API 618, now in its 5th edition, requires a cooling system for lubricated cases with non-metallic rings that have a maximum allowable working pressure (MAWP) above 500 psi (35 bar), lubricated cases with any ring material that have a MAWP above 1500 psi (103 bar), and all non-lubricated cases, regardless of pressure. Beyond the API requirement, cooled packing cases are proven to reduce rod temperatures as well as packing case temperatures – extending component life and improving sealing. Explore one highly effective cooling system solution celebrating 20 years on the market.
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