JZ-HL_img_01psd.png
JZ-HL_img_02psd.png

Opposed blades

JZ-HL_img_01psd.png
JZ-HL_img_02psd.png

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 features

  • 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 steel or stainless steel multileaf dampers with brass or stainless steel bearings (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)


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

  • 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

Technical information

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

  • Function
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE
Schematic illustration of JZ-HL JZ-HL_gc_01ai.png

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 sizes200 × 180 – 2000 × 1995 mm
Operating temperature0 to 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]

HB
200400600800100012001400160018002000
180 – 3440.030.060.090.120.150.180.210.240.270.3
345 – 5090.060.110.170.230.280.340.40.450.510.57
510 – 6740.080.170.250.330.420.50.580.670.750.83
675 – 8390.110.220.330.440.550.660.770.880.991.1
840 – 10040.140.270.410.550.690.820.961.11.231.37
1005 – 11690.160.330.490.660.820.981.151.311.471.64
1170 – 13340.190.380.570.760.951.141.331.521.721.91
1335 – 14990.220.430.650.871.091.31.521.741.962.17
1500 – 16640.240.490.730.981.221.471.711.952.22.44
1665 – 18290.270.540.811.081.361.631.92.172.442.71
1830 – 19940.30.60.891.191.491.792.082.382.682.98
19950.320.650.971.31.621.952.272.62.923.25

Intermediate sizes: Interpolate values between widths.



 

Maximum permissible static differential pressure [Δpmax t] 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 (-MV, -E-V)3500300027002500230021002000


 

 

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

1004345485051535558
2005153565859616366
5006263666869>70>70>70
100069>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

Installation type

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

v [m/s]Damper blade position α
OPEN20°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<57.5223425063
1<5<30<5<308268553100083
2<5<30<5<30304634573>2000>90
4<5411044120651385>90>2000>90
6<552245627077>2000>90>2000>90
81060426448085>2000>90>2000>90


 


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 features

  • Aerofoil blades

  • Low-maintenance, robust construction

  • No parts with silicone

  • Available in standard sizes and many intermediate sizes



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

  • 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 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-HLGEVL / 1000 × 1005 / ER / Z64 / NC / P1 – RAL …
||||||||||
12345678910
1 Type
JZ-HL Low-leakage multileaf damper, closed blade air leakage according to EN 1751, classes 1 – 2
 
2 Duct connection
No entry required: Corner holes on both sides
G Flange holes on both sides (no corner holes)
 
3 Bearings
No entry required: Plastic bearings
M Brass bearings
E Stainless steel bearings
 
4 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
 
5 Operating side
No entry required: On the right
L Left
 
6 Nominal size [mm]
B × H
B > 2000 = width subdivided
H > 1995 = height subdivided
 
7 Installation subframe
No entry required: None
ER With (only for duct connection G)
 
8 Attachments
No entry required: None
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
 
9 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
 
10 Surface
No entry required: Standard construction
P1 Powder-coated, specify RAL CLASSIC colour
 
Gloss level
RAL 9010 50 %
RAL 9006 30 %
All other RAL colours 70 %Order example: JZ-HL–G–M–V–L/1200×675/ER/ZF06/NC
Duct connectionFlange holes on both sides
BearingsBrass bearings
Construction of bladesReinforced blades
Operating sideLeft side
Nominal size1200 × 675 mm
Installation subframeWith
AttachmentsSpring return actuator, 20 Nm, 24 V AC/DC
Damper blade positionPower off to CLOSE
User interfaceStandard construction

Dimensions

  • Dimensions

JZ, JZ-HL, standard sizes

H

No. of blades

Spindle position

X

Damper blade

1801901
3452901
5103901
67542552
84054203
100564203
117075854
133585854
150097505
1665107505
1830119156
1995129156





