Zero-leakage wireline pack-off systems achieve ISO 14310 V0 rating with redundant sealing elements. Used in critical HP/HT and subsea interventions, this configuration ensures bubble-tight sealing even after thousands of cable cycles and extreme temperature swings from surface to bottom-hole conditions https://globalsealstech.com/product-category/oil-gas-seals/oil-free-lubricated-pump-seals/