JZ | TROX GmbH

Multileaf damper, variant JZ-P-A2

Multileaf damper with actuator

Parallel blades

Opposed blades

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

Schematic illustration of JZ-S

① Casing

② Opposed blades

③ External linkage

④ Actuator

⑤ Transverse link

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

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

H	B
H	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
H	200	400	600	800	1000	1200	1400	1600	1800	2000
180	0.03	0.06	0.09	0.12	0.15	0.18	0.21	0.24	0.27	0.3
345	0.06	0.11	0.17	0.23	0.28	0.34	0.4	0.45	0.51	0.57
510	0.08	0.17	0.25	0.33	0.42	0.5	0.58	0.67	0.75	0.83
675	0.11	0.22	0.33	0.44	0.55	0.66	0.77	0.88	0.99	1.1
840	0.14	0.27	0.41	0.55	0.69	0.82	0.96	1.1	1.23	1.37
1005	0.16	0.33	0.49	0.66	0.82	0.98	1.15	1.31	1.47	1.64
1170	0.19	0.38	0.57	0.76	0.95	1.14	1.33	1.52	1.72	1.91
1335	0.22	0.43	0.65	0.87	1.09	1.3	1.52	1.74	1.96	2.17
1500	0.24	0.49	0.73	0.98	1.22	1.47	1.71	1.95	2.2	2.44
1665	0.27	0.54	0.81	1.08	1.36	1.63	1.9	2.17	2.44	2.71
1830	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 permitted differential pressure Δp_{max t} [Pa] in the case of closed multileaf damper

Construction	B
Construction	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 (-M-V, -E-V)	3500	3000	2700	2500	2300	2100	2000

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

Δp_t [Pa]	Area B × H [m²]
Δp_t [Pa]	0.14	0.2	0.4	0.6	0.8	1.2	2	4
100	57	58	61	63	64	66	68	71
200	63	65	68	69	71	72	75	77
500	71	72	76	78	79	81	83	84
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 L_WA [Pa] in the case of closed multileaf damper

Δp_t [Pa]	Area B × H [m²]
Δp_t [Pa]	0.14	0.2	0.4	0.6	0.8	1.2	2	4
100	57	58	61	63	64	64	68	71
200	63	65	68	69	71	71	75	78
500	71	72	76	78	79	79	85	87
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°
	Δp_t [Pa]	L_WA [dB(A)]	Δp_t [Pa]	L_WA [dB(A)]	Δp_t [Pa]	L_WA [dB(A)]	Δp_t [Pa]	L_WA [dB(A)]	Δp_t [Pa]	L_WA [dB(A)]
0.5	<5	<30	<5	<30	<5	<30	22	44	255	67
1	<5	<30	<5	<30	8	38	85	59	1010	82
2	<5	31	<5	35	28	53	335	74	>2000	>90
4	<5	46	10	50	110	68	1395	89	>2000	>90
6	<5	55	22	59	250	77	>2000	>90	>2000	>90
8	8	61	40	65	440	83	>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°
	Δp_t [Pa]	L_WA [dB(A)]	Δp_t [Pa]	L_WA [dB(A)]	Δp_t [Pa]	L_WA [dB(A)]	Δp_t [Pa]	L_WA [dB(A)]	Δp_t [Pa]	L_WA [dB(A)]
0.5	<5	<30	<5	<30	<5	<30	<5	<30	12	42
1	<5	<30	<5	<30	<5	<30	12	40	45	60
2	<5	<30	<5	30	10	41	45	57	185	77
4	<5	41	6	48	40	58	170	75	750	>90
6	<5	51	14	58	85	69	385	85	1685	>90
8	<5	58	25	65	150	76	685	>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

q_v (m³/h)
Δp_t [Pa]

Air-regenerated noise

L_PA[dB(A)]

Life cycle assessment
A life cycle assessment is available for the product series in form of an Environmental Product Declaration (EPD) that has been checked and published by a programme holder.

–

1000 × 1005

Z64

P1 - RAL 9010

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

Function	Opposed
Material	Galvanised steel
Duct connection	Flange holes on both sides
Bearings	Brass bearings
Construction of blades	Reinforced blades
Operating side	Left
Nominal size	800 × 510 mm
Installation subframe	With
Attachments	Actuator, 10 Nm, 230 V AC, 3-point
User interface	Standard construction

Variants

Multileaf damper, variant JZ-S

Multileaf damper with quadrant stay

Downloads

product information

Product data sheet Type JZ

JZ_PD_2024_02_12_DE_en Product data sheet 6,2 MB pdf

certificates

Certificate concerning statistical leakage tests

LC_v1_2024_10_DE_en Certificate 660 KB pdf
Conformity Statement Type JZ-Ex

JZ-Ex_ATEX_2023_11_DE_en Conformity Statement 720 KB pdf
Declaration of incorporation Type JZ

JZ_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

JZ_EPD_2024_03_DE_en Environmental Product Declarations 460 KB 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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JZ

For shutting off the airflow in air conditioning systems

Allgemeine Informationen

Technical information

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

Variants

Downloads

product information

Product data sheet Type JZ

certificates

Certificate concerning statistical leakage tests

Conformity Statement Type JZ-Ex

Declaration of incorporation Type JZ

EU declaration of conformity

Environmental Product Declaration JZ

operation manuals

Installation manual JZ-* explosion-proof construction

Installation manual Serien JZ-x and WG-JZ

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