JFZ

JFZ with actuator

For the ventilation of and smoke extract from underground transport systems

Tunnel dampers are safety components specially designed for underground transport systems and meet special requirements

Certified construction and manufacturing according to ISO 9001
Temperature resistance up to 400 °C over 120 min
Construction: Galvanised steel
Side seals made of sprung stainless steel compensate for the longitudinal expansion of the blades at high temperatures
Parallel or opposed action blades
Operation via electric actuators, including heat-insulating protective enclosure (optional)
Casing air leakage to EN 1751, class C
Low differential pressure and sound power level
Installation orientation is independent of the airflow direction

Optional equipment and accessories

Installation subframe for assembly
Support structure for installation of multiple dampers into walls

General information

Application

Specially designed for underground transport systems
For opening and closing smoke extract ducts
Component of ventilation and smoke extract systems in underground transport systems
Can also be used as shut-off dampers for fans

Classification

Test report no. 15/11160-2708 – Applus (Spain)
Casing air leakage to EN 1751, class C
Test report no. 210006732-02 – MPA NRW (Germany)
Long-term testing: 10.000 open/close cycles

Constructions

Standard sizes

B = 400 – 2000 mm
H = 345 – 1995 mm

Intermediate sizes

B (width) and H (height) dimensions available in each millimetre increment
Large dimensions can be implemented using units consisting of several dampers and a support structure

Optional equipment

Installation subframe
Support structure
Terminal plates

Accessories

Actuator
Encasing
Hold open device

Special features

Low differential pressure and sound power level
Aerofoil blades
Low maintenance construction
No parts with silicone
Closed blade air leakage at a differential pressure of 40 Pa = 200 m³/h per m²
Remote control with actuator (optional)

Parts and characteristics

Frame
Blade
Actuator
External linkage
Travel stop (angle section), side B
Side seal, side H
Electric open/close actuator or spring return actuator including limit switches

Construction features

Rectangular welded casing, material thickness 1.25 mm
Blades, material thickness 1 mm, counter-rotating or parallel coupled
Flanges on both sides, suitable for duct connection, with flange holes
Arrangement of the actuator on the second blade (independent of size)
External linkage, robust and durable, consisting of the coupling rod and horizontal arms
Damper blade shafts, Ø12 mm, with a notch for marking the damper blade position
The tunnel damper is remotely operated via an actuator, which is additionally protected by a heat-insulating enclosure depending on the application
Side seals between the regular blades and the frame
Travel stop (angle section) ensures tight closure of the top and bottom blades

Materials and surfaces

Casing, blades and travel stop (angle section) made of formed galvanised sheet steel; flanges on both sides with corner holes
Blade shafts, drive arm and external linkage made of galvanised steel
Side seal made of stainless steel
Brass bearings

Installation and commissioning

Installation position is independent of the airflow direction
With horizontal blades
Between ducts
Torsion-free installation
After installation the damper must remain accessible for inspection, cleaning and repair
Connected ducts must have an inspection access

Standards and guidelines

German 'Bau- und Prüfgrundsätze' [Principles of Construction and Testing], 2/84 edition
Maintenance standards DIN 31051 and EN 13305

Maintenance

Tunnel dampers must be maintained regularly and must be operational at all times
The maintenance standards DIN 31051 and EN 13305 must be observed in order to maintain and, if necessary, restore the desired condition.
Tunnel dampers must be serviced at least once a year
A maintenance report must be created; documents must be kept for reference
Maintenance-free as construction and materials are not subject to wear

Technical information

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

Schematic illustration of JFZ

① Casing

② Parallel blades

③ Enclosure

④ Actuator

⑤ Locating bracket

⑥ Side sealing plate

Tunnel dampers with a linkage have same or opposed action. An external linkage transfers the synchronous rotational movement from the drive arm to the individual blades. Even large dampers can be safely opened and closed with this type of linkage. Opposed action blades close at different angular velocities due to the transverse link. As a result, the closing properties are better and the air leakage is low when the damper is closed.

Free area [m²], standard sizes of tunnel damper JFZ

Intermediate sizes: Interpolate values between widths.

Nominal sizes	357 × 345 – 2000 × 1998 mm
Volume flow rate range	200 – 40,000 l/s or 720 – 143,640 m³/h
Maximum static differential pressure	Up to 3000 Pa
Operating temperature	-20 – 150 °C in normal operation, 400 °C, 120 min in the event of a fire

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.

