance in low lubrication (lean-lube) or no lubrication (non-lube) cylinder conditions and avoid metal-to-metal contact between the piston and the cylinder liner. The canvas-base laminate matrix yields low coefficients of friction, good structural elasticity and excellent wear resistance in heavy riding applications, preventing crucial bore surfaces from scoring and premature failure.

Model Details

• Model Number: 269-312232-999
• Manufacturer Part Number (MPN): 269312232999
• Type: 3-1/2″ Micarta Piston Compression Ring
• Quantity in Lot: 15 Rings

Technical Specifications: Piston Rings 269-312232-999

Key Features

• Premium Micarta Phenolic Matrix: Constructed from industrial-grade linen/canvas phenolic laminate providing high compressive strength and low thermal degradation.
• Non-Lube Compatible: Engineered for oil-free or lean-lubrication compression systems to eliminate process gas contamination.
• Precise 3-1/2″ Bore Sizing: Exact dimensional tolerance matching for standardized 3.500-inch nominal cylinder diameters.
• Reduced Cylinder Wall Wear: Soft yet resilient structural material prevents scuffing, extending the operational lifespan of the compressor liners.
• Step-Cut / Angle-Cut Joint Design: Optimized end-joint clearance configurations to ensure positive sealing and control blow-by under high thermal load.

Applications

• Industrial reciprocating air and gas compressors.
• Marine low-pressure and high-pressure start-air compressors.
• Chemical process compressors requiring zero oil-carryover or non-lubricated operation.
• Refinery gas processing systems handling dry gases.
• Onsite maintenance, repair, and full overhaul (MRO) operations for legacy multi-stage compression systems.

Equipment Compatibility

These piston rings are cross-compatible with various process gas and air compressors utilizing a standard 3-1/2 inch bore cylinder configuration, including select legacy models from Ingersoll Rand, Gardner Denver, Joy, and Chicago Pneumatic.

Part Number Cross-References

• MPN: 269-312232-999
• Alt Part Code: 269312232999
• Industry Standard Code: Ring Piston 3-1/2″ Micarta

Marine Engineer Expert’s Guide

Marine Engineer Inspection Note: When retrofitting or replacing compressor piston rings in a non-lube system, cleanliness is paramount. Micarta rings are highly forgiving on cylinder walls compared to cast iron, but they are vulnerable to embedded abrasive particulate matter. Always degrease and wipe down the cylinder liner thoroughly before installation.

Tip – Measuring End Gap: Never assume out-of-the-box fitment. Drop the ring individually into the cleanest, least-worn part of the cylinder bore (use the piston head to push it down squarely). Use a feeler gauge to measure the ring end gap. If the gap is tighter than the compressor manufacturer’s minimum thermal expansion specification, dress the tips carefully with a fine file to prevent butt-ending and ring breakage during operation.