AT200 R


Knife gate valve with special regulating disc to achieve a linear control characteristic, for installation between flanges as per DIN EN 1092-1 and useable as end-valve, with self adjusting COMPACT-Cross-seal towards the atmosphere, hermetically sealed in both flow-directions, two-piece body, metallic and jitter-free guided knife plate with segment-formed radius, cutting edge on the lower body surface.
DN 50-DN 1200    



  • Pressure testing:

DIN 3230, T3 - BA / BO 1, DIN 3230, T3

  • Inspection:

Germanischer Lloyd, Lloyds Veritas

Product advantages

Absolutely maintenance free
the COMPACT-Cross sealing as double sealing ring profile secures the sealing of the knife gate towards outside and can be post-sealed - without operation interruption
Excellent sealing
the knife gate closes pressure-tight in both flow directions, the seat sealing is chambered and built-in, slightly pre-tensioned. The metallic and jitter-free guided knife gate is resistant against pressure impacts through lock closing condition
Universally operational
the DOMINO-knife gate is suitable to regulate highly liquid, thick fluid and gasesous media, as well as all transportable solid materials, especially for air.
Secure separation
the cutting edge on the lower body surface largely prevents jamming of material rests in the sealing area. The segment-formed radius of the knife gate prevents a clamping effect.
guaranteed through the high finish of the lateral running and seal surface. Easily moveable even after long standstill intervals
Optimal jitter free bearing
of the knife gate in both flow directions and restrictor positions, made possible throuh the lateral plate guidance Variable drive selection
Handwheel, square, reduction gearbox, pneumatic cylinder, hydraulic cylinder, electro actuator

Application range

Applications & Industries

  • Oxygenation of sludge tanks in sewage plants
  • Waste water treatment plant
  • Paper and pulp industry
  • Chemical plants
  • Pumping stations, Storage basin

Technical data

Knife gate valve for installation between flanges acc. to DIN EN 1092-1
Nominal width
DN 50 – DN 1200
DN 50 – DN 150 : PN 10/16
from DN 200 : PN 10
Two-piece body
Two seperate halfs of the body
Front-body with regulating disc
Rear-body with disc-bed
Temperature range
-30 °C - +200 °C
depending on the seal material
Face-to-face dimension:
EN 558 - 1 line 20
DIN 3202 - K1


Material: Code:
GG 25/EKB-coated 22
GGG 40/EKB-coated 23
Material: Code:
Stainless steel 1.4301 63
Stainless steel 1.4571 66
Spindle/Piston rod:
Material: Code:
Stainless steel 1.4021 63
Stainless steel 1.4571 66
Material: Code:
Ceramic fibre K