Dryer head bolts, manhole studs, journal bolts, bearing housing bolts, steam joint and header studs, loading arm pins, frame and anchor bolts, made in Houston to your drawings and specifications.
A representative section of a 150 in. trim paper machine: one press nip, with its two rolls in their bearing housings and the top roll on loading arms, and a two-tier group of five 6 ft (1.83 m) steam-heated dryer cylinders on tending-side and drive-side frames. It comes apart as at a shutdown. The hood section lifts; on the drive side the siphons and rotary steam joints are unbolted and drawn off the journals, the header flanges are parted and the gear case cover comes away. The doctors are unbolted from their holders, the bearing caps are opened and set down, and the dryers and the top press roll are lifted out. Then the manhole covers come off, the head bolts are run out and the heads are drawn off the shells, the journals are unbolted from the heads, the press loading arms are unpinned, and the frames are parted at their splices down to the sole plates and anchor bolts. The bolting and pins we make are in colour. Press Solid view for a steel model, or Cutaway to see one dryer in section: the shell wall, both heads, the hollow journals and the siphon inside.
A full ring of cap screws at each end of every dryer, through the cast head into the end of the shell: thirty-six per head shown. They hold the head on against the steam pressure.
Round the manhole cover in each dryer head, taken off to get inside the dryer for inspection or siphon work.
Bolt the flange of each journal to the centre of the head, carrying the dryer's weight into the bearings.
Cap bolts closing each split housing over its spherical roller bearing, and base bolts holding the housing to the frame.
Bolt the rotary steam joint to the drive-side journal, and the condensate head with its stationary siphon to the joint.
Studs with two heavy hex nuts at the flanged joints in the steam and condensate headers: eight 3/4 in. × 4 in. studs on a 9-1/2 in. bolt circle at NPS 6, eight 5/8 in. × 3-1/2 in. studs on a 7-1/2 in. bolt circle at NPS 4 (ASME B16.5 Class 150).
Cap and base bolts on the four press roll bearing housings, on the press frame and on the loading arms.
The pivot pins the loading arms swing on, the loading cylinder clevis pins, and the pivot bracket bolts.
Bolt each doctor's end holders to the machine frame.
Through the flanges of the drive shaft couplings on the press rolls and the dryer in-drive.
Join the frame sections: columns to base frames, press frame to dryer frame, and the cross ties between the tending and drive sides.
Anchor bolts cast into the foundation hold the grouted sole plates down; hold-down bolts fix the frames to them. Anchor rods are typically ASTM F1554.
Paper machine bolting to your drawing, from the dryer head bolts to the anchor bolts. Send us your drawings and material spec.
Request a quote832-446-3442A representative section of a generic machine, not any maker's or mill's design, and far shorter than a real dryer section. Only the header flanges and their studs follow a published standard (ASME B16.5 Class 150). The dryers, heads, journals, bearing housings, steam joints, press, doctors, gearing, frames and hood are illustrative typical proportions, and every other bolt count and size is typical. Felts, the sheet, most of the gear train, piping to the steam joints and the rest of the hood are left out. Dryer bolting is pressure-vessel bolting and must be made to the dryer drawing and the governing code. Your drawings govern. We manufacture to your drawings and specifications.
Drawn as a typical machine section. The steam and condensate header flanges and their studs are to ASME B16.5 Class 150; dryers are pressure vessels to the ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, inspected to TAPPI TIP 0402-16; bolting is typically to ASTM A193 / A194, SAE J429 and ASTM F1554 (anchor rods).
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