
JL multileaf damper
The JL multileaf dampers are used as airtight throttle and shut-off dampers in ventilation and air conditioning systems with minimal leakage. Their hollow body blades are coupled in opposite directions via an external linkage. The JL multileaf damper can also be supplied in very large sizes for your ventilation system. They are operated by a control lever or by adjusting an electric drive.
Technical details
- Throttle and shut-off dampers for air volume flows in ventilation systems
- Air-tight multileaf damper according to DIN 1946-4
- Hollow body blades with flow-optimized profile, sealed and coupled in opposite directions
- Particularly suitable for installation in hospitals
- Actuation: manual with control lever, electric actuator
- Hygiene certificate available
Declarations & proofs

Product details
The JL multileaf dampers are used as throttle and shut-off dampers in ventilation and air conditioning systems with minimal leakage. They are equipped with a 180 mm long frame with chamfered connection flanges.
Leak tightness classes JL multileaf damper
The multileaf damper has a leakage class 4 for the damper blade in accordance with DIN EN 1751 at 100 [Pa] static pressure difference. Its casing has leakage class C in accordance with this standard.
Hollow body blades, coupling linkage
The hollow body blades of the JL multileaf damper are sealed and coupled in opposite directions by an external linkage. The blades are mounted in special brass bushings.
Actuating lever, actuators
Actuation is possible with an actuating lever or, alternatively, by means of an electric actuator, either reversible or spring-return.
Dimensions JL multileaf damper
The product is characterized by the fact that it can be adapted to the requirements of your ventilation system and also supplied in very large sizes. JL multileaf dampers are available in sizes (W x H) from 200 mm x 180 mm to 2,000 mm x 1,995 mm.
Product markings
The JL multileaf damper is marked with a hygiene certificate from an independent external testing institute.
Option
Factory combination of JL multileaf damper with weather resistant louvres W, AW and AWE
Technical specifications
Not all of the variant values listed here can be combined with each other. Use our Wildeboer configurator to easily check the available options.
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