The specially designed kinematical mechanism secures the damper blade at the end positions “open” and “close” by means of special toggle levers in case of a failure of energy support. Two concentric sealing rings fixed to the damper seat create high tightness as well as a test groove in the gap between the two sealing rings. In order to test …

The shut-off damper consists of a damper housing, a hinged damper blade with the damper shaft as its bearings, and an actuating cylinder moving the damper blade by an actuating equipment. A sealing profile made of silicone rubber is fastened to the damper blade by a leading bar. Upon closure of the damper, this sealing profile is pressed against the …

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. …

The robust damper housing made from optional stainless or galvanized steel can contain up to seven lamellae. Non return dampers with more than one lamella additionally have crossbars made from U-profile, welded to the damper housing. These cross-bars are serving as fixing for the lamellae and as supporting surface for the sealing. The lamellae are made …

Pressure relief damper, type KL-E with control function The Pressure Relief Damper Type KL-E is a design variant provided with control function which, as soon as then opening pressure is exceeded, keeps nearly constant the pressure in the ductwork, independent of the range of volume flow. When the pressure in the ductwork reduces to its normal range …