Stuffing boxes serve as the primary dynamic seal for moving wireline. They compress injectable packing or elastomeric glands around the cable to contain well pressure. Manual or hydraulic actuation tightens the gland, energizing the seal. In slickline, solid packing rings form a tight fit; for e-line, grease injection enhances sealing by filling armor interstices. Stuffing boxes often... https://globalsealstech.com/product-category/oil-gas-seals/oil-free-lubricated-pump-seals/