JZ, JZ-HL, intermediate sizes

H

No. of blades

Spindle position

Y

X

Damper blade

183 – 34319011.5 – 81.5
348 – 50829011.5 – 81.5
513 – 67339011.5 – 81.5
678 – 838425521.5 – 81.5
843 – 1003542031.5 – 81.5
1008 – 1168642031.5 – 81.5
1173 – 1333758541.5 – 81.5
1338 – 1498858541.5 – 81.5
1503 – 1663975051.5 – 81.5
1668 – 18281075051.5 – 81.5
1833 – 19931191561.5 – 81.5





JZ, JZ-LL, JZ-HL, weight

HB
200400600800
1804689
345681012
5107101316
67510131620
84011151923
100511172227
117013192531
133515222835
150016233037
166517253341
183018273544
199519293847

Attachments, Product details, Installation details

  • ATTACHMENTS, PRODUCT DETAILS, INSTALLATION DETAILS


Attachments

Quadrant stays and limit switches

Order code detailDescriptionLimit switchFunction
Z04Hold open device
Z05Hold open device1Damper blade position CLOSED
Z06Hold open device1Damper blade position OPEN
Z07Hold open device2Damper blade positions CLOSED and OPEN




Open/close actuators

Order code detailDescriptionFunctionSupply voltageTorqueAuxiliary switch
Z12SM230A1-wire-control
2-wire-control (3-point)
100 – 240 V AC20 Nm
Z13GM230A1-wire-control
–2-wire-control (OPEN-CLOSE)
100 – 240 V AC40 Nm
Z14SM24A1-wire-control
2-wire-control (3-point)
24 V AC/DC20 Nm
Z15GM24A1-wire-control
–2-wire-control (OPEN-CLOSE)
24 V AC/DC40 Nm
Z16SM230A1-wire-control
2-wire-control (3-point)
100 – 240 V AC20 NmS2A
Z17GM230A1-wire-control
2-wire-control (3-point)
100 – 240 V AC40 NmS2A
Z18SM24A1-wire-control
2-wire-control (3-point)
24 V AC/DC20 NmS2A
Z19GM24A1-wire-control
2-wire-control (3-point)
24 V AC/DC40 NmS2A
Z43NM230A1-wire-control
2-wire-control (3-point)
100 – 240 V AC10 Nm
Z45NM24A1-wire-control
2-wire-control (3-point)
24 V AC/DC10 Nm
Z47NM230A1-wire-control
2-wire-control (3-point)
100 – 240 V AC10 NmS2A
Z49NM24A1-wire-control
2-wire-control (3-point)
24 V AC/DC10 NmS2A

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




Open/close actuators, fast-running

Order code detailDescriptionFunctionSupply voltageTorqueAuxiliary switch
ZS21SMQ24A1-wire-control24 V AC/DC16 Nm
ZS22SMQ24A1-wire-control24 V AC/DC16 NmS2A

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



 

Open/close actuators, spring return

Order code detailDescriptionFunctionSupply voltageTorqueAuxiliary switch
ZF01NF24ASupply voltage on/off24 V AC/DC10 Nm
ZF02NFASupply voltage on/off24 – 240 V AC

24 – 125 V DC
10 Nm
ZF03NF24A-S2Supply voltage on/off24 V AC/DC10 Nmintegrated
ZF04NFA-S2Supply voltage on/off24 – 240 V AC

24 – 125 V DC
10 Nmintegrated
ZF06SF24ASupply voltage on/off24 V AC/DC20 Nm
ZF07SFASupply voltage on/off24 – 240 V AC

24 – 125 V DC
20 Nm
ZF08SF24A-S2Supply voltage on/off24 V AC/DC20 Nmintegrated
ZF09SFA-S2Supply voltage on/off24 – 240 V AC

24 – 125 V DC
20 Nmintegrated
ZF11EF24ASupply voltage on/off24 V AC/DC30 Nm
ZF12EF230ASupply voltage on/off100 – 240 V AC30 Nm
ZF13EF24A-S2Supply voltage on/off24 V AC/DC30 Nmintegrated
ZF14EF230A-S2Supply voltage on/off100 – 240 V AC30 Nmintegrated