Quick sizing, differential pressure and sound power level JFZ with damper blade position α

	OPEN/0°		20°		40°		60°		80°
v [m/s]	Δpst [Pa]	LWA [dB(A)]	Δpst [Pa]	LWA [dB(A)]	Δpst [Pa]	LWA [dB(A)]	Δpst [Pa]	LWA [dB(A)]	Δpst [Pa]	LWA [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
10	14	66	60	70	690	88	>2000	>90	>2000	>90

Sound power level with closed tunnel damper JFZ according to surface area B × H [m²].

	0,14	0,2	0,4	0,6	0,8	1,2	2	4
Δpst [Pa]	LWA [dB(A)]
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

Specification text

Specially designed safety component. Units consist of a casing, movable blades and linkage. Special side seals take up and compensate for the longitudinal expansion of the component at temperatures up to 400 °C for 120 minutes.

Special features

Low differential pressure and sound power level
Aerofoil blades
Low maintenance construction
No parts with silicone
Closed blade air leakage at a differential pressure of 40 Pa = 200 m³/h per m²
Remote control with actuator (optional)

Materials and surfaces

Casing, blades and travel stop (angle section) made of formed galvanised sheet steel; flanges on both sides with corner holes
Blade shafts, drive arm and external linkage made of galvanised steel
Side seal made of stainless steel
Brass bearings

Constructions

Standard sizes

B = 400 – 2000 mm
H = 345 – 1995 mm

Intermediate sizes

B (width) and H (height) dimensions available in each millimetre increment
Large dimensions can be implemented using units consisting of several dampers and a support structure

Optional equipment

Installation subframe
Support structure
Terminal plates

Technical data

Nominal sizes: 357 × 345 – 2000 × 1998 mm
Volume flow rate range: 200 to 40,000 l/s or 720 to 143,640 m³/h
Permissible static differential pressure: up to 3000 Pa
Operating temperature: -20 – 150 °C in normal operation, 400 °C 120 min in the event of a fire

Sizing data

q_v (m³/h)
Δ_pst [Pa]

Air-regenerated noise

L_PA [dB(A)]

JFZ

–

1000×1200

BE24

1 Type
JFZ Tunnel and industrial damper

2 Function
No entry required: Opposed action
S Opposed action
P Same action

3 Linkage-to-actuator connection
No entry required: Right
L Left

4 Nominal size [mm]
B × H

5 Attachments
No entry required: No actuator
B24 Belimo BE24-12 (24 V AC/DC, 40 Nm)
B230 Belimo BE230-12 (230 V AC, 40 Nm)
R230-58 Rotork RCEL006 (230 V AC, 58 Nm)
R400-58 Rotork RCEL006 (400 V AC, 58 Nm)
R230-88 Rotork RCEL009 (230 V AC, 88 Nm)
R400-88 Rotork RCEL009 (400 V AC, 88 Nm)
BC24 Bemard SQ4 (24 V AC, 50 Nm)
BC230 Bemard SQ4 (230 V AC, 50 Nm)
Spring return actuator (power off to close)
B24MF Belimo EF24A-S2 (24 V AC/DC, 30 Nm)
B230MF Belimo EF230A-S2 (230 V AC, 30 Nm)
SIF Schischek InMax-50-SF-S9 (24 – 240 V AC/DC, 50 Nm)

LD Hold open device

6 Temperature resistant enclosure
No entry required: None
P Enclosure (for Belimo or Schischek)
T Thermal bag (for Rotork and Bernard actuators)

7 Damper blade position, safety function only with spring return actuator
NO Power off to OPEN (standard)
NC Power off to CLOSE

Order example: JFZ-S-L/1000×1500/B24

Function	Opposed action
Linkage-to-actuator connection	Left
Nominal size B × H	1000 × 1500 mm
Attachments	Belimo BE24-12

Variants, Dimensions, Installation examples

JFZ with actuator and enclosure, operating side open

Attachments

OPEN/CLOSE actuator BE24-12-ST TR

JFZ with open/close actuator

Opening and closing of JFZ tunnel dampers
With integral limit switches for capturing the end positions
Operation of the tunnel damper with an OPEN/CLOSED actuator enables remote control and/or release by suitable release mechanisms
Ambient temperature in normal operation -30 – 50 °C
Two integral limit switches with volt-free contacts can indicate the damper blade position (OPEN and CLOSED)

Installation information

The electrical connecting cable is fed through the side wall of the actuator enclosure via a precisely fitting drilled hole.
A wire clamping bracket is required
For details on maintenance and inspection, refer to the installation and operating manual.

