Type TVR-Ex

For the control of variable air volume flows in potentially explosive atmospheres (ATEX)

Circular VAV terminal units for variable air volume systems, approved and certified for potentially explosive atmospheres (ATEX)

ATEX-compliant construction and parts
Approved for all gases, mists and vapours in zones 1 and 2, with electronic control additionally for dusts in zones 21 and 22
Suitable for the control of supply or extract air as well as for differential pressure control
Electronic or pneumatic control components
Closed blade air leakage to EN 1751, up to class 4
Casing air leakage to EN 1751, class C

Optional equipment and accessories

Spring return actuator
Auxiliary switch with adjustable switching points for capturing the end positions

VAV terminal unit Type TVR-Ex 00132058_0

ATEX-Zertifizierung

Application

Circular EXCONTROL VAV terminal units of Type TVR-Ex for the precise supply air or extract air flow control in variable air volume systems
For use in potentially explosive atmospheres (ATEX)
Closed-loop volume flow control using an external power supply
Electronic or pneumatic volume flow control
Shut-off by means of switching (equipment supplied by others)

Special features

ATEX mark and certification
ATEX equipment group II, approved for use in zones 1 and 2; electronic control also for zones 21 and 22
Volume flow rate can later be measured and adjusted on site; configuration is possible using personal computer software

Classification

Electronic control: Equipment group II

Zones 1 and 2 (atmosphere: gases): II 2 G c II T5/T6
Zones 21 and 22 (atmosphere: dusts): II 2 D c II 80 °C

Pneumatic control: Equipment group II

Zones 1 and 2 (atmosphere: gases): II 2 G c II T5/T6

Nominal sizes

125, 160, 200, 250, 315, 400

Construction

Galvanised sheet steel
P1: Inner duct powder-coated, silver grey (RAL 7001)
A2: Inner duct in stainless steel

Parts and characteristics

Ready-to-commission unit which consists of mechanical parts and control components.
Averaging differential pressure sensor for volume flow rate measurement
Damper blade
Connection for equipotential bonding
Cable bushings suitable for use in potentially explosive atmospheres
ATEX-compliant control components, factory assembled and complete with wiring and tubing
Aerodynamic functional testing on a special test rig prior to shipping of each unit
Unit carries test label with relevant data
High control accuracy (even with upstream bend R = 1D)

Attachments

Electronic control
Pneumatic control

Accessories

Actuator with auxiliary switch for capturing the end positions
Spring return actuator

Useful additions

Secondary silencer Type CA for demanding acoustic requirements

Construction features

Construction and materials comply with the EU directive and guidelines for use in potentially explosive atmospheres (ATEX)
Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180

Materials and surfaces

Casing and inner duct made of galvanised sheet steel
Control components made of die cast aluminium (pneumatic control: plastic)
Plastic bearings
Damper blade of stainless steel and with TPE seal (thermoplastic elastomer)
Differential pressure sensor made of aluminium
P1: Inner duct powder-coated
A2: Inner duct in stainless steel

Standards and guidelines

Directive 94/9/EC: Equipment and protective systems intended for use in potentially explosive atmospheres
Closed blade air leakage to EN 1751, class 4 (nominal sizes 125 and 160, class 3).
Nominal sizes 125 and 160 meet the general requirements, nominal sizes 200 – 400 meet the increased requirements of DIN 1946, part 4, with regard to the acceptable closed blade air leakage
Casing air leakage to EN 1751, class C

Maintenance

Maintenance-free as construction and materials are not subject to wear

Electronic control

Zero point correction of the static differential pressure transducer should be carried out once per year (recommendation)

Technical information

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

Schematic illustration of the TVR-Ex with electronic control

① Auxiliary switch
② Static differential pressure transducer
③ Terminal box
④ Cable bushing
⑤ Equipotential bonding
⑥ Actuator

Functional description

The VAV terminal unit is fitted with a differential pressure sensor for measuring the volume flow rate.

The control components (attachments) include a differential pressure transducer that transforms the differential pressure (effective pressure) into an electric signal, a controller, and an actuator.

For most applications, the setpoint value comes from a room temperature controller which is installed outside of the potentially explosive atmosphere.

The controller compares the actual value with the setpoint value and alters the control signal of the damper actuator if there is a difference between the two values.