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




Modulating actuators

Order code detailDescriptionFunctionSupply voltageTorqueAuxiliary switch
Z20SM24A-SR2 – 10 V DC24 V AC/DC20 Nm
Z21GM24A-SR2 – 10 V DC24 V AC/DC40 Nm
Z51NM24A-SR2 – 10 V DC24 V AC/DC10 Nm

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



Modulating actuators, spring return

Order code detailDescriptionFunctionSupply voltageTorqueAuxiliary switch
ZF05NF24A-SR2 – 10 V DC24 V AC/DC10 Nm
ZF10SF24A-SR2 – 10 V DC24 V AC/DC20 Nm
ZF15EF24A-SR2 – 10 V DC24 V AC/DC30 Nm

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


 

Double acting pneumatic actuators, including explosion-proof actuators

Order code detailDescriptionDamper blade safety functionOperating pressureTorque at 6 barLimit switchSolenoid valve


(1)




(2)


Z60Z60 EXDR0301.2 – 6 bar35 Nm
Z61Z61 EXDR030power off to close/open1.2 – 6 bar35 Nm24 V DC
Z62Z62 EXDR030power off to close/open1.2 – 6 bar35 Nm230 V AC
Z63Z63 EXDR0301.2 – 6 bar35 Nm2
Z64Z64 EXDR030power off to close/open1.2 – 6 bar35 Nm224 V DC
Z65Z65 EXDR030power off to close/open1.2 – 6 bar35 Nm2230 V AC
Z66Z66 EXDR0601.2 – 6 bar70 Nm
Z67Z67 EXDR060power off to close/open1.2 – 6 bar70 Nm24 V DC
Z68Z68 EXDR060power off to close/open1.2 – 6 bar70 Nm230 V AC
Z69Z69 EXDR0601.2 – 6 bar70 Nm2
Z70Z70 EXDR060power off to close/open1.2 – 6 bar70 Nm224 V DC
Z71Z71 EXDR060power off to close/open1.2 – 6 bar70 Nm2230 V AC

(1) Standard
(2) Explosion-proof (only with brass or stainless steel bearings)
Minimum torque, which depends on the 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 detailDescriptionDamper blade safety functionOperating pressureTorque at 6 barLimit switchSolenoid valve


(1)




(2)


Z72Z72 EXSC060
SO060
pressure off to close/open6 bar30 Nm
Z73Z73 EXSC060
SO060
power off and pressure off to close/open6 bar30 Nm24 V DC
Z74Z74 EXSC060
SO060
power off and pressure off to close/open6 bar30 Nm230 V AC
Z75Z75 EXSC060
SO060
pressure off to close/open6 bar30 Nm2
Z76Z76 EXSC060
SO060
power off and pressure off to close/open6 bar30 Nm224 V DC
Z77Z77 EXSC060

SO060
power off and pressure off to close/open6 bar30 Nm2230 V AC

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



Explosion-proof open/close actuators, spring return actuators

Order code detailDescriptionFunctionSupply voltageTorqueAuxiliary switch
Z1EXExMax15-SF2-wire-control (3-point)24 – 240 V AC/DC15 Nmintegrated
Z3EXExMax30-SF2-wire-control (3-point)24 – 240 V AC/DC30 Nmintegrated

Only with brass or stainless steel bearings
Z1EX: Only for nominal sizes with a minimum torque up to 15 Nm.






Product details

  • Constructions with flange holes (-G) do not have corner holes
  • Drive spindles (special accessory) upon request



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

BNumber of holes n
200 – 287

0

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

H

Number of holes n

180 – 211

0

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 A [mm]

Drive shaftJZ-LLJZ-LL-A2JZ-HL

Standard spindle

302630
ZS99 – extended spindle250180250
ZS991 – square shaft 9 mm373737
ZS992 – square shaft 10 mm7060






Installation details

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 [mm]

B₁B
25501200
29501400
33501600
37501800
41502000

Downloads

product information

certificates

operation manuals

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For general question regarding products or services you can also call:
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