Custom Non-Standard Duct Components

Much of what a plant actually needs is not in any catalogue. We build non-standard dampers, doors, compensators, pipe supports, wood-chip separators, air locks and flue duct components to customer drawings or to a site survey.

Send us the duct section, the design conditions and the interface dimensions, and we will return a general arrangement drawing for approval before any steel is cut.

What we actually build

Non-standard dampers and doors, duct compensators, isolation gates with unusual geometry, pulverizer outlet components, wood-chip separators, air locks, transition pieces and support steel. If it sits in a flue or air duct and it is not a catalogue item, it is the sort of thing we make.

Working from a survey

Where no reliable drawing exists, we work from a site survey. Send photographs with a tape measure across the duct in two directions, the flange bolt pattern, the available clearance around the position, and the lifting route. From those we produce a general arrangement drawing within a few days, and the client marks it up before any steel is cut.

Tolerances

Fabricated duct components are not precision instruments, but the interfaces are. Flange faces, bolt patterns and shaft centres are held to tight tolerance because they have to mate with something else. Everything else is held to a fabrication tolerance we state on the drawing, so the site knows what to expect.

Approval drawings

No steel is cut before the general arrangement drawing is approved. That is not bureaucracy: it is the cheapest point in the project to change a dimension. Changes after fabrication are charged, changes on the drawing are not.

Talk to us about this application

Send the duct section, design temperature and pressure difference, and the duty point. We will propose the gate type, the material selection and the actuation.

Request a quotation