Multileaf damper with actuator
Application
Special characteristics
Classification
Air leakage with closed multileaf damper according to EN 1751:
Test pressure up to 2000 Pa
Nominal sizes
Construction
Duct connection
Bearings
Blades
Only for steel or stainless steel multileaf dampers with brass or stainless steel bearings (JZ-...-M, JZ-...-E)
Parts and characteristics
Attachments
Accessories
Construction features
Material and surfaces
Standards and guidelines
Maintenance
Multileaf dampers with external linkage can have parallel action blades or opposed action blades. An external linkage transfers the synchronous rotational movement from the drive arm to the individual blades. Even very large multileaf dampers can be safely opened and closed with this type of linkage. Opposed action blades close at various speeds as the linkage includes a transverse link. This facilitates the closing process and reduces the air leakage in closed multileaf dampers.
The torques for operating multileaf dampers must be dimensioned in such a way 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 the impact of 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 of the airflow. This closing force must be countered, or overcome. The blade angle α with the largest torque dependently of among other things, on the fan characteristics.
Nominal sizes | 200 × 180 – 2000 × 1995 mm |
Operating temperature | 0 – 100 °C |
Minimum torques [Nm]
H | B | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | |
180 – 1995 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
Steel and stainless steel multileaf dampers, free cross-sectional area [m²]
H | B | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
200 | 400 | 600 | 800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | |
180 – 344 | 0.03 | 0.06 | 0.09 | 0.12 | 0.15 | 0.18 | 0.21 | 0.24 | 0.27 | 0.3 |
345 – 509 | 0.06 | 0.11 | 0.17 | 0.23 | 0.28 | 0.34 | 0.4 | 0.45 | 0.51 | 0.57 |
510 – 674 | 0.08 | 0.17 | 0.25 | 0.33 | 0.42 | 0.5 | 0.58 | 0.67 | 0.75 | 0.83 |
675 – 839 | 0.11 | 0.22 | 0.33 | 0.44 | 0.55 | 0.66 | 0.77 | 0.88 | 0.99 | 1.1 |
840 – 1004 | 0.14 | 0.27 | 0.41 | 0.55 | 0.69 | 0.82 | 0.96 | 1.1 | 1.23 | 1.37 |
1005 – 1169 | 0.16 | 0.33 | 0.49 | 0.66 | 0.82 | 0.98 | 1.15 | 1.31 | 1.47 | 1.64 |
1170 – 1334 | 0.19 | 0.38 | 0.57 | 0.76 | 0.95 | 1.14 | 1.33 | 1.52 | 1.72 | 1.91 |
1335 – 1499 | 0.22 | 0.43 | 0.65 | 0.87 | 1.09 | 1.3 | 1.52 | 1.74 | 1.96 | 2.17 |
1500 – 1664 | 0.24 | 0.49 | 0.73 | 0.98 | 1.22 | 1.47 | 1.71 | 1.95 | 2.2 | 2.44 |
1665 – 1829 | 0.27 | 0.54 | 0.81 | 1.08 | 1.36 | 1.63 | 1.9 | 2.17 | 2.44 | 2.71 |
1830 – 1994 | 0.3 | 0.6 | 0.89 | 1.19 | 1.49 | 1.79 | 2.08 | 2.38 | 2.68 | 2.98 |
1995 | 0.32 | 0.65 | 0.97 | 1.3 | 1.62 | 1.95 | 2.27 | 2.6 | 2.92 | 3.25 |
Intermediate sizes: Interpolate values between widths.
Maximum permissible static differential pressure [Δpmax t] in the case of closed multileaf damper
Construction | B | ||||||
---|---|---|---|---|---|---|---|
800 | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | |
Standard construction | 2500 | 2000 | 1650 | 1400 | 1250 | 1100 | 1000 |
Brass bearings (-M) | 3000 | 2500 | 2200 | 1950 | 1750 | 1600 | 1500 |
Stainless steel bearings (-E) | 3000 | 2500 | 2200 | 1950 | 1750 | 1600 | 1500 |
Reinforced blades (-MV, -E-V) | 3500 | 3000 | 2700 | 2500 | 2300 | 2100 | 2000 |
Sound power level for a closed multileaf damper LWA [dB(A)]
Δpt | Area B × H [m²] | |||||||
---|---|---|---|---|---|---|---|---|
0.14 | 0.2 | 0.4 | 0.6 | 0.8 | 1.2 | 2 | 4 | |
100 | 43 | 45 | 48 | 50 | 51 | 53 | 55 | 58 |
200 | 51 | 53 | 56 | 58 | 59 | 61 | 63 | 66 |
500 | 62 | 63 | 66 | 68 | 69 | >70 | >70 | >70 |
1000 | 69 | >70 | >70 | >70 | >70 | >70 | >70 | >70 |
1500 | >70 | >70 | >70 | >70 | >70 | >70 | >70 | >70 |
2000 | >70 | >70 | >70 | >70 | >70 | >70 | >70 | >70 |
Quick sizing tables provide a good overview of the sound power levels and differential pressures that can be expected. Approximate intermediate values can be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design program.
The sound power levels LWA 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-LL, JZ-LL-A2, JZ-HL, differential pressure and sound power level Δpt [Pa] LWA [dB(A)] Δpt [Pa] LWA [dB(A)] Δpt [Pa] LWA [dB(A)] Δpt [Pa] LWA [dB(A)] Δpt [Pa] LWA [dB(A)]
v [m/s] Damper blade position α OPEN 20° 40° 60° 80° 0.5 <5 <30 <5 <30 <5 7.5 22 34 250 63 1 <5 <30 <5 <30 8 26 85 53 1000 83 2 <5 <30 <5 <30 30 46 345 73 >2000 >90 4 <5 41 10 44 120 65 1385 >90 >2000 >90 6 <5 52 24 56 270 77 >2000 >90 >2000 >90 8 10 60 42 64 480 85 >2000 >90 >2000 >90
Rectangular multileaf dampers for volume flow and pressure control as well as for low-leakage shut-off of 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. Closed multileaf damper air leakage according to EN 1751, class 2 (B ≤ 600 mm, class 1) Casing leakage according to EN 1751, class C.
Special characteristics
Material and surfaces
Construction
Duct connection
Bearings
Blades
Only for steel or stainless steel multileaf dampers with brass or stainless steel bearings (JZ-...-M, JZ-...-E)
Technical data
Nominal sizes: 200 × 180 mm – 2000 × 1995 mm
Sizing data
Air-regenerated noise
JZ-HL | – | G | – | M | – | – | L | / | 1000 × 1005 | / | ER | / | Z64 | / | NC | / | P1 - RAL 9010 | |
| | | | | | | | | | | | | | | | | | | | |||||||||
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
Order example: JZ-HL–G–M–V–L/1200×675/ER/ZF06/NC
Duct connection | Flange holes on both sides |
Bearings | Brass bearings |
Construction of blades | Reinforced blades |
Operating side | Left side |
Nominal size | 1200 × 675 mm |
Installation subframe | With |
Attachments | Spring return actuator, 20 Nm, 24 V AC/DC |
Damper blade position | Power off to CLOSE |
User interface | Standard construction |
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Contact
We are here for you
Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265