JZ-LL

For extremely low-leakage shut-off in air conditioning systems

Rectangular multileaf dampers for volume flow and pressure control as well as for extremely low-leakage shut-off of ducts and openings in walls and ceiling slabs

  • Maximum dimensions 2000 × 1995 mm
  • Closed blade air leakage to EN 1751, classes 3 – 4, depending on size
  • Casing air leakage to EN 1751, class C
  • Aerofoil opposed action blades
  • Closed cell side seals meet increased hygiene requirements
  • Blades interconnected by external linkage
  • Available in standard sizes and many intermediate sizes


Optional equipment and accessories

  • Actuators: Open/Close actuators, modulating actuators
  • Explosion-proof construction with pneumatic actuator or spring return actuator
  • Powder-coated construction
Multileaf damper, variant JZ-LL 00133451_0

Multileaf damper with explosion-proof actuator

  • Application
  • Description

Application

  • Multileaf dampers of Type JZLL are used as an acting element in the volume flow and pressure control in air conditioning systems
  • For extremely low-leakage shut-off of ducts and openings in walls and ceiling slabs
  • Stainless steel and powder-coated constructions with increased corrosion resistance if required
  • 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
  • Closed cell side seals meet increased hygiene requirements

Classification

Closed blade air leakage to EN 1751

Test pressure up to 2000 Pa

  • Up to B = 599 mm, class 3
  • B = 600 – 1000 mm, class 4

Test pressure up to 1000 Pa

  • Up to B = 599 mm, class 3
  • B = 600 – 2000 mm, class 4

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 – 1998 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-LL: Multileaf damper with opposed blade action, made of galvanised sheet steel
  • JZ-LL-A2: Multileaf damper with opposed 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 0 – 100 °C
  • M: Brass bearings, operating temperature 0 – 100 °C
  • E: Stainless steel bearings, operating temperature 0 – 100 °C


Blades

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

  • V: reinforced blades

Parts and characteristics

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

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
  • Explosion-proof actuators: Actuators for opening and closing multileaf dampers installed in potentially explosive atmospheres

Accessories

  • Installation subframe: Installation subframe for the fast and simple installation of multileaf dampers

Construction features

  • Rectangular casing, welded (P1: casing with screws), material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, either flange holes or corner holes
  • External linkage, robust and durable, consisting of the coupling rod and and horizontal arms
  • Blade shafts, Ø12 mm, with notch to indicate the blade position (not for attachment ZS99)
  • With 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 the second blade from the top
  • Travel stop (angle section) ensures tight closure of the top and bottom blades
  • Blade tip seals and side seals
  • Construction and materials comply with the EU directive and guidelines for use in potentially explosive atmospheres (ATEX) for variants with brass or stainless steel bearings (-M, -E)

Materials and surfaces

  • Casing and blades made of galvanised sheet steel or stainless steel
  • Blade shafts, drive arm and external linkage made of galvanised steel or stainless steel
  • Plastic, brass or stainless steel bearings
  • Blade tip seals made of PP/PTV plastic
  • Side seals made of closed cell PE foam
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour

Standards and guidelines

  • Casing air leakage to EN 1751, class C
  • Meets the general requirements of DIN 1946, part 4, with regard to the acceptable closed blade air leakage
  • Multileaf damper sizes from B = 600 mm meet the increased requirements of DIN 1946, part 4, with regard to the maximum closed blade air leakage

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Contamination 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

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
  • Related products
Schematic illustration of JZ-LL-A2 00104315_0..
① Casing
② Slide disc
③ Opposed blades
④ Side seal
⑤ Blade tip seal
⑥ Travel stop (angle section with seal)
⑦ Actuator
⑧ Transverse link
⑨ External linkage


Functional description

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 different speeds since the linkage includes a transverse link. This facilitates the closing process and reduces the closed blade air leakage.

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 of the 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 other factors, on the fan characteristics.

