Double Shut-off damper

Even though EnergieLink shut-off damper can achieve a tightness of 99.9% by selecting a suitable seal, there will always be a system immanent residual leakage. For applications requiring a sealing of 100%, double shut-off dampers are the solution.

Double shut-off dampers consist of two dampers in one housing, forming an enclosed compartment in closed position. Air or another sealing gas is fed into this compartment via a fitting at a slight overpressure, relative to the main flow. This leads to 100% tightness of the entire unit.

According to the project specific requirements, the two individual shut-off vanes can be actuated by one common shaft or by separate shafts. The control of the sealing flow is coupled with the actuation of the damper to ensure a reliable seal with minimum consumption of compressed air or sealing gas.