The connections for the supply voltage and for the voltage signals are made in a terminal box that is suitable for use in potentially explosive atmospheres.

Volume flow rate ranges

The minimum differential pressure of VAV terminal units is an important factor in designing the ductwork and in rating the fan including speed control.

Sufficient duct pressure must be ensured for all operating conditions and for all control units. The measurement points for fan speed control must be selected accordingly.

The volume flow rates given for VAV terminal units depend on the nominal size and on the control component (attachment) that is installed. The table gives the minimum and maximum values for a VAV terminal unit. Some control components may only have a limited volume flow rate range. This applies in particular to control components with a static differential pressure transducer. For volume flow rate ranges for all control components refer to our Easy Product Finder design programme.

Nominal size	V l/s	V m³/h	① ∆p_{st min} Pa	② ∆p_{st min} Pa	③ ∆p_{st min} Pa	④ ∆p_{st min} Pa	∆V ± %
125	22	79	5	5	5	5	15
125	60	216	15	20	20	20	7
125	105	378	45	50	55	60	6
125	150	540	90	100	110	115	5
160	35	126	5	5	5	5	15
160	100	360	15	15	15	15	8
160	175	630	35	40	45	45	7
160	250	900	70	80	85	95	5
200	60	216	5	5	5	5	15
200	160	576	15	15	15	15	7
200	280	1008	35	35	40	40	5
200	405	1458	65	70	75	80	5
250	90	324	5	5	5	5	15
250	245	882	10	10	10	10	7
250	430	1548	25	25	30	35	5
250	615	2214	45	50	55	65	5
315	145	522	5	5	5	5	15
315	410	1476	5	10	10	10	7
315	720	2592	15	20	20	20	6
315	1030	3708	30	35	40	40	5
400	240	864	5	5	5	5	15
400	670	2412	5	5	5	5	7
400	1175	4230	15	15	15	15	6
400	1680	6048	25	30	30	35	5

Nominal size	V l/s	V m³/h	① ∆p_{st min} Pa	② ∆p_{st min} Pa	③ ∆p_{st min} Pa	④ ∆p_{st min} Pa	∆V ± %
125	15	54	5	5	5	5	15
125	40	144	10	10	10	10	10
125	70	252	20	25	25	25	7
125	100	360	40	45	50	55	5
160	25	90	5	5	5	5	15
160	75	270	10	10	10	10	10
160	125	450	20	20	25	25	7
160	175	630	35	40	45	45	5
200	40	144	5	5	5	5	15
200	125	450	10	10	10	10	10
200	210	756	20	20	25	25	7
200	300	1080	40	40	45	45	5
250	60	216	5	5	5	5	15
250	200	720	5	10	10	10	10
250	340	1224	15	15	20	20	7
250	475	1710	30	30	35	40	5
315	105	378	5	5	5	5	15
315	330	1188	5	5	5	5	10
315	555	1998	10	10	15	15	7
315	775	2790	20	20	25	25	5
400	170	612	5	5	5	5	15
400	545	1962	5	5	5	5	10
400	920	3312	10	10	10	10	7
400	1300	4680	15	20	20	20	5

Nominal sizes	125 – 400 mm
Volume flow rate range	15 – 1680 l/s or 54 – 6048 m³/h
Volume flow rate control range	Approx. 15 to 100% of the nominal volume flow rate
Maximum differential pressure	1000 Pa
Operating temperature	10 – 50 °C

Electronic

Supply voltage (AC)	24 V AC ± 10 %, 50/60 Hz
Supply voltage (DC)	24 V DC ± 10 %
Power rating (AC)	20 VA max.
Power rating (DC)	20 W max.
Setpoint value signal input	0 – 10 V DC, R_a > 100 kΩ
Actual value signal output	0 – 10 V DC, max. 0.5 mA
IEC protection class	III (protective extra-low voltage)
Protection level	IP 42
EC conformity	ATEX to 94/9/EG, EMC to 2004/108/EG, low voltage to 2006/95/EG

Pneumatic

Operating pressure	1.3 bar ± 0.1 bar
Air consumption – volume flow control	50 ln/h
Air consumption – pressure and volume flow cascade	100 ln/h
Control pressure	0.2 – 1.0 bar
Maximum pressure	1.5 bar
Compressed air	Compressed air for instruments, free of oil, water and dust
Protection level	IP 42

Quick sizing tables provide a good overview of the room sound pressure levels 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 programme.

