Application Application Multileaf dampers of Type JZ-AL are used as an acting element in the volume flow and pressure control in air conditioning systems For shutting off ducts and openings in walls and ceiling slabs Opposed action blades are due to their characteristics preferably used for variable operation Powder-coated construction with increased corrosion resistance Special characteristics Aerofoil blades Low-maintenance, robust construction No parts with silicone Nominal sizes B: 200 – 1200 mm, in increments of 1 mm H: 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000 mm Any combination of B × H Description Parts and characteristics Ready-to-install shut-off damper Blades with gears Drive arm with drive shaft and bearing plate Attachments Quadrant stays and limit switches: Quadrant stays to adjust the damper blades (stepless adjustment) and for capturing the end positions Open/Close actuators: Actuators for opening and closing multileaf dampers Modulating actuators: Actuators for stepless blade adjustment Pneumatic actuators: Pneumatic actuators for opening and closing multileaf dampers Accessories MULTILEAF DAMPER, VARIANT JZ-AL Multileaf damper with actuator BLADE MECHANISM WITH GEARS JZ-AL MULTILEAF DAMPERS MADE OF ALUMINIUM FOR SHUTTING OFF THE AIRFLOW IN AIR CONDITIONING SYSTEMS Rectangular multileaf dampers for volume flow and pressure control as well as for shutting off ducts and openings in walls and ceiling slabs Maximum dimensions 1200 × 1000 mm Casing air leakage to EN 1751, class C Aerofoil opposed action blades Blades interconnected by gears Optional equipment and accessories Actuators: Open/Close actuators, modulating actuators Powder-coated construction Anodised construction HOMEPAGE > Products > External Louvres & Dampers > Multileaf dampers > Multileaf dampers > JZ-AL
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JZ-AL - Trox€¦ · Multileaf dampers of Type JZ-AL are used as an acting element in the volume flow and pressure control in air conditioning systems For shutting off ducts and openings
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Application
Application
Multileaf dampers of Type JZ-AL are used as an acting element in the volume flow and pressure control in air conditioning systemsFor shutting off ducts and openings in walls and ceiling slabsOpposed action blades are due to their characteristics preferably used for variable operationPowder-coated construction with increased corrosion resistance
Special characteristics
Aerofoil bladesLow-maintenance, robust constructionNo parts with silicone
Nominal sizes
B: 200 – 1200 mm, in increments of 1 mmH: 100, 150, 200, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950, 1000 mmAny combination of B × H
Description
Parts and characteristics
Ready-to-install shut-off damperBlades with gearsDrive arm with drive shaft and bearing plate
Attachments
Quadrant stays and limit switches: Quadrant stays to adjust the damper blades (stepless adjustment) and for capturing the end positionsOpen/Close actuators: Actuators for opening and closing multileaf dampersModulating actuators: Actuators for stepless blade adjustmentPneumatic actuators: Pneumatic actuators for opening and closing multileaf dampers
Accessories
MULTILEAF DAMPER,VARIANT JZ-AL
Multileaf damper with actuator
BLADE MECHANISM WITHGEARS
JZ-AL
MULTILEAF DAMPERS MADE OF ALUMINIUM FORSHUTTING OFF THE AIRFLOW IN AIR CONDITIONINGSYSTEMS
Rectangular multileaf dampers for volume flow and pressure controlas well as for shutting off ducts and openings in walls and ceilingslabs
Maximum dimensions 1200 × 1000 mmCasing air leakage to EN 1751, class CAerofoil opposed action bladesBlades interconnected by gears
Optional equipment and accessories
Actuators: Open/Close actuators, modulating actuatorsPowder-coated constructionAnodised construction
Installation subframe: Installation subframe for the fast and simple installation of multileaf dampers
Construction features
Rectangular casing, with screws, material thickness 1.5 mmBlades, material thickness 1.25 mmFlanges on both sides, suitable for duct connection, with corner holesGears on both blade endsBlade shafts, Ø12 mm, with notch to indicate the blade position (not for attachment ZS99)Bearings with ring sealsWith drive shaft as an attachment: For the position of the drive shaft see 'Dimensions and weight'With actuator as an attachment: The actuator is attached to either the first blade from the top (with up to 3 blades) or to the third blade from the top (with 4 or moreblades)
Materials and surfaces
Casing and blades made of extruded aluminium sectionsShafts, bearing plate and position indicator made of galvanised steelGears made of special anti-static plasticP1: Powder-coated, RAL CLASSIC colourPS: Powder-coated, DB colourS3: Anodised to EURAS standard, E6-C-0
Standards and guidelines
Casing air leakage to EN 1751, class C
Maintenance
Maintenance-free as construction and materials are not subject to wearContamination should be removed as it may lead to corrosion and to increased closed blade air leakage
TECHNICAL INFORMATION
Function, Technical data, Quick sizing, Specification text, Order code, Related products
Functional description
Multileaf dampers with gears can only have opposed action blades.
The internal gears transfer the synchronous rotational movement from the drive arm to the individual blades.
Schematic illustration of JZ-AL
① Casing② Opposed blades③ Gears④ Actuator⑤ Bearing plate and drive shaft
The torque for closing a multileaf damper must be such that the damper can be safely opened and closed.
For closure, the torque must suffice to ensure complete shut-off by the blades.
Opening is initiated without aerodynamic forces.
When air flows through the damper, the aerodynamic forces of the airflow create a closing force (torque) on the blades; this happens independent of the direction ofthe airflow. This closing force must be countered, or overcome. The blade position, or blade angle α, for which there is the largest torque depends, among otherfactors, on the fan characteristics.
Nominal sizes
Maximum static differential pressure for a closed multileaf damper
Intermediate sizes: Intermediate widths can be interpolated
JZ-AL, sound power level for a closed multileaf damper
ΔpArea B × H [m²]
0.04 0.09 0.16 0.25 0.36
Δp L
Pa dB(A)
100 42 45 48 50 51
200 49 53 55 57 59
500 59 >60 >60 >60 >60
1000 >60 >60 >60 >60 >60
1500 >60 >60 >60 >60 >60
2000 >60 >60 >60 >60 >60
st
st WA
Quick sizing tables provide a good overview of the sound power levels and differential pressures that can be expected. Approximate intermediate valuescan be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design programme.
The sound power levels L apply to multileaf dampers with a cross-sectional area (B × H) of 1 m².
The differential pressures apply to multileaf dampers installed in ducts (installation type A).
JZ-AL, differential pressure and sound power level
vDamper blade position α
OPEN 20° 40°
v Δp L Δp L Δp L
m/s Pa dB(A) Pa dB(A) Pa dB(A)
0.5 <5 <30 <5 <30 <5 <30
1 <5 <30 <5 <30 8 35
2 <5 <30 <5 32 32 51
4 <5 43 12 48 125 67
6 <5 52 24 57 275 76 >2000
8 10 59 45 64 490 83 >2000
10 14 64 70 69 765 88 >2000
Installation type A
Ducts on both sides
Installation type B
WA
st WA st WA st WA
Air discharge
Installation type C
Air intake
Installation type D
Air transfer
Rectangular multileaf dampers for volume flow and pressure control as well as for shutting off ducts and openings in walls and ceiling slabs.
Ready-to-operate unit which consists of the casing, aerofoil blades and the blade mechanism.
Flanges on both sides, suitable for duct connection.
The blade position is indicated externally by a notch in the blade shaft extension.
Casing air leakage to EN 1751, class C.
Special characteristics
Aerofoil bladesLow-maintenance, robust constructionNo parts with silicone
Materials and surfaces
Casing and blades made of extruded aluminium sectionsShafts, bearing plate and position indicator made of galvanised steelGears made of special anti-static plasticP1: Powder-coated, RAL CLASSIC colourPS: Powder-coated, DB colourS3: Anodised to EURAS standard, E6-C-0
Technical data
Nominal sizes: 200 × 100 mm – 1200 × 1000 mmMaximum static differential pressure for a closed multileaf damper: 2000 PaOperating temperature: 0 to 90 °C
Sizing data
V _______________________ [m³/h]Δp _______________________ [Pa]
Air-regenerated noise
L _______________________ [dB(A)]
st
PA
Attachments, Dimensions and weight, Product details
Order example: JZ-AL/600×850/ZF01/NO/P1–RAL7001
Nominal size
Installation subframe
Attachments Spring return actuator, 10 Nm, 24 V AC/DC
Damper blade position
Surface Powder-coated, RAL 7001, silver grey
Type
JZ-AL Aluminium multileaf damper
Nominal size [mm]
B × H
Installation subframe
No entry: noneER With
Attachments
No entry: noneZ04 – Z07 Quadrant stayZ12 – Z51 ActuatorsZF01 – ZF15 Spring return actuatorsZ60 – Z77 Pneumatic actuators
Damper blade safety function
Only for spring return actuators or pneumatic actuatorsNO Pressure off/power off to OPENNC Pressure off/power off to CLOSE
Surface
No entry: standard constructionP1 Powder-coated, specify RAL CLASSIC colourPS Powder-coated, specify DB colourS3 Anodised to EURAS standard, E6-C-0
Gloss level RAL 9010 50 % RAL 9006 30 % All other RAL colours 70 %
Attachments
Type Quadrant stays and limit switchesType Open/Close actuatorsType Modulating actuatorsType Pneumatic actuatorsType Explosion-proof actuators