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Multileaf damper, variant JZ-P-A2

Multileaf damper with actuator

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Parallel blades

Parallel blades 

 

 

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Opposed blades

Opposed blades

 

 

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JZ

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 2000 × 1995 mm
  • Casing air leakage to EN 1751, class C
  • Aerofoil parallel or opposed action blades
  • Blades interconnected by external linkage (for parallel or opposed blade action)
  • Available in standard sizes and many intermediate sizes
  • Can be combined with external weather louvres

 


Optional equipment and accessories


  • Actuators: Open/close actuators, modulating actuators
  • Explosion-proof construction with pneumatic actuator or spring return actuator
  • Powder-coated construction

 

Allgemeine Informationen

Application

  • Multileaf dampers as a control element in the volume flow rate and differential pressure control in ventilation and air conditioning systems
  • For shutting off ducts and openings in walls and ceiling slabs
  • Parallel action blades are preferably used for opening/closing
  • Due to their characteristics, opposed action blades are preferable for variable operation
  • Steel and stainless steel variants with brass or stainless steel bearings are suitable for use in potentially explosive atmospheres (ATEX)


Special characteristics

  • Aerofoil blades
  • Low-maintenance, robust construction
  • No parts with silicone
  • Available in standard sizes and many intermediate sizes



Nominal sizes

  • B: 200 – 2000 mm, in increments of 1 mm
  • Width subdivided (BM): 2001 – 4150 mm, in increments of 1 mm
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665, 1830, 1995 mm (intermediate sizes 183 – 1995 in increments of 1 mm, except for standard size H - 1 mm, H + 1 mm, H + 2 mm)
  • Height subdivided (HM): 1999 – 4066 mm, in increments of 1 mm
  • Any combination of B × H



Variants

  • JZ-S: Multileaf damper with opposed blade action, made of galvanised sheet steel
  • JZ-P: Multileaf damper with parallel blade action, made of galvanised sheet steel
  • JZ-S-A2: Multileaf damper with opposed blade action, made of stainless steel
  • JZ-P-A2: Multileaf damper with parallel blade action, made of stainless steel



Construction

Duct connection



  • Corner holes on both sides
  • G: Flange holes on both sides


Bearings



  • Plastic bearings, operating temperature -20 – 100 °C
  • M: Brass bearings, operating temperature -20 – 150 °C
  • E: Stainless steel bearings, operating temperature -20 – 150 °C


Blades



Only for steel or stainless steel multileaf dampers with brass or stainless steel bearings (JZ-...-M, JZ-...-E)



  • V: Reinforced blades available from width 800 mm


Parts and characteristics

  • Ready-to-install shut-off damper
  • Blades with external linkage
  • Drive arm



Attachments

  • Quadrant stays and limit switches for the infinite adjustment of the multileaf dampers and for capturing the end positions
  • Open/close actuators for opening and closing multileaf dampers
  • Modulating actuators for variable damper blade positions
  • Pneumatic actuators for opening and closing multileaf dampers
  • Explosion-proof actuators for opening and closing multileaf dampers



Accessories

  • Installation subframes for the fast and simple installation of multileaf dampers


Construction features

  • Rectangular casing, welded (P1: casing with screws), material thickness galvanised steel 1.25 mm, stainless steel A2 = 1.2 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connections, either corner holes or flange holes
  • External linkage, robust and durable, consisting of the coupling rod and horizontal arms
  • Damper blade shafts, Ø12 mm, with notch to indicate the damper blade position (not for ZS99)
  • With spindle as an attachment: For the position of the spindle, see "Dimensions and weights"
  • With actuator as an attachment: The actuator is always attached to the second blade from the top
  • Construction and the selection of materials comply with the criteria stipulated in EU directives, referred to as ATEX (for use in potentially explosive atmospheres) for variants with brass or stainless steel bearings (-M, -E)



Material and surfaces

  • Casing and blades made of galvanised sheet steel or stainless steel
  • Blade shafts, drive arms and external linkages made of galvanised steel or stainless steel
  • Plastic, brass or stainless steel bearings
  • P1: powder-coated, RAL CLASSIC colour
  • PS: powder-coated, DB colour



Standards and guidelines

  • Casing air leakage to EN 1751, class C



Maintenance

  • Maintenance-free, given that construction and the materials used are not subject to wear
  • Contamination should be removed as it may lead to corrosion and to increased air leakage in closed multileaf dampers


Technical information

Function, Technical data, Quick sizing, Specification text, Order code

  • Function
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE

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 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.


 


Nominal sizes200 × 180 – 2000 × 1995 mm
Operating temperature-20 to 100 °C



JZ-*, JZ-*-A2, minimum torques [Nm]


HB
200400600800100012001400160018002000
180 – 199510101010101010101010


Steel and stainless steel multileaf dampers, free cross-sectional area [m2]

H

B

200

400

600

800

1000

1200

1400

1600

1800

2000

1800.030.060.090.120.150.180.210.240.270.3
3450.060.110.170.230.280.340.40.450.510.57
5100.080.170.250.330.420.50.580.670.750.83
6750.110.220.330.440.550.660.770.880.991.1
8400.140.270.410.550.690.820.961.11.231.37
10050.160.330.490.660.820.981.151.311.471.64
11700.190.380.570.760.951.141.331.521.721.91
13350.220.430.650.871.091.31.521.741.962.17
15000.240.490.730.981.221.471.711.952.22.44
16650.270.540.811.081.361.631.92.172.442.71
18300.30.60.891.191.491.792.082.382.682.98
19950.320.650.971.31.621.952.272.62.923.25

Intermediate sizes: Interpolate values between widths.