The first selection criteria for the nominal size are the actual volume flow rates V_min and V_max. The quick sizing tables are based on generally accepted attenuation levels. If the sound pressure level exceeds the required level, a larger air terminal unit and/or a silencer is required.

TVR-Ex, electronic, Sound pressure level at differential pressure 150 Pa

Nominal size	V		Air-regenerated noise				Case-radiated noise
Nominal size	V		①	②	③	④	①
Nominal size	V		L_PA	L_PA1			L_PA2
Nominal size	l/s	m³/h	dB(A)
125	22	79	36	25	16	<15	16
125	60	216	45	36	30	28	25
125	105	378	49	40	34	32	31
125	150	540	52	41	34	32	35
160	35	126	41	30	22	19	22
160	100	360	47	39	34	31	28
160	175	630	50	42	37	34	32
160	250	900	53	44	39	36	37
200	60	216	41	32	24	22	21
200	160	576	47	40	34	33	29
200	280	1008	50	44	40	38	32
200	405	1458	54	45	39	38	38
250	90	324	38	30	24	22	22
250	245	882	47	40	34	32	35
250	430	1548	48	42	38	37	37
250	615	2214	52	44	38	37	42
315	145	522	43	36	29	26	29
315	410	1476	47	42	35	34	39
315	720	2592	49	44	39	38	42
315	1030	3708	53	48	42	41	46
400	240	864	43	36	29	26	31
400	670	2412	44	38	32	30	37
400	1175	4230	47	42	36	35	41
400	1680	6048	50	44	38	37	46

① TVR-Ex

② TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 500 mm

③ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1000 mm

④ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1500 mm

TVR-Ex, pneumatic, Sound pressure level at differential pressure 150 Pa

Nominal size	V		Air-regenerated noise				Case-radiated noise
Nominal size	V		①	②	③	④	①
Nominal size	V		L_PA	L_PA1			L_PA2
Nominal size	l/s	m³/h	dB(A)
125	15	54	33	22	<15	<15	<15
125	40	144	39	29	22	19	20
125	70	252	46	37	31	29	26
125	100	360	49	40	34	32	31
160	25	90	40	28	20	16	20
160	75	270	45	35	29	26	25
160	125	450	49	41	36	33	29
160	175	630	50	42	37	34	32
200	40	144	40	31	23	20	20
200	125	450	46	37	31	30	26
200	210	756	48	41	36	35	30
200	300	1080	51	44	40	38	33
250	60	216	41	32	24	22	21
250	200	720	44	36	31	29	30
250	340	1224	47	40	35	34	36
250	475	1710	49	42	38	37	38
315	105	378	42	35	28	25	28
315	330	1188	45	40	33	31	35
315	555	1998	47	42	36	35	40
315	775	2790	50	44	39	38	43
400	170	612	43	36	30	26	30
400	545	1962	43	37	31	29	35
400	920	3312	45	40	34	33	39
400	1300	4680	48	42	37	35	43

① TVR-Ex

② TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 500 mm

③ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1000 mm

④ TVR-Ex with secondary silencer CA, insulation thickness 50 mm, length 1500 mm

VAV terminal units for variable and constant air volume systems in potentially explosive atmospheres, suitable for supply or extract air, available in 6 nominal sizes.

High control accuracy (even with upstream bend R = 1D).

Ready-to-commission unit which consists of the mechanical parts, the electronic control components, and parts for equipotential bonding and for use in potentially explosive atmospheres. Each unit contains an averaging differential pressure sensor for volume flow rate measurement and a damper blade.

Factory-assembled control components complete with wiring and tubing.

Differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)

Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180.

Closed blade air leakage to EN 1751, class 4 (nominal sizes 125 and 160, class 3).

Casing air leakage to EN 1751, class C.

