JZ-HL

Opposed blades

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

Information technique

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

Schematic illustration of 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 to 100 °C

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 – 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 [Δp_{max t}] 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 (-MV, -E-V)	3500	3000	2700	2500	2300	2100	2000

Sound power level for a closed multileaf damper L_WA [dB(A)]

Δp_t	Area B × H [m²]
Δp_t	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

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 L_WA 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°
	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	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

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

q_v (m³/h)
Δp_t [Pa]

Air-regenerated noise

L_PA [dB(A)]

JZ-HL

–

1000 × 1005

Z64

P1 – RAL …

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 connection	Flange holes on both sides
Bearings	Brass bearings
Construction of blades	Reinforced blades
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
User interface	Standard construction

Dimensions

Standard sizes

Illustration shows operating side on the right

JZ, JZ-HL, standard sizes

H	No. of blades	Spindle position
H	No. of blades	X	Damper blade
180	1	90	1
345	2	90	1
510	3	90	1
675	4	255	2
840	5	420	3
1005	6	420	3
1170	7	585	4
1335	8	585	4
1500	9	750	5
1665	10	750	5
1830	11	915	6
1995	12	915	6

JZ, JZ-HL, intermediate sizes

H	No. of blades	Spindle position		Y
H	No. of blades	X	Damper blade	Y
183 – 343	1	90	1	1.5 – 81.5
348 – 508	2	90	1	1.5 – 81.5
513 – 673	3	90	1	1.5 – 81.5
678 – 838	4	255	2	1.5 – 81.5
843 – 1003	5	420	3	1.5 – 81.5
1008 – 1168	6	420	3	1.5 – 81.5
1173 – 1333	7	585	4	1.5 – 81.5
1338 – 1498	8	585	4	1.5 – 81.5
1503 – 1663	9	750	5	1.5 – 81.5
1668 – 1828	10	750	5	1.5 – 81.5
1833 – 1993	11	915	6	1.5 – 81.5

JZ, JZ-LL, JZ-HL, weight

H	B
H	200	400	600	800
180	4	6	8	9
345	6	8	10	12
510	7	10	13	16
675	10	13	16	20
840	11	15	19	23
1005	11	17	22	27
1170	13	19	25	31
1335	15	22	28	35
1500	16	23	30	37
1665	17	25	33	41
1830	18	27	35	44
1995	19	29	38	47

Attachments, Product details, Installation details

Multileaf dampers made of steel or stainless steel, corner holes

Attachments

Quadrant stays and limit switches

Order code detail	Description	Limit switch	Function
Z04	Hold open device	–
Z05	Hold open device	1	Damper blade position CLOSED
Z06	Hold open device	1	Damper blade position OPEN
Z07	Hold open device	2	Damper blade positions CLOSED and OPEN

Open/close actuators

Order code detail	Description	Function	Supply voltage	Torque	Auxiliary 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 detail	Description	Function	Supply voltage	Torque	Auxiliary 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 detail	Description	Function	Supply voltage	Torque	Auxiliary 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 detail	Description	Function	Supply voltage	Torque	Auxiliary 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 detail	Description	Function	Supply voltage	Torque	Auxiliary 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 detail		Description	Damper blade safety function	Operating pressure	Torque at 6 bar	Limit switch	Solenoid valve
(1)	(2)	Description	Damper blade safety function	Operating pressure	Torque at 6 bar	Limit switch	Solenoid valve
Z60	Z60 EX	DR030	–	1.2 – 6 bar	35 Nm	–
Z61	Z61 EX	DR030	power off to close/open	1.2 – 6 bar	35 Nm	–	24 V DC
Z62	Z62 EX	DR030	power off to close/open	1.2 – 6 bar	35 Nm	–	230 V AC
Z63	Z63 EX	DR030	–	1.2 – 6 bar	35 Nm	2
Z64	Z64 EX	DR030	power off to close/open	1.2 – 6 bar	35 Nm	2	24 V DC
Z65	Z65 EX	DR030	power off to close/open	1.2 – 6 bar	35 Nm	2	230 V AC
Z66	Z66 EX	DR060	–	1.2 – 6 bar	70 Nm	–
Z67	Z67 EX	DR060	power off to close/open	1.2 – 6 bar	70 Nm	–	24 V DC
Z68	Z68 EX	DR060	power off to close/open	1.2 – 6 bar	70 Nm	–	230 V AC
Z69	Z69 EX	DR060	–	1.2 – 6 bar	70 Nm	2
Z70	Z70 EX	DR060	power off to close/open	1.2 – 6 bar	70 Nm	2	24 V DC
Z71	Z71 EX	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, 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 detail		Description	Damper blade safety function	Operating pressure	Torque at 6 bar	Limit switch	Solenoid valve
(1)	(2)	Description	Damper blade safety function	Operating pressure	Torque at 6 bar	Limit switch	Solenoid valve
Z72	Z72 EX	SC060 SO060	pressure off to close/open	6 bar	30 Nm	–	–
Z73	Z73 EX	SC060 SO060	power off and pressure off to close/open	6 bar	30 Nm	–	24 V DC
Z74	Z74 EX	SC060 SO060	power off and pressure off to close/open	6 bar	30 Nm	–	230 V AC
Z75	Z75 EX	SC060 SO060	pressure off to close/open	6 bar	30 Nm	2	–
Z76	Z76 EX	SC060 SO060	power off and pressure off to close/open	6 bar	30 Nm	2	24 V DC
Z77	Z77 EX	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 detail	Description	Function	Supply voltage	Torque	Auxiliary 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.

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

B	Number 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 shaft	JZ-LL	JZ-LL-A2	JZ-HL
Standard spindle	30	26	30
ZS99 – extended spindle	250	180	250
ZS991 – square shaft 9 mm	37	37	37
ZS992 – square shaft 10 mm	70	–	60

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]

B₁	B
2550	1200
2950	1400
3350	1600
3750	1800
4150	2000

Téléchargements

Information produit

Impression du site JZ-HL
Product data sheet JZ-HL

JZ-HL_PD_2022_03_24_DE_en Product data sheet 690 KB pdf

Certificats

Classe d'étanchéité des composants de ventilation TROX

Classe d'étanchéité_2021_05_31_DE_fr Certificat 670 KB pdf
Déclaration de conformité UE

CE_2020_06_JZ-Ex_DE_fr Déclaration de conformité 120 KB pdf

Manuels d'utilisation

Manuel d'installation JZ, JZ-AL, JZ-LL, JZ-HL, JZ-HL-AL, JZ-LL-AL, WG-JZ

JZ-x_WG-JZ_IM_A00000044990_V5_2022_10_FR_fr Manuel d'installation 490 KB pdf

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JZ-HL

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

General information

Information technique

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

Dimensions

Attachments, Product details, Installation details

Attachments

Product details

Installation details

Téléchargements

Information produit

Impression du site JZ-HL

Product data sheet JZ-HL

Certificats

Classe d'étanchéité des composants de ventilation TROX

Déclaration de conformité UE

Manuels d'utilisation

Manuel d'installation JZ, JZ-AL, JZ-LL, JZ-HL, JZ-HL-AL, JZ-LL-AL, WG-JZ

TROX SERVICES

NÉCESSAIRE D’UN POINT DE VUE TECHNIQUE

STATISTIQUES ET ANALYSE DE SITE WEB

COMMODITÉ ET PERSONNALISATION

POUR LA MEILLEURE EXPÉRIENCE TROX POSSIBLE