Nominal sizes

200 × 180 mm – 2000 × 1995 mm

Operating temperature

0 – 100 °C


JZ-LL, JZ-LL-A2, minimum torque

HB [mm]
H200400600800100012001400160018002000
mmNm

180

10

10

10

10

10

10

10

10

10

10

345

10

10

10

10

10

10

10

10

10

10

510

10

10

10

10

10

10

10

10

10

10

675

10

10

10

10

10

10

15

15

15

15

840

10

10

10

10

15

15

15

15

15

15

1005

10

10

15

15

15

15

15

15

20

20

1170

15

15

15

15

15

15

20

20

30

30

1335

15

15

15

15

20

20

30

30

30

30

1500

15

15

15

20

20

30

30

30

30

30

1665

20

20

20

20

30

30

30

30

30

30

1830

20

20

20

20

30

30

30

30

30

30

1995

20

20

20

20

30

30

30

30

30

30


Steel and stainless steel multileaf dampers, free area

HB [mm]
H200400600800100012001400160018002000
mm

180 – 344

0.03

0.06

0.09

0.12

0.15

0.18

0.21

0.24

0.27

0.30

345 – 509

0.06

0.11

0.17

0.23

0.28

0.34

0.40

0.45

0.51

0.57

510 – 674

0.08

0.17

0.25

0.33

0.42

0.50

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

1.10

840 – 1004

0.14

0.27

0.41

0.55

0.69

0.82

0.96

1.10

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

1.30

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

2.20

2.44

1665 – 1829

0.27

0.54

0.81

1.08

1.36

1.63

1.90

2.17

2.44

2.71

1830 – 1994

0.30

0.60

0.89

1.19

1.49

1.79

2.08

2.38

2.68

2.98

1995

0.32

0.65

0.97

1.30

1.62

1.95

2.27

2.60

2.92

3.25

Intermediate sizes: Intermediate widths can be interpolated


Maximum static differential pressure for a closed multileaf damper

ConstructionB [mm]
Construction800100012001400160018002000
ConstructionΔpst max
ConstructionPa

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 (-M-V, -E-V)

3500

3000

2700

2500

2300

2100

2000


JZ-LL, JZ-LL-A2, sound power level for a closed multileaf damper

ΔpstArea [m²]
Δpst0.140.20.40.60.81.224
ΔpstLWA
PadB(A)

100

<35

35

38

39

41

42

45

48

200

41

42

45

47

48

50

53

56

500

51

52

55

57

58

60

62

65

1000

58

60

63

64

66

68

70

>70

1500

63

64

67

69

>70

>70

>70

>70

2000

65

67

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 programme.

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

vDamper blade position α
vOPEN20°40°60°80°
vΔpstLWAΔpstLWAΔpstLWAΔpstLWAΔpstLWA
m/sPadB(A)PadB(A)PadB(A)PadB(A)PadB(A)

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

10

14

67

65

70

750

>90

>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 blade air leakage to EN 1751, class 4.

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
  • Closed cell side seals meet increased hygiene requirements

Materials and surfaces

  • Casing and blades made of galvanised sheet steel or stainless steel
  • Blade shafts, drive arm and external linkage made of galvanised steel or stainless steel
  • Plastic, brass or stainless steel bearings
  • Blade tip seals made of PP/PTV plastic
  • Side seals made of closed cell PE foam
  • 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 0 – 100 °C
  • M: Brass bearings, operating temperature 0 – 100 °C
  • E: Stainless steel bearings, operating temperature 0 – 100 °C


Blades

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

  • V: reinforced blades

Technical data

  • Nominal sizes: 200 × 180 mm – 2000 × 1995 mm
  • Operating temperature: 0 to 100 °C

Sizing data

  • V _______________________ [m³/h]
  • Δpst _______________________ [Pa]

Air-regenerated noise

  • LPA _______________________ [dB(A)]
00225049_0

 Type
JZ-LL       Low-leakage multileaf damper, Closed blade air leakage to EN 1751, classes 3 – 4