Special features

ATEX mark and certification
ATEX equipment group II, approved for use in zones 1 and 2; electronic control also for zones 21 and 22
Volume flow rate can later be measured and adjusted on site; configuration is possible using personal computer software

Materials and surfaces

Casing and inner duct made of galvanised sheet steel
Control components made of die cast aluminium (pneumatic control: plastic)
Plastic bearings
Damper blade of stainless steel and with TPE seal (thermoplastic elastomer)
Differential pressure sensor made of aluminium
P1: Inner duct powder-coated
A2: Inner duct in stainless steel

Construction

Galvanised sheet steel
P1: Inner duct powder-coated, silver grey (RAL 7001)
A2: Inner duct in stainless steel

Technical data

Nominal sizes: 125 to 400 mm
Volume flow rate range: 15 to 1680 l/s or 54 to 6048 m³/h
Volume flow rate control range: approx. 15 – 100 % of the nominal volume flow rate
Maximum differential pressure: 1000 Pa

Attachments

Variable volume flow control with electronic controller to switch a control signal and an actual value signal for integration into the central BMS.

Supply voltage 24 V AC
Supply voltage for actuator: 230 V AC
Signal voltages 0 – 10 V DC
The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
Volume flow rate control range: approx. 15 – 100 % of the nominal volume flow rate
Actuator with adjustable running time, 7.5 – 120 s

Sizing data

V _______________________ [m³/h]
Δp_st _______________________ [Pa]

Air-regenerated noise

L_PA _______________________ [dB(A)]

Case-radiated noise

L_PA _______________________ [dB(A)]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

                                                                              Type
                                                                                                                                                                  TVR-Ex       VAV terminal unit for use in potentially explosive atmospheres

                                                                              Material
                                                                                    No entry: galvanised sheet steel
                                                                                                                                                                  P1       Inner duct powder-coated, silver grey (RAL 7001)
                                                                                                                                                                  A2       Inner duct in stainless steel

                                                                              Nominal size [mm]
                                                                                                                                                                                                                                                              125
                                                                                                                                                                                                                                                              160
                                                                                                                                                                                                                                                              200
                                                                                                                                                                                                                                                              250
                                                                                                                                                                                                                                                              315
                                                                                                                                                                                                                                                              400

                                                                              Attachments (control component)
                                                                                    For example
                                                                                    Electronic control
                                                                                                                                                                  S1S       Integral controller and actuator
                                                                                                                                                                  Pneumatic control
                                                                                                                                                                  PG5       Volume flow controller with actuator
                                                                                                                                                                  PJ5       Pressure and volume flow cascade (±20 Pa)

                                                                              Operating values [m³/h or l/s, Pa]
                                                                                    Electronic control
                                                                                    V_min – V_max
                                                                                                                                                                  Pneumatic control
                                                                                    Volume flow rate V_min – V_max
                                                                                    Pressure and volume flow cascade       V_min – V_max / Δp_setpoint

                                                                              Damper blade position
                                                                                    Only for spring return actuators and pneumatic actuators
                                                                                                                                                                  NO       Pressure off/power off to OPEN
                                                                                                                                                                  NC       Power off/Pressure off to close

Order example: TVR-Ex/200/S1S/400–1200 m³/h

Material	Galvanised sheet steel
Nominal size	200 mm
Attachments	Electronic controller, internal, pressure transducer and actuator
Volume flow rate	400 – 1200 m³/h

Order example: TVR-Ex/160/PG5/200–500 m³/h/NO

Material	Galvanised sheet steel
Nominal size	160 mm
Attachments	Pneumatic volume flow controller with actuator
Volume flow rate	200 – 500 m³/h
Damper blade position	Pressure off to OPEN

Order example: TVR-Ex/160/TES/SC–E0/T/200–900 m³/h

Material	Galvanised sheet steel
Nominal size	160 mm
Attachments	Electronic controller, external, pressure transducer and actuator with auxiliary switch
Equipment function	Supply air controller
Expansion modules	EM-TRF for 230 V AC
Volume flow rate	200 – 900 m³/h

Variants, Attachments, Dimensions and weight

Schematic illustration of the TVR-Ex with electronic control

① VAV terminal unit
② Static differential pressure transducer
③ Actuator
④ Terminal box
⑤ Electronic volume flow controller

