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 independently of the direction of the airflow. This closing force must be countered, or overcome. The blade angle α with the largest torque depends, among other things, on the fan characteristics.
200 × 180 – 2000 × 1995 mm |
-20 to 100 °C |
JZ-*, JZ-*-A2, minimum torques [Nm]
Steel and stainless steel multileaf dampers, free cross-sectional area [m2]
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|
0.03 | 0.06 | 0.09 | 0.12 | 0.15 | 0.18 | 0.21 | 0.24 | 0.27 | 0.3 |
0.06 | 0.11 | 0.17 | 0.23 | 0.28 | 0.34 | 0.4 | 0.45 | 0.51 | 0.57 |
0.08 | 0.17 | 0.25 | 0.33 | 0.42 | 0.5 | 0.58 | 0.67 | 0.75 | 0.83 |
0.11 | 0.22 | 0.33 | 0.44 | 0.55 | 0.66 | 0.77 | 0.88 | 0.99 | 1.1 |
0.14 | 0.27 | 0.41 | 0.55 | 0.69 | 0.82 | 0.96 | 1.1 | 1.23 | 1.37 |
0.16 | 0.33 | 0.49 | 0.66 | 0.82 | 0.98 | 1.15 | 1.31 | 1.47 | 1.64 |
0.19 | 0.38 | 0.57 | 0.76 | 0.95 | 1.14 | 1.33 | 1.52 | 1.72 | 1.91 |
0.22 | 0.43 | 0.65 | 0.87 | 1.09 | 1.3 | 1.52 | 1.74 | 1.96 | 2.17 |
0.24 | 0.49 | 0.73 | 0.98 | 1.22 | 1.47 | 1.71 | 1.95 | 2.2 | 2.44 |
0.27 | 0.54 | 0.81 | 1.08 | 1.36 | 1.63 | 1.9 | 2.17 | 2.44 | 2.71 |
0.3 | 0.6 | 0.89 | 1.19 | 1.49 | 1.79 | 2.08 | 2.38 | 2.68 | 2.98 |
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 permitted differential pressure Δpmax t [Pa] in the case of closed multileaf damper
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|
2500 | 2000 | 1650 | 1400 | 1250 | 1100 | 1000 |
3000 | 2500 | 2200 | 1950 | 1750 | 1600 | 1500 |
3000 | 2500 | 2200 | 1950 | 1750 | 1600 | 1500 |
3500 | 3000 | 2700 | 2500 | 2300 | 2100 | 2000 |
JZ-S, JZ-S-A2, sound power level LWA [dB (A)] in the case of closed multileaf damper
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57 | 58 | 61 | 63 | 64 | 66 | 68 | 71 |
63 | 65 | 68 | 69 | 71 | 72 | 75 | 77 |
71 | 72 | 76 | 78 | 79 | 81 | 83 | 84 |
78 | 80 | 82 | 84 | 85 | 88 | 90 | >90 |
81 | 83 | 86 | 88 | 89 | >90 | >90 | >90 |
84 | 85 | 89 | >90 | >90 | >90 | >90 | >90 |
JZ-P, JZ-P-A2, sound power level LWA [Pa] in the case of closed multileaf damper
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57 | 58 | 61 | 63 | 64 | 64 | 68 | 71 |
63 | 65 | 68 | 69 | 71 | 71 | 75 | 78 |
71 | 72 | 76 | 78 | 79 | 79 | 85 | 87 |
78 | 80 | 82 | 84 | 85 | 85 | 89 | >90 |
81 | 82 | 86 | 88 | 89 | 89 | >90 | >90 |
84 | 86 | 89 | >90 | 90 | >90 | >90 | >90 |
Quick sizing tables provide a good overview of the expected sound power levels and differential pressures. Approximate intermediate values can be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design program. The LWA sound power levels 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-S, JZ-S-A2, differential pressure and sound power level
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<5 | <30 | <5 | <30 | <5 | <30 | 22 | 44 | 255 | 67 |
<5 | <30 | <5 | <30 | 8 | 38 | 85 | 59 | 1010 | 82 |
<5 | 31 | <5 | 35 | 28 | 53 | 335 | 74 | >2000 | >90 |
<5 | 46 | 10 | 50 | 110 | 68 | 1395 | 89 | >2000 | >90 |
<5 | 55 | 22 | 59 | 250 | 77 | >2000 | >90 | >2000 | >90 |
8 | 61 | 40 | 65 | 440 | 83 | >2000 | >90 | >2000 | >90 |
JZ-P, JZ-P-A2, differential pressure and sound power level
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|
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<5 | <30 | <5 | <30 | <5 | <30 | <5 | <30 | 12 | 42 |
<5 | <30 | <5 | <30 | <5 | <30 | 12 | 40 | 45 | 60 |
<5 | <30 | <5 | 30 | 10 | 41 | 45 | 57 | 185 | 77 |
<5 | 41 | 6 | 48 | 40 | 58 | 170 | 75 | 750 | >90 |
<5 | 51 | 14 | 58 | 85 | 69 | 385 | 85 | 1685 | >90 |
<5 | 58 | 25 | 65 | 150 | 76 | 685 | >90 | >2000 | >90 |