 Material
       No entry: galvanised steel
A2       Stainless steel

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

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

 Construction of blades
       Only for steel or stainless steel multileaf dampers with brass or stainless steel bearings
V       reinforced blades

 Operating side
       No entry: on the right
L       Left side

 

 Nominal size [mm]
       B × H
       B > 2000 = width subdivided
       H > 1998 = height subdivided

 Installation subframe
       No entry: none
ER       With (only for construction G)

 Attachments
       No entry: none
Z04 – Z07 Quadrant stay
Z12 – Z51 Actuators
ZF01 – ZF15 Spring return actuators
Z60 – Z77 Pneumatic actuators
       Explosion-proof actuators
Z1EX, Z3EX Electric
Z60EX – Z77EX Pneumatic

 Damper blade safety function
       Only for spring return actuators or pneumatic actuators
NO       Pressure off/power off to OPEN
NC       Pressure off/power off to CLOSE

 Surface
       No entry: standard construction
P1       Powder-coated, specify RAL CLASSIC colour
PS       Powder-coated, specify DB colour

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

Order example: JZ-LL–G–L/1200×675/ER/ZF06/NC

Material

Galvanised steel

Duct connection

Flange holes on both sides

Bearings

Plastic bearings

Construction of blades

Standard

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

Surface

Standard construction


 

Variants, Attachments, Dimensions and weight, Product details

  • Variants
  • Attachments
  • Dimensions and weight
  • Product details

JZ-LL

Variant

  • JZ-LL: Multileaf damper with opposed blade action, made of galvanised sheet steel

Materials and surfaces

  • Casing and blades made of galvanised sheet steel
  • Blade shafts, drive arm and external linkage made of galvanised steel
  • Blade tip seals made of PP/PTV plastic
  • Side seals made of closed cell PE foam
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour

JZ-LL-A2

Variant

  • JZ-LL-A2: Multileaf damper with opposed blade action, made of stainless steel

Materials and surfaces

  • Casing, blades and external linkage made of stainless steel, material no. 1.4301
  • Shafts made of stainless steel, material no. 1.4305
  • Blade tip seals made of PP/PTV plastic
  • Side seals made of closed cell PE foam
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour

Materials

Order code detailPartMaterial

Casing

Galvanised sheet steel

Blades

Galvanised sheet steel

Shafts

Galvanised steel

Drive arm

Galvanised steel

Linkage

Galvanised steel

Blade tip seals

Plastic (PP/PTV)

Blade side seals

Closed cell PE foam

Bearings

Plastic

A2

Casing

Stainless steel, material no. 1.4301

A2

Blades

Stainless steel, material no. 1.4301

A2

Shafts

Stainless steel, material no. 1.4305

A2

Linkage

Stainless steel, material no. 1.4301

E

Bearings

Stainless steel

M

Bearings

Brass


Surfaces

Order code detailPartSurface

Casing

Untreated

P1-RAL ...

Blades

Powder-coated, RAL ... CLASSIC

PS-DB ...

Blades

Powder-coated, DB ...


Quadrant stays and limit switches

Order code detailMeaningLimit switchFunction

Z04

Quadrant stay


Z05

Quadrant stay

1

Damper blade position CLOSED

Z06

Quadrant stay

1

Damper blade position OPEN

Z07

Quadrant stay

2

Damper blade positions CLOSED nad OPEN


Open/Close actuators

Order code detailMeaningFunctionSupply voltageTorqueAuxiliary switch

Z12

SM230A

–1-wire-control –2-wire-control (3-point)

100 – 240 V AC

20 Nm

Z13

GM230A

–1-wire-control –2-wire-control (Open/Close)

100 – 240 V AC

40 Nm

Z14

SM24A

–1-wire-control –2-wire-control (3-point)

24 V AC/DC

20 Nm

Z15

GM24A

–1-wire-control –2-wire-control (Open/Close)