TVR-Ex, EXCONTROL Electric control components

Order code detail	Controlled variable	Controller	Differential pressure transducer	Actuator
Internal controller
S1S	Volume flow rate	Universal controller (use in areas with potentially explosive atmospheres) Schischek	Static, integral	Actuator
S1F	Volume flow rate	Universal controller (use in areas with potentially explosive atmospheres) Schischek	Static, integral	Spring return actuator
S1X	Volume flow rate	Universal controller (use in areas with potentially explosive atmospheres) Schischek	Static, integral	Actuator with auxiliary switches
S1Y	Volume flow rate	Universal controller (use in areas with potentially explosive atmospheres) Schischek	Static, integral	Spring return actuator with auxiliary switch
External controller
TES	Volume flow rate	Volume flow rate controller TCU3 (use in areas with potentially explosive atmospheres) TROX/Schischek	Static	Actuator
TEF	Volume flow rate	Volume flow rate controller TCU3 (use in areas with potentially explosive atmospheres) TROX/Schischek	Static	Spring return actuator
TEX	Volume flow rate	Volume flow rate controller TCU3 (use in areas with potentially explosive atmospheres) TROX/Schischek	Static	Actuator with auxiliary switches
TEY	Volume flow rate	Volume flow rate controller TCU3 (use in areas with potentially explosive atmospheres) TROX/Schischek	Static	Spring return actuator with auxiliary switch

TVR-Ex, EXCONTROL Pneumatic control components

Order code detail	Controlled variable	Controller	Differential pressure transducer	Actuator
Volume flow controllers
PG5	Volume flow rate	Volume flow controller Sauter	Integral	Actuator
Pressure and volume flow cascade
PJ5	Room pressure	Room pressure controller ± 20 Pa Volume flow controller Sauter	Integral	Actuator
PL5	Room pressure	Room pressure controller ± 50 Pa Volume flow controller Sauter	Integral	Actuator