Maximum permitted differential pressure Δpmax t [Pa] in the case of closed multileaf damper

Construction

B

800

1000

1200

1400

1600

1800

2000

Standard construction2500200016501400125011001000
Brass bearings (-M)3000250022001950175016001500
Stainless steel bearings (-E)3000250022001950175016001500
Reinforced blades (-M-V, -E-V)3500300027002500230021002000


JZ-S, JZ-S-A2, sound power level LWA [dB (A)] in the case of closed multileaf damper

Δpt [Pa]

Area B × H [m²]

0.14

0.2

0.4

0.6

0.8

1.2

2

4

1005758616364666871
2006365686971727577
5007172767879818384

1000

78

80

82

84

85

88

90

>90

1500

81

83

86

88

89

>90

>90

>90

2000

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

Δpt [Pa]

Area B × H [m²]

0.14

0.2

0.4

0.6

0.8

1.2

2

4

1005758616364646871
2006365686971717578
5007172767879798587

1000

78

80

82

84

85

85

89

>90

1500

81

82

86

88

89

89

>90

>90

2000

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


v [m/s]

Damper blade position α
OPEN

20°

40°

60°

80°

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)]

0.5

<5

<30

<5

<30

<5

<30

22

44

255

67

1<5<30<5<308388559101082
2<531<535285333574>2000>90
4<546105011068139589>2000>90
6<555225925077>2000>90>2000>90
8861406544083>2000>90>2000>90



JZ-P, JZ-P-A2, differential pressure and sound power level


v [m/s]

Damper blade position α

OPEN

20°

40°

60°

80°

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)]

0.5

<5 

<30

<5

<30

<5

<30

<5

<30

12

42

1<5<30<5<30<5<3012404560
2<5<30<5301041455718577
4<541648405817075750>90
6<55114588569385851685>90
8<558256515076685>90>2000>90

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 blades
  • Low-maintenance, robust construction
  • No parts with silicone
  • Available in standard sizes and many intermediate sizes



Material and surfaces

  • Casing and blades made of galvanised sheet steel or stainless steel
  • Blade shafts, drive arms and external linkages made of galvanised steel or stainless steel
  • Plastic, brass or stainless steel bearings
  • P1: powder-coated, RAL CLASSIC colour
  • PS: powder-coated, DB colour



Construction

Duct connection



  • Corner holes on both sides
  • G: Flange holes on both sides


Bearings



  • Plastic bearings, operating temperature -20 – 100 °C
  • M: Brass bearings, operating temperature -20 – 150 °C
  • E: Stainless steel bearings, operating temperature -20 – 150 °C


Blades



Only for steel or stainless steel multileaf dampers with brass or stainless steel bearings (JZ-...-M, JZ-...-E)



  • V: Reinforced blades available from width 800 mm


Technical data



  • Nominal sizes: 200 × 180 mm – 2000 × 1995 mm
  • Operating temperature: -20 to 100 °C



Sizing data



  • qv (m³/h)
  • Δpt [Pa]

Air-regenerated noise

  • LPA [dB(A)]


JZPA2GML/1000 × 1005/ER/Z64/NC/P1 - RAL 9010
||||||||||||
123456789101112
1 Type
JZ
Multileaf damper

2 Function
S
Opposed (standard)
P Parallel

3 Material
No entry: galvanised steel
A2 Stainless steel

4 Duct connection
No entry: corner holes on both sides,
G Flange holes on both sides (no corner holes)

5 Bearings
No entry: plastic bearings
M Brass bearings
E Stainless steel bearings

6 Construction of blades
Only for steel or stainless steel multileaf dampers with brass or stainless steel bearings
V Reinforced blades, available from width 800 mm

7 Operating side
No entry: right
L left

8 Nominal size [mm]
Specify size width × height

Galvanised steel variants are available with the width or height subdivided
Width > 2000: width subdivided
Height > 1995: height subdivided

9 Installation subframe
No entry: without installation subframe
ER With installation subframe (duct connection G only)

10 Attachments
No entry: without attachments
Z04 – Z07 Hold open device
Z12 – Z51 Actuators
ZF01 – ZF15 Spring return actuators
Z60 – Z77 Pneumatic actuators

Explosion-proof actuators
Z1EX, Z3EX Electrical
Z60EX – Z77EX Pneumatic

11 Damper blade safety function
Only with spring return actuators or pneumatic actuators
NO pressure off/power off to OPEN (Normally Open)
NC pressure off/power off to CLOSE (Normally Closed)

12 Surface
No entry: standard construction
P1 powder-coated, specify RAL CLASSIC colour

Gloss level
RAL 9010 GU 50
RAL 9006 GU 30
All other RAL colours GU 70


Order example: JZ–S–G–M–V–L/800×510/ER/Z43

FunctionOpposed
MaterialGalvanised steel
Duct connectionFlange holes on both sides
BearingsBrass bearings
Construction of bladesReinforced blades
Operating sideLeft
Nominal size800 × 510 mm
Installation subframeWith
AttachmentsActuator, 10 Nm, 230 V AC, 3-point
User interfaceStandard construction

Variants

  • VARIANTEN


Downloads

product information

certificates

operation manuals

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Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051