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Aavolyn # 11-25103-012, Cast Iron TY251 Pressure Breaker Packing Ring
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The pressure breaker is used to stabilize the packing in the compressor. It is bored slightly over the rod diameter to allow a controlled leakage at the bore of the ring. This breaking down of the pressure in the first packing cup allows a slow buildup and drop off of pressure on each stroke.
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