Founded in 1975 and owner-managed from Hünfelden in Hessen, Strulik manufactures rectangular and circular fire dampers, fire-rated disc valves, make-up air closures, shut-off devices, smoke control dampers and ducts, and differential-pressure systems for safety stairwells. Its fire dampers are CE-marked to EN 15650 and its multi-louvre and calcium-silicate smoke control dampers to EN 12101-8, with DIBt approvals including Z-56.4212-1001 for the damper family and Z-19.18-2212 for the BEK-EI90S overflow closure. Around eighty per cent of the differential-pressure components are made in-house and developed on the company’s own test rig.