JL 254 • Air tight multi-leaf dampers

Air tight multi-leaf dampers in galvanized steel classified DIN EN 1751-4.

• For airstream regulation in ventilation and airconditioning systems

• Galvanized steel blades, frame, and round axle
• Air tight EPDM sealings between the blades and the gears
• Aluminium gears
• Airtight polyamid bearings max for temperature ranges upto 80°C

• Galvanized steel

• Galvanized steel aerodynamic designed regulation blades of 100 mm width containing aluminium gears for simultanious counter-rotating operation of the damper
• Air tight sealings between the blades and the gears classified DIN EN 1751-4
• Galvanized steel axle of Ø 12 mm and length 100 mm, wich extends 67 mm outside the damperflanges. Axle with borehole at its end to easily mount axle extension LOA 100 M or LOA 150 M (upon request), when a longer axle is required.
• Galvanized steel housing with depth of 110 mm and flange of 30mm, made out of 2 vertical panels with air-tight polyamid bearings and 2 horizontal panels, all welded together
• All dampers are made to measure. To obtain the exact height of the damper when in-between sizes are ordered, the upper and lower frame will be bended towards or away from the middle of the damper(see drawing), to make a execellent fit with as much as possible standard fitted blades. Due to this fact the free area of the damper can become less than the opening of the LXH dimension.

• To be mounted between rectangular ducts with flanges of 30 mm
• To be surface mounted on wall, floor or ceiling

• Manual control handle with fixing system type MCS-250/254
• Mounted axle extensions type LOA 100 M, LOA 150 M
• Extra axle available upon request
• Square axle end of 9 x 9 mm type SQE
• Actuators BELIMO
• Alternative bearings:
  • PTFE bearings for low and high temperature applications type TBS (from -50°C to 200°C) and pressures till 2000Pa
  • Brass bearings for high temperature applications type MBS (up to 250°C)
  • Ball bearings for high pressure applications type BBS (up to 80°C and 2500Pa)
• Air tight silicone sealings (for high temperature applications upto 250°C) +10%
• Horizontal mounted coupling system type HVM
• Alternative outer-mechanism (for high temperature applications) (Dimension D=140 mm instead of 110 mm)
  • Counter-rotating blades (+20%)
  • Parallel moving blades (+20%)
• Reinforced frames (+5%)
• Multi-leaf damper with vertical blades (+15%)
• Alternative construction materials
  • Aluminium (x2.25)
  • Stainless steel (INOX304) (x3.75), (D=140 with outer linkage, L max=1300 mm)
  • Stainless steel (INOX316) (x4.3), (D=140 with outer linkage, L max=1300 mm)
  • Aluminium blades with galvanized steel frame (x1.75)
• Version ATEX available upon request

• The multi-leaf volume control dampers shall be of the air tight type classified DIN EN 1751-4 in galvanized steel with counter-rotating blades, aluminium gears, round axle and polyamid bearings.
• CAIROX type JL 254

• JL 254, 600, 400, C30 + MCS-250/254

Explanation

JL 254 = Type of air-tight multi-leaf damper

600 = Length

400 = Height

C30 = connection flange

Accessories (Optional)

MCS-250/254 = Manual control with fixing system