Attachments: VARYCONTROL control components

☒

Controlled variable

Interface

V_min -/ V_max - adjustment

Differential pressure transducer

Actuator

Manufacturer

LVC

TVR

TVJ

TVT

TZ-S

TA-S

TVZ

TVA

TVM

TVRK

TVLK

Easy controller

Dynamic

Easy

Integral

①

●

Compact controller

Dynamic

BC0

MP bus

Integral

②

●

BF0

MP bus

Integral

②

●

BL0

LonWorks

Integral

②

●

BM0

Modbus

Integral

②

BM0-J6

Modbus and plug-in connecting cable

Integral

②

XG0

Integral

③

●

XB0

Integral

③

●

LN0

Integral

⑤

●

LK0

KNX

⑤

LY0

Integral

⑤

●

Compact controller

Static

SA0

Integral

④

SC0

Δp

Integral

Fast-running actuator, integral

④

Universal controller

Dynamic

B11

Integral

Actuator, torque for TVT

②

●

B13

Integral

Actuator

②

●

B27

Integral

Actuator

②

●

B1B

Integral

Spring return actuator

②

●

XC3

Integral

Spring return actuator

③

●

Universal controller

Static

BP1

MP bus

Separate part

Actuator, torque for TVT

②

●

BP3

MP bus

Separate part

Actuator

②

●

BPB

MP bus

Separate part

Spring return actuator

②

●

BPG

MP bus

Separate part

Fast-running actuator

②

●

BB1

Separate part

Actuator, torque for TVT

②

●

BB3

Separate part

Actuator

②

●

BBB

Separate part

Spring return actuator

②

●

XD1

Integral

Actuator

③

●

XD3

Integral

Spring return actuator

③

●

BR1

Δp

MP bus

100 Pa

Actuator, torque for TVT

②

●

BR3

Δp

MP bus

100 Pa

Actuator

②

●

BRB

Δp

MP bus

100 Pa

Spring return actuator

②

●

BRG

Δp

MP bus

100 Pa

Fast-running actuator

②

●

BS1

Δp

MP bus

600 Pa

Actuator, torque for TVT

②

●

BS3

Δp

MP bus

600 Pa

Actuator

②

●

BSB

Δp

MP bus

600 Pa

Spring return actuator

②

●

BSG

Δp

MP bus

600 Pa

Fast-running actuator

②

●

BG1

Δp

100 Pa

Actuator, torque for TVT

②

●

BG3

Δp

100 Pa

Actuator

②

●

BGB

Δp

100 Pa

Spring return actuator

②

●

BH1

Δp

600 Pa

Actuator, torque for TVT

②

●

BH3

Δp

600 Pa

Actuator

②

●

BHB

Δp

600 Pa

Spring return actuator

②

●

XE1

Δp

Integral, 100 Pa

Actuator

③

●

XE3

Δp

Integral, 100 Pa

Spring return actuator

③

●

XF1

Δp

Integral, 600 Pa

Actuator

③

●

XF3

Δp

Integral, 600 Pa

Spring return actuator

③

●

① TROX, ② TROX/Belimo, ③ TROX/Gruner, ④ Sauter, ⑤ Siemens

☒ order code detail, V volume flow rate, Δp differential pressure

Attachments: LABCONTROL control components

☒

Controlled variable

Interface

V_min -/ V_max - adjustment

Differential pressure transducer

Actuator

TVR

TVJ

TVT

TZ-S

TA-S

TVZ

TVA

TVRK

TVLK

Easylab controller

Static

Elab

Room supply air

Room extract air

Room pressure

Single controller

TCU3

Integral

Fast-running actuator

●

Elab

Room supply air

Room pressure

Single controller

TCU3

Integral

Fast-running actuator

●

Elab

Room extract air

Room pressure

Single controller

TCU3

Integral

Fast-running actuator

●

Elab

Room supply air

Room extract air

Room pressure

Fume cupboard

Single controller

TCU3

Integral

Fast-running actuator

●

Electronic controller

Static

TMA

Room supply air

Room extract air

Room pressure

TCU-LON-II with LonWorks interface

Integral

Fast-running actuator

●

TMB

Fast-running actuator (brushless motor)

●

TMA

Room supply air

Room pressure

TCU-LON-II with LonWorks interface

Integral

Fast-running actuator

●

TMB

Fast-running actuator (brushless motor)

●

TMA

Room extract air

Room pressure

TCU-LON-II with LonWorks interface

Integral

Fast-running actuator

●

TMB

Fast-running actuator (brushless motor)

●

TMA

Room supply air

Room extract air

Room pressure

Fume cupboard

TCU-LON-II with LonWorks interface

Integral

Fast-running actuator

●

TMB

Fast-running actuator (brushless motor)

●

TVR-Ex 00186651_0

Nominal size	ØD mm	B₃ mm	H₃ mm	C mm
125	124	372	221	129
160	159	372	221	111
200	199	463	311	182
250	249	463	311	157
315	314	627	461	289
400	399	627	461	246

Nominal size	TVR-Ex/.../TEx m kg	TVR-Ex/.../Pxx m kg
125	17.5	15.5
160	17.5	15.5
200	19.0	17.0
250	19.0	17.0
315	23.0	21.0
400	23.0	21.0

Installation details, Basic information and nomenclature

Bend

A bend with a centre line curvature radius of at least 1D – without an additional straight duct section upstream of the VAV terminal unit – has only a negligible effect on the volume flow rate accuracy.

Installation and commissioning

Connections for equipotential bonding: Suitable cables must be connected by others

Electronic control

Any installation orientation
Zero point correction required

Pneumatic control

Installation orientation must be as shown on the sticker

Upstream conditions

The volume flow rate accuracy ΔV applies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulence that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN 1505. Some installation situations require straight duct sections upstream.

Space required for commissioning and maintenance

Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings.

Space required

Nominal size	①	②	③
Nominal size	mm
125	600	220	300
160	600	220	300
200	600	310	300
250	600	310	300
315	600	460	300
400	600	460	300

Definition of noise

① Air-regenerated noise
② Case-radiated noise

Principal dimensions

ØD [mm]

VAV terminal units made of stainless steel: Outside diameter of the spigot

VAV terminal units made of plastic: Inside diameter of the connecting spigot

ØD₁ [mm]

Pitch circle diameter of flanges

ØD₂ [mm]

Outside diameter of flanges

ØD₄ [mm]

Inside diameter of the screw holes of flanges

L [mm]

Length of unit including connecting spigot

L₁ [mm]

Length of casing or acoustic cladding

B [mm]

Duct width

B₁ [mm]

Screw hole pitch of flange (horizontal)

B₂ [mm]

Outside dimension of flange (width)

B₃ [mm]

Width of device

H [mm]

Duct height

H₁ [mm]

Screw hole pitch of flange (vertical)

