Duff Norton Co., Charlotte, reports its HPMC Series MultiPort Rotary Unions designed to provide a
rotating seal between fluids and a revolving roll or drum are suitable for applications requiring
high pressures and multiple media including water, hot oil, steam, air and chemicals. Standard
models feature nickel-plated steel construction and up to eight individually sealed ports. Special
configurations are available upon request. Once the slotted rotating disk is clamped into position,
the body of the device remains in place regardless of rotation, according to the company.