JZ-HL-introduction-picture
JZ-HL_img_398014

Opposed blades

JZ-HL-introduction-picture
JZ-HL_img_398014

JZ-HL     

For low-leakage shut-off in ventilation and air conditioning systems

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
■ Maximum dimensions 2000 × 1995 mm
■ Closed blade air leakage to EN 1751, classes 1 – 2, depending on size
■ Casing air leakage to EN 1751, class C
■ Aerofoil opposed action blades
■ 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

General information

Application
  • Multileaf dampers as a control element in the volume flow rate and differential pressure control in ventilation and air conditioning systems
  • For low-leakage shut-off of ducts and openings in walls and ceiling slabs
  • 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

Classification
Air leakage with closed multileaf damper according to EN 1751:Test pressure up to 2000 Pa
  • Up to B = 599 mm, class 1
  • From B = 600 mm, class 2

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

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 multileaf dampers made of galvanised sheet steel with brass or stainless steel bearing bushes (JZ-...-M, JZ-...-E)V: Reinforced blades available as 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 welded casing (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 horizontal arms
  • Blade shafts, Ø12 mm, with notch to indicate the damper blade position (not for ZS99)
  • With drive spindle as an attachment: For the position of the spindle, see 'Dimensions and weight'
  • With actuator as an attachment: The actuator is always attached to the second blade from the top
  • Travel stop (angle section) ensures tight closure of the top and bottom blades
  • Blade tip seals
  • The construction and selection of materials comply with the criteria stipulated in European 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
  • Blade shafts, drive arm and external linkage made of galvanised steel
  • Blade tip seals made of PP/PTV plastic
  • 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 air leakage with closed multileaf damper (from B = 600 mm)

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


Disclosure of Chemicals
  • RoHS EU Directive 2011/65/EU (RoHS)
    • This product or single variants comply with EU Directive 2011/65/EU (RoHS) on the restriction of the use of certain hazardous substances in electrical and electronic equipment. For more information, please refer to our Environmental Product Declarations.
  • REACH 1907/2006 (EC Regulation REACH)
    • This product or single variants comply with the provisions of EC Regulation No. 1907/2006, also known as REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals). For more information, please refer to our Environmental Product Declarations.

Technical information

  • FUNCTION
  • TECHNICAL DATA
  • SPECIFICATION TEXT
  • ORDER CODE
Schematic illustration of JZ-HL Schematic-illustration-JZ-HL
① Casing
② Opposed blades
③ Blade tip seal
④ Travel stop (angle section with seal)
⑤ Actuator
⑥ Transverse link
⑦ External linkage
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

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design program.

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

  • 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
  • Blade shafts, drive arm and external linkage made of galvanised steel
  • Blade tip seals made of PP/PTV plastic
  • 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 multileaf dampers made of galvanised sheet steel with brass or stainless steel bearing bushes (JZ-...-M, JZ-...-E)V:
Reinforced blades available as from width 800 mm

Technical data

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

Sizing data

  • qv (m³/h)
  • Δpt [Pa]
Air-regenerated noise
  • LPA [dB(A)]
JZ-HL–G–M––L/1000 × 1005/ER/Z64/NC/P1 - RAL 9010
||||||||||
12345678910

1 Type
JZ-HL airtight multileaf damper made of galvanised steel, closed-blade air leakage in accordance with EN 1751, Class 1 - 2

2 Air duct connection
No entry: corner holes on both sides
G Flange holes on both sides (no corner holes)

3 Bearing bushes
No entry: plastic bearing bushes
M Brass bearing bushes
E Stainless steel bearing bushes

4 Construction of blades
No entry: Standard blades
V reinforced blades (only with bearing bushes M and E in combination with width from 800)

5 Operating side
No entry: right
L left

6 Nominal size [mm]
Specify width × height1

7 Installation subframe
No entry: Without installation subframe
ER with installation subframe (air duct connection G only)

8 Attachments
No entry: without attachment
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

9 Damper blade safety position
Only with spring return actuators or pneumatic actuators
NO Open when de‑energised/depressurised (Normally Open)
NC Closed when de‑energised/depressurised (Normally Closed)

10 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
¹ Variants split in width and/or height are available:
Width > 2000: split in width
Height > 1995: split in height

Order example: JZ-HL-G-M-L/1000×1005/ER/Z64/NC/P1-RAL9010

TypeJZ-HL
Air duct connectionFlange holes on both sides
Bearing bushesBrass bearing bushes
Operating sideleft
Nominal size [mm]Width 1000, height 1005
Installation subframewith installation subframe
Attachmentspneumatic actuator Z64
Damper blade positionde-energised/de-pressurised CLOSED (Normally Closed)
Surfacepowder-coated, RAL 9010 (pure white)

Downloads

product information

  • Product data sheet JZ-HL

    JZ-HL_PD_2026_06_19_DE_en Product data sheet 640 KB pdf

certificates

  • Declaration of incorporation Type JZ-HL

    JZ-HL_CE_DoI_2023_12_01_DE_en Declaration of incorporation 660 KB pdf

  • EU declaration of conformity

    CE_2020_06_JZ-Ex_DE_en Declaration of conformity 120 KB pdf

  • Environmental product declaration JZ-HL

    JZ-HL_EPD_2024_11_DE_en Environmental product declaration 1,2 MB pdf

operation manuals

  • Installation manual JZ-* explosion-proof construction

    JZ-x-Ex_IM_A00000048935_V5_2023_11_GB_en Installation manual 1,1 MB pdf

  • Installation manual Serien JZ-x and WG-JZ 

    JZ-x_WG-JZ_IM_A00000044990_V6_2023_11_GB_en Installation manual 1,5 MB pdf
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