Further information for Helios Apparatebau JVK 50/25 - Helios damper suitable NG500x250mm
JVK 5/25 damper frame housing with flange connection on both sides of galvanized sheet steel. Amount-ing to fit duct fans. Slats formed as hollow body. Stored in plastic axes, equal-ongoing, adjustable by external lever. Mechanism also backed out of the airstream and thus the malfunction by Verschnutzung. Make: Helios No.: 69
Type: JVK 5/25 ______________________________________