24 V AC/DC

40 Nm

Z16

SM230A

–1-wire-control –2-wire-control (3-point)

100 – 240 V AC

20 Nm

S2A

Z17

GM230A

–1-wire-control –2-wire-control (3-point)

100 – 240 V AC

40 Nm

S2A

Z18

SM24A

–1-wire-control –2-wire-control (3-point)

24 V AC/DC

20 Nm

S2A

Z19

GM24A

–1-wire-control –2-wire-control (3-point)

24 V AC/DC

40 Nm

S2A

Z43

NM230A

–1-wire-control –2-wire-control (3-point)

100 – 240 V AC

10 Nm

Z45

NM24A

–1-wire-control –2-wire-control (3-point)

24 V AC/DC

10 Nm

Z47

NM230A

–1-wire-control –2-wire-control (3-point)

100 – 240 V AC

10 Nm

S2A

Z49

NM24A

–1-wire-control –2-wire-control (3-point)

24 V AC/DC

10 Nm

S2A

Minimum torque of multileaf damper has to be considered when selecting the actuator.


Open/Close actuators, fast-running

Order code detailMeaningFunctionSupply voltageTorqueAuxiliary switch

ZS21

SMQ24A

–1-wire-control

24 V AC/DC

16 Nm

ZS22

SMQ24A

–1-wire-control

24 V AC/DC

16 Nm

S2A

Only for nominal sizes with a minimum torque not exceeding 16 Nm.


Open/Close actuators, spring return

Order code detailMeaningFunctionSupply voltageTorqueAuxiliary switch

ZF01

NF24A

Supply voltage on/off

24 V AC/DC

10 Nm

ZF02

NFA

Supply voltage on/off

24 – 240 V AC 24 – 125 V DC

10 Nm

ZF03

NF24A-S2

Supply voltage on/off

24 V AC/DC

10 Nm

integrated

ZF04

NFA-S2

Supply voltage on/off

24 – 240 V AC 24 – 125 V DC

10 Nm

integrated

ZF06

SF24A

Supply voltage on/off

24 V AC/DC

20 Nm

ZF07

SFA

Supply voltage on/off

24 – 240 V AC 24 – 125 V DC

20 Nm

ZF08

SF24A-S2

Supply voltage on/off

24 V AC/DC

20 Nm

integrated

ZF09

SFA-S2

Supply voltage on/off

24 – 240 V AC 24 – 125 V DC

20 Nm

integrated

ZF11

EF24A

Supply voltage on/off

24 V AC/DC

30 Nm

ZF12

EF230A

Supply voltage on/off

100 – 240 V AC

30 Nm

ZF13

EF24A-S2

Supply voltage on/off

24 V AC/DC

30 Nm

integrated

ZF14

EF230A-S2

Supply voltage on/off

100 – 240 V AC

30 Nm

integrated

Minimum torque of multileaf damper has to be considered when selecting the actuator.


Modulating actuators

Order code detailMeaningFunctionSupply voltageTorqueAuxiliary switch

Z20

SM24A-SR

2 – 10 V DC

24 V AC/DC

20 Nm

Z21

GM24A-SR

2 – 10 V DC

24 V AC/DC

40 Nm

Z51

NM24A-SR

2 – 10 V DC

24 V AC/DC

10 Nm

Minimum torque of multileaf damper has to be considered when selecting the actuator.


Modulating actuators, spring return

Order code detailMeaningFunctionSupply voltageTorqueAuxiliary switch

ZF05

NF24A-SR

2 – 10 V DC

24 V AC/DC

10 Nm

ZF10

SF24A-SR

2 – 10 V DC

24 V AC/DC

20 Nm

ZF15

EF24A-SR

2 – 10 V DC

24 V AC/DC

30 Nm

Minimum torque of multileaf damper has to be considered when selecting the actuator.


