JZ-LL | TROX Austria GmbH
JZ-LL_img_13psd.png
JZ-LL_img_20psd.png

Opposed blades

JZ-LL_img_07psd.png

Closed cell side seals

JZ-LL_img_05psd.png

Encased gears

JZ-LL_img_13psd.png
JZ-LL_img_20psd.png
JZ-LL_img_07psd.png
JZ-LL_img_05psd.png

JZ-LL

For extremely low-leakage shut-off in ventilation and 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 multileaf damper 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

General information

Application

  • Stainless steel and powder-coated construction



Special features

  • 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 – 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-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


Constructions

  • 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: Quadrant stays to adjust the damper blades (infinite adjustment) and for capturing the end positions

  • Open/close actuators: Actuators for opening and closing multileaf dampers

  • Modulating actuators: Actuators for infinite blade 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 galvanised steel 1.25 mm, stainless steel A2 = 1.2 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

  • Damper blade shafts, Ø12 mm, with notch to indicate the damper 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 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 and side 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 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 multileaf damper air leakage

  • Multileaf damper sizes from B = 600 mm meet the increased requirements of DIN 1946, Part 4, with regard to the maximum closed multileaf damper 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 multileaf damper 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-LL, JZ-LL-A2
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

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 closed multileaf damper air leakage.


 

The torque for actuating multileaf dampers must be dimensioned so 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 temperature0 to 100 °C


 


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

HB
200400600800100012001400160018002000
18010101010101010101010
34510101010101010101010
51010101010101010101010
67510101010101015151515
84010101010151515151515
100510101515151515152020
117015151515151520203030
133515151515202030303030
150015151520203030303030
166520202020303030303030
183020202020303030303030
199520202020303030303030


 

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 static differential pressure for a closed multileaf damper Δpt max [Pa]

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) 33500300027002500230021002000


 


JZ-LL, JZ-LL-A2, sound power level for a closed multileaf damper LWA [dB(a)]



Δp[Pa]


Area B × H [m²]
0.140.20.40.60.81.224
100<3535383941424548
2004142454748505356
5005152555758606265
100058606364666870>70
150063646769>70>70>70>70
2000656770>70>70>70>70>70

Installation type
A = Ducts on both sides
B = Air discharge
C = Air intake
D = Air transfer

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

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

7.5

22

34

250

63

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

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 to EN 1751, class 4 (B ≤ 600 mm, class 3)
Casing air leakage 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

  • 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


Constructions

  • 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-LLA2GEL / 1000 × 1005 / ER / Z64 / NC / P1 – RAL …
|||||||||||
1234567891011
1 Type
JZ-LL Low-leakage multileaf damper, closed multileaf damper air leakage to EN 1751, class 3 – 4
 
2 Material
No entry required: Galvanised steel
A2 Stainless steel
 
3 Duct connection
No entry required: Corner holes on both sides
G Flange holes on both sides (no corner holes)
 
4 Bearings
No entry required: Plastic bearings
M Brass bearings
E Stainless steel bearings
 
5 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
 
6 Operating side
No entry required: On the right
L Left
 
7 Nominal size [mm]
B × H
B > 2000 = width subdivided
H > 1995 = height subdivided
 
8 Installation subframe
No entry required: None
ER With (only for duct connection G)
 
9 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
 
10 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
 
11 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-LL–G–L/1200×675/ER/ZF06/NC
MaterialGalvanised steel
Duct connectionFlange holes on both sides
BearingsPlastic bearings
Construction of bladesStandard
Operating sideLeft
Nominal size1200 × 675 mm
Installation subframeWith
AttachmentsSpring return actuator, 20 Nm, 24 V AC/DC
Damper blade positionPower off to CLOSE
User interfaceStandard construction

Variants, Dimensions 

  • VARIANTS
  • DIMENSIONS

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 or stainless steel

  • Blade shafts, drive arm and external linkage made of galvanised steel or stainless 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 and blades made of galvanised sheet steel or stainless steel

  • Blade shafts, drive arm and external linkage made of galvanised steel or stainless 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, standard sizes

H

No. of blades

Spindle position

X

Damper blade

1801901
34522552
51032552
67542552
84052552
100562552
117072552
133582552
150092552
1665102552
1830112552
1995122552




JZ-LL, intermediate sizes

H

No. of blades

Spindle position

Y [mm]

X

Damper blade

Y

183 – 34319011.5 – 81.5
348 – 508225511.5 – 81.5
513 – 673325511.5 – 81.5
678 – 838425521.5 – 81.5
843 – 1003525531.5 – 81.5
1008 – 1168625531.5 – 81.5
1173 – 1333725541.5 – 81.5
1338 – 1498825541.5 – 81.5
1503 – 1663925551.5 – 81.5
1668 – 18281025551.5 – 81.5
1833 – 19931125561.5 – 81.5



JZ, JZ-LL, JZ-HL, weights [kg]

HB
200400600800100012001400160018002000
1804689111314161819
345681012151719212426
5107101316192225273033
67510131620232730333740
84011151923283237414650
100511172227323843485359
117013192531374349556167
133515222835414855616874
150016233037445159667380
166517253341495765728088
183018273544526169788695
1995192938475666758494103

Materials and surfaces, Attachments, Product details, Installation details

  • MATERIALS AND SURFACES, ATTACHMENTS, PRODUCT DETAILS, INSTALLATION DETAILS




Materials and surfaces

Material

Order code detailPartMaterial
EnclosureGalvanised sheet steel
BladesGalvanised sheet steel
ShaftsGalvanised steel
Drive armGalvanised steel
LinkageGalvanised steel
Long-side blade tip sealsPlastic PP/PTV
Front blade side sealsClosed cell PE foamed plastic
BearingsPlastic
A2EnclosureStainless steel, material no. 1.4301
A2BladesStainless steel, material no. 1.4301
A2ShaftsStainless steel, material no. 1.4305
A2Drive armStainless steel, material no. 1.4301
ELinkageStainless steel
MLinkageBrass


Surfaces

Order code detailPartMaterial
EnclosureUntreated
P1-RAL ...BladesPowder-coated, colour RAL ... CLASSIC
PS-DB ...BladesPowder-coated, colour DB ...

 



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

  • 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

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 shaftMultileaf damper
JZ-LLJZ-LL-A2JZ-HL
① Standard302630
② Extended250180250
③ Square 9 mm373737
④ Square 10 mm7060

The extended spindle ZS99, ZS991, ZS992 is designed in duplicate for blade torque > 10 Nm and mounted on blades 2 and 4 (only for type JZ-LL (galvanised steel)).



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



Height subdivided, height

H₁H
20861005
24161170
27461335
30761500
34061665
37361830
40661995

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