H₂ [mm]

Outside dimension of flange (height)

H₃ [mm]

Unit height

n [ ]

Number of flange screw holes

T [mm]

Flange thickness

m [kg]

Unit weight including the minimum required attachments (e.g. Compact controller)

Acoustic data

f_m [Hz]

Octave band centre frequency

L_PA [dB(A)]

A-weighted sound pressure level of air-regenerated noise of the VAV terminal unit, system attenuation taken into account

L_PA1 [dB(A)]

A-weighted sound pressure level of air-regenerated noise of the VAV terminal unit with secondary silencer, system attenuation taken into account

L_PA2 [dB(A)]

A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit, system attenuation taken into account

L_PA3 [dB(A)]

A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit with acoustic cladding, system attenuation taken into account

All sound pressure levels are based on 20 μPa.

Volume flow rates

V_nom [m³/h] and [l/s]

Nominal volume flow rate (100 %)

The value depends on product type and nominal size
Values are published on the internet and in technical leaflets, and stored in the Easy Product Finder design software.
Reference value for calculating percentages (e.g. V_max)
Upper limit of the setting range and maximum volume flow rate setpoint value for the VAV terminal unit

V_{min unit} [m³/h] and [l/s]

Technically possible minimum volume flow rate

The value depends on product type, nominal size and control component (attachment)
Values are stored in the Easy Product Finder design software
Lower limit of the setting range and minimum volume flow rate setpoint value for the VAV terminal unit
Depending on the controller, setpoint values below V_{min unit} (if V_min equals zero) may result in unstable control or shut-off

V_max [m³/h] and [l/s]

Upper limit of the operating range for the VAV terminal unit that can be set by customers

V_max can only be smaller than or equal to V_nom
In case of analogue signalling to volume flow controllers (which are typically used), the set maximum value (V_max) is allocated to the setpoint signal maximum (10 V) (see characteristic)

V_min [m³/h] and [l/s]

Lower limit of the operating range for the VAV terminal unit that can be set by customers

V_min should be smaller than or equal to V_max
Do not set V_min smaller than V_{min unit}, otherwise the control may become unstable or the damper blade may close
V_min may equal zero
In case of analogue signalling to volume flow controllers (which are typically used), the set minimum value (V_min) is allocated to the setpoint signal minimum (0 or 2 V) (see characteristic)

V [m³/h] and [l/s]

Volume flow rate

ΔV [± %]

Volume flow rate tolerance from setpoint value

ΔV_warm [± %]

Volume flow rate tolerance for the warm air flow of dual duct terminal units

Differential pressure

Δp_st [Pa]

Static differential pressure

Δp_st min [Pa]

Static differential pressure, minimum

The static minimum differential pressure is equal to the pressure loss of the VAV terminal unit when the damper blade is open, caused by flow resistance (sensor tubes, damper mechanism)
If the pressure on the VAV terminal unit is too low, the setpoint volume flow rate may not be achieved, not even when the damper blade is open
Important factor in designing the ductwork and in rating the fan including speed control
Sufficient duct pressure must be ensured for all operating conditions and for all terminal units, and the measurement point or points for speed control must have been selected accordingly to achieve this

Construction

Galvanised sheet steel

Casing made of galvanised sheet steel
Parts in contact with the airflow as described for the product type
External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

Powder-coated surface (P1)

Casing made of galvanised sheet steel, powder-coated RAL 7001, silver grey
Parts in contact with the airflow are powder-coated or made of plastic
Due to production, some parts that come into contact with the airflow may be stainless steel or aluminium, powder-coated
External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

Stainless steel (A2)

Casing made of stainless steel 1.4201
Parts in contact with the airflow are powder-coated or made of stainless steel
External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

Downloads

TROX Services

Productsearch A-Z Find out quickly and simply.

TROX Easy Product Finder Fast. Reliable. Innovative.

Tour de Competence Competence - exciting staged.

Type TVR-Ex

For the control of variable air volume flows in potentially explosive atmospheres (ATEX)

Technical information

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

Variants, Attachments, Dimensions and weight

Installation details, Basic information and nomenclature

Downloads

TROX Services

Attachment (max. 10MB)

Your message

Your message to

Attachment (max. 10MB)

Your message

Your message to