Double acting pneumatic actuators, including explosion-proof actuators

Order code detailMeaningDamper blade safety functionOperating pressureTorque at 6 barLimit switchSolenoid valve
MeaningDamper blade safety functionOperating pressureTorque at 6 barLimit switchSolenoid valve

Z60

Z60EX

DR030

1.2 – 6 bar

35 Nm

Z61

Z61EX

DR030

Power off to close/open

1.2 – 6 bar

35 Nm

24 V DC

Z62

Z62EX

DR030

Power off to close/open

1.2 – 6 bar

35 Nm

230 V AC

Z63

Z63EX

DR030

1.2 – 6 bar

35 Nm

2


Z64

Z64EX

DR030

Power off to close/open

1.2 – 6 bar

35 Nm

2

24 V DC

Z65

Z65EX

DR030

Power off to close/open

1.2 – 6 bar

35 Nm

2

230 V AC

Z66

Z66EX

DR060

1.2 – 6 bar

70 Nm


Z67

Z67EX

DR060

Power off to close/open

1.2 – 6 bar

70 Nm

24 V DC

Z68

Z68EX

DR060

Power off to close/open

1.2 – 6 bar

70 Nm

230 V AC

Z69

Z69EX

DR060

1.2 – 6 bar

70 Nm

2


Z70

Z70EX

DR060

Power off to close/open

1.2 – 6 bar

70 Nm

2

24 V DC

Z71

Z71EX

DR060

Power off to close/open

1.2 – 6 bar

70 Nm

2

230 V AC

① Standard

② Explosion-proof (only with brass or stainless steel bearings)

Minimum torque, depending on nominal size of multileaf damper and the operating pressure have to be considered when selecting the actuator.


Single acting pneumatic actuators, including explosion-proof actuators

Order code detailMeaningDamper blade safety functionOperating pressureTorque at 6 barLimit switchSolenoid valve
MeaningDamper blade safety functionOperating pressureTorque at 6 barLimit switchSolenoid valve

Z72

Z72EX

SC060 SO060

Pressure off to close/open

6 bar

30 Nm



Z73

Z73EX

SC060 SO060

Power off and pressure off to close/open

6 bar

30 Nm


24 V DC

Z74

Z74EX

SC060 SO060

Power off and pressure off to close/open

6 bar

30 Nm


230 V AC

Z75

Z75EX

SC060 SO060

Pressure off to close/open

6 bar

30 Nm

2


Z76

Z76EX

SC060 SO060

Power off and pressure off to close/open

6 bar

30 Nm

2

24 V DC

Z77

Z77EX

SC060 SO060

Power off and pressure off to close/open

6 bar

30 Nm

2

230 V AC

① Standard

② Explosion-proof (only with brass or stainless steel bearings)


Explosion-proof Open/Close actuators, spring return actuators

Order code detailMeaningFunctionSupply voltageTorqueAuxiliary switch

Z1EX

ExMax15-SF

2-wire-control (3-point)

24 – 240 V AC/DC

15 Nm

integrated

Z3EX

ExMax30-SF

2-wire-control (3-point)

24 – 240 V AC/DC

30 Nm

integrated

Only with brass or stainless steel bearings

Z1EX: Only for nominal sizes with a minimum torque up to 15 Nm.


