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Germany, Austria, Switzerland


(sealed on 4 sides)

Safety and reliability down to the smallest possible detail: Passavant® penstocks are 4-sided sealed shut-off devices suitable for both flow directions and are available from 200x200 mm up to 7000x7000 mm and 5 bar (50 m wc).

Unique Features

  • Maximum safety through static and stress calculation by means of Finite Element-Method
  • Optimized steel-welded construction, largely maintenance-free
  • Avoidance of crevice corrosion through constructive prevention and through-welded seams
  • High loading capacity even with hard and bulky contents in the waste water
  • Our spindles are rolled, not cut


Made of various types of stainless steel that gain durability through pickling and passivation, the Passavant® Penstock regulates the water flow reliably with a tightness according to class 4 (5) DIN 19569 (Table 1).
It is equipped with a four-sided seal in both flow directions, fitted with double lips or double bulb seals.

The steel-welded edge construction with underfloor and overfloor operation allows all types of drive – from manual to hydraulic. The use of a mother box compensates for misalignments and guarantees smooth running. The penstock is available as a single- or double-spindle version or as a drop-down penstock; in addition, there is a choice between a semi-circular or straight sill.

The slide frame can either be doweled to a straight wall or concreted into building recesses. The prerequisite for dowelling is a level and straight shaft wall according to DIN18202. The penstock is designed and manufactured in our factory according to DIN 19569-4.

Passavant® Cable-Operated Bar Screen COB & Passavant® Shut-Off Devices