Function & Design
Axial compression, radial sealing
A stuffing box consists of a gland follower and a stuffing box packing. The stuffing box packing is the actual seal; it is axially compressed via the gland follower by means of screws or springs. This axial compression expands the packing, producing a radial pressure on the shaft. The sealing gap is adjusted by the pressure of the gland follower.
Large contact areas and high compressive forces are required for sealing, which results in high friction. One advantage is that the seal can be adjusted to compensate for ongoing wear by re-tightening the gland follower, thereby reducing leakage.
Adjustable during operation
Suitable above 200 °C
