Flush systems circulate cooling water or other fluids through stuffing box jackets, removing frictional heat and preventing thermal damage to packing. External cooling becomes essential in high-pressure, high-speed applications where heat generation exceeds the packing's thermal dissipation capability, preventing thermal failure and maintaining acceptable operating temperatures. https://globalsealstech.com/product-category/oil-gas-seals/oil-free-lubricated-pump-seals/