• EN
  • 2.1.1. Gastight Circular Damper GD-C

    The gastight circular shut-off damper GD-C in solid and maintenancefree design, is used for systems with high tightness requirements.


    Dimensions DN 150, DN 200, DN 250, DN 360, DN 400
    Actuator electrical, pneumatic, manual, or emergency actuating by means of Hand wheel
    Admissible design temperature up to +100 °C
    Admissible operating pressure 10 000 Pa
    Adm. leakage rate damper blade incl. seat of damper clade acc. DIN 25 496 < 10 l/(h ⋅ m²) at 1 bar, 20 °C and Δp = 2 000 Pa
    Adm. leakage rate housing incl. shaft transition acc. DIN 25 496  < 10 l/(h ⋅ m²) at 1 bar, 20 °C and Δp = 2 000 Pa
    Robust damper housing

    Circular damper blade

    Gas-tight shaft transition through housing

    stainless steel, material 1.4301 (AISI/SAE 304), in gastight design
    stainless steel, material 1.4301 (AISI/SAE 304)
    shaft sealing made of viton


    • The actual leakage rates for housings and seat of damper blade are much lower than specified in the requirement according to DIN 25 496
    • The damper is designed to operate without any failure at an operating pressure of 1.1- times of the admissible operating pressure of the damper
    • The tightness of seat of damper blade is testable in built-in situation
    • For maintenance purposes, e. g. lubricating, if required, there is no dismantling of the damper from the duct system necessary
    • All media touched parts are welded continuously and without gaps to ensure an easy decontamination

    Service & Downloads

    Your contact person

    Marco Sauder

    Deputy Head of Filter and Damper Systems

    T +49 241 441 285

    M +49 173 520 1543