Open/close actuator BE230-12 TR

JFZ with open/close actuator

Opening and closing of JFZ tunnel dampers
With integral limit switches for capturing the end positions
Operation of the tunnel damper with an OPEN/CLOSED actuator enables remote control and/or release by suitable release mechanisms
Ambient temperature in normal operation -30 – 50 °C
Two integral limit switches with volt-free contacts can indicate the damper blade position (OPEN and CLOSED)

Installation information

The electrical connecting cable is fed through the side wall of the actuator enclosure via a precisely fitting drilled hole.
A wire clamping bracket is required
Notes regarding maintenance, inspection and servicing

Spring return actuator EF24A-S2

JFZ with spring return actuator

Operation of the tunnel damper with a spring return actuator enables remote control and/or release by suitable release mechanisms
Spring return actuator 24 V for open/closed switchover
Ambient temperature in normal operation -30 – 50°C
Two integral limit switches with volt-free contacts can indicate the damper blade position (OPEN and CLOSED)

Safety function

NO: Power off to OPEN
NC: Power off to CLOSE

Parts and characteristics

24 V AC/DC supply voltage
1-wire control (2-point)
Mechanical stops
Direction of action can be reversed
Crank handle for manual operation

Spring return actuator EF230A-S2

JFZ with spring return actuator

Operation of the tunnel damper with a spring return actuator enables remote control and/or release by suitable release mechanisms
Spring return actuator EF230A-S2
Spring return actuator 230 V for open/closed switchover
Ambient temperature in normal operation -30 – 50 °C
Two integral limit switches with volt-free contacts can indicate the damper blade position (OPEN and CLOSED)

Safety function

NO: Power off to OPEN
NC: Power off to CLOSE

Parts and characteristics

Supply voltage 100 to 240 V AC
1-wire control (2-point)
Mechanical stops
Direction of action can be reversed

JFZ, standard sizes, front view

Tunnel damper with spring return actuator, operating side right

Weights (including B24 actuator) according to width B [mm]

	400	600	800	1000	1200	1400	1600	1800	2000
H	kg
345	13	15	17	20	22	24	26	29	31
510	15	18	21	24	27	30	32	35	38
675	18	21	25	28	32	35	38	42	45
840	20	24	28	33	37	42	46	51	55
1005	22	27	32	37	43	48	53	58	64
1170	24	30	36	42	48	54	60	66	72
1335	27	33	40	46	53	60	66	73	79
1500	28	35	42	49	56	64	71	78	85
1665	30	38	46	54	62	70	77	85	93
1830	32	40	49	57	66	74	83	91	100
1995	34	43	52	61	71	80	89	99	108

JFZ, intermediate sizes

		Drive position
H	Number of blades	X [mm]	Blades	Y [mm]
348 – 508	2	255	2	1,5 – 81,5
1833 – 1993	11	255	2	1,5 – 81,5
1995	12	255	2	1.5
513 – 673	3	255	2	1,5 – 81,5
678 – 838	4	255	2	1,5 – 81,5
843 – 1003	5	255	2	1,5 – 81,5
1008 – 1168	6	255	2	1,5 – 81,5
1173 – 1333	7	255	2	1,5 – 81,5
1338 – 1498	8	255	2	1,5 – 81,5
1503 – 1663	9	255	2	1,5 – 81,5
1668 – 1828	10	255	2	1,5 – 81,5

Number of flange holes per side according to width B

B	n
400 – 537	2
538 – 787	3
788 – 1037	4
1038 – 1287	5
1288 – 1437	6
1538 – 1787	7
1788 – 2000	8

Wall mounting with wall bracket

① JFZ

② Clamping plate

③ Wall

DOWNLOADS

product information

Product data sheet JFZ

JFZ_PD_2022_02_18_DE_en Product data sheet 33 MB pdf

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JFZ

For the ventilation of and smoke extract from underground transport systems

General information

Technical information

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

Variants, Dimensions, Installation examples

Attachments

DOWNLOADS

product information

Product data sheet JFZ

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE