Accu-Therm
Replacement Frame

The style sets how the carrying bar is supported and therefore how long the pack can grow. A C frame is cantilevered from the fixed head and suits small units in tight rooms, the F frame adds an intermediate support column, and the B frame carries the longest bar. Pick the style for the largest pack you expect to run, since changing style later means buying a new frame.

It is the frame's design working pressure, and the finished unit only reaches it if the plates and gaskets carry the same rating at your temperture. The working limit of the assembly is the lowest of the three. Give us the highest pressure each side can see, including pump shutoff head and relief valve settings, so the rating is checked against the real worst case and not the normal operating point.

The range is built to ASME Section VIII Division 1, and CRN registration is available where the unit is going to a Canadian province. Code documentation is tied to the place of installation and has to be prepared before the frame ships. Tell us the final site location at the time of order, because adding registration after delivery is slow and sometimes not possible at all.

Painted carbon steel is fine in a dry plant room, but daily washdown or a corrosive atmosphere chips the paint and rusts the steel beneath it. Stainless frames are offered for those rooms. The upgrade costs more at purchase and saves repainting and rust treatment over the working life of the unit.

Studded ports come standard, and lap-joint, weld-neck, ferrule and Victaulic connections can be specified on the same frame. When a new frame replaces an old one, matching the pipe ends already in place saves cutting and rewelding in the field. Send the connection type, size and orientation of the existing piping, and the frame will be quoted to meet it.

Often it does, sometimes before the carrying bar runs out. A long pack fed through a small port distributes flow unevenly, with channels near the inlet taking more than their share, and growth that brings more flow pushes port velocity and pressure drop up. When an expansion adds flow as well as surface, compare the port size with the future flow, not only the plate count with the bar.