JZ-LL, standard sizes

HNo. of bladesPosition of drive shaft
HNo. of bladesXBlade
mmmm

180

1

90

1

345

2

255

2

510

3

255

2

675

4

255

2

840

5

255

2

1005

6

255

2

1170

7

255

2

1335

8

255

2

1500

9

255

2

1665

10

255

2

1830

11

255

2

1995

12

255

2


JZ-LL, intermediate sizes

HNo. of bladesPosition of drive shaftY
HNo. of bladesXBladeY
mmmmmm

183 – 343

1

90

1

1.5 – 81.5

348 – 508

2

255

2

1.5 – 81.5

513 – 673

3

255

2

1.5 – 81.5

678 – 838

4

255

2

1.5 – 81.5

843 – 1003

5

255

2

1.5 – 81.5

1008 – 1168

6

255

2

1.5 – 81.5

1173 – 1333

7

255

2

1.5 – 81.5

1338 – 1498

8

255

2

1.5 – 81.5

1503 – 1663

9

255

2

1.5 – 81.5

1668 – 1828

10

255

2

1.5 – 81.5

1833 – 1993

11

255

2

1.5 – 81.5

1998

12

255

2

1.5


JZ, JZ-LL, JZ-HL, weight

HB [mm]
H200400600800100012001400160018002000
mmkg

180

4

6

8

9

11

13

14

16

18

19

345

6

8

10

12

15

17

19

21

24

26

510

7

10

13

16

19

22

25

27

30

33

675

10

13

16

20

23

27

30

33

37

40

840

11

15

19

23

28

32

37

41

46

50

1005

11

17

22

27

32

38

43

48

53

59

1170

13

19

25

31

37

43

49

55

61

67

1335

15

22

28

35

41

48

55

61

68

74

1500

16

23

30

37

44

51

59

66

73

80

1665

17

25

33

41

49

57

65

72

80

88

1830

18

27

35

44

52

61

69

78

86

95

1995

19

29

38

47

56

66

75

84

94

103


  • Constructions with flange holes (-G) do not have corner holes
  • Flange holes on casing sizes from width 288 mm and height 212 mm
  • Drive shafts (special accessory) upon request

Steel or stainless steel multileaf dampers, width, no. of flange holes per side

BNo. of holes
Bn
mm

200 – 287

1

288 – 537

2

538 – 787

3

788 – 1037

4

1038 – 1287

5

1288 – 1537

6

1538 – 1787

7

1788 – 2000

8


Steel or stainless steel multileaf dampers, height, no. of flange holes per side

HNo. of holes
Hn
mm

180 – 211

1

212 – 461

2

462 – 711

3

712 – 961

4

962 – 1211

5

1212 – 1461

6

1462 – 1711

7

1712 – 1961

8

1962 – 1995

9


Shaft end projection

Drive shaftMultileaf damper
Drive shaftJZ-LLJZ-LL-A2JZ-HL
Drive shaftA
Drive shaftmm

① Standard

30

26

30

② extended

250

180

250

③ Square 9 mm

37

37

37

④ Square 10 mm

70

60


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • Only with horizontal blades
  • With or without installation subframe
  • Torsion-free installation
  • For widths exceeding 2000 mm or heights exceeding 1995 mm install two multileaf dampers side by side or one above the other
  • Only for installation in internal spaces

Width subdivided, width

B1B
mmmm

2550

1200

2950

1400

3350

1600

3750

1800

4150

2000


Height subdivided, height

H1H
mmmm

2086

1005

2416

1170

2746

1335

3076

1500

3406

1665

3736

1830

4066

1995


Principal dimensions

B [mm]

Duct width

H [mm]

Duct height

n [ ]

Number of flange screw holes

M [kg]

Weight

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise for the multileaf damper

α [°]

Damper blade position, 0°: OPEN, 90°: CLOSED

A [m²]

Upstream cross section

v [m/s]

Airflow velocity based on the upstream cross section (B × H)

V [m³/h] and [l/s]

Volume flow rate

Δpst [Pa]

Static differential pressure

Δpst max [Pa]

Maximum static differential pressure


All sound power levels are based on 1 pW.

Share page

Recommend this page

Recommend this page by sending a link by mail.

Fields marked with an (*) are required fields.

Share page

Thank you for your recommendation!

Your recommendation has been sent and should arrive shortly.


Contact

We are here for you

Visual contact Visual contact

Please specify your message and type of request.
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Visual contact Visual contact

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.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051

Contact

We are here for you

Visual contact Visual contact

Please specify your message and type of request.
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051

Attachment (max. 10MB)

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Visual contact Visual contact

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.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051