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
  • Application
  • Description

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

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 tube 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
  • Air duct (inner tube) in stainless steel or powder-coated as options

Technical information

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

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.

Nominal sizes125 – 400 mm
Volume flow rate range15 – 1680 l/s or 54 – 6048 m³/h
Volume flow rate control rangeApprox. 15 to 100 % of the nominal volume flow rate
Maximum differential pressure1000 Pa
Operating temperature10 – 50 °C


Quick sizing: Sound pressure level at differential pressure 150 Pa

Nominal sizeVVAir-regenerated noiseAir-regenerated noiseAir-regenerated noiseAir-regenerated noiseCase-radiated noise
Nominal sizeVV
Nominal sizeVVLPALPA1LPA1LPA1LPA2
Nominal sizel/sm³/hdB(A)dB(A)dB(A)dB(A)dB(A)
125 22 79 362516<1516
125 60 216 4536302825
125 105 378 4940343231
125 150 540 5241343235
160 35 126 4130221922
160 100 360 4739343128
160 175 630 5042373432
160 250 900 5344393637
200 60 216 4132242221
200 160 576 4740343329
200 280 1008 5044403832
200 405 1458 5445393838
250 90 324 3830242222
250 245 882 4740343235
250 430 1548 4842383737
250 615 2214 5244383742
315 145 522 4336292629
315 410 1476 4742353439
315 720 2592 4944393842
315 1030 3708 5348424146
400 240 864 4336292631
400 670 2412 4438323037
400 1175 4230 4742363541
400 1680 6048 5044383746

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


Quick sizing: Sound pressure level at differential pressure 150 Pa

Nominal sizeVVAir-regenerated noiseAir-regenerated noiseAir-regenerated noiseAir-regenerated noiseCase-radiated noise
Nominal sizeVV
Nominal sizeVVLPALPA1LPA1LPA1LPA2
Nominal sizel/sm³/hdB(A)dB(A)dB(A)dB(A)dB(A)
125 15 54 3322<15<15<15
125 40 144 3929221920
125 70 252 4637312926
125 100 360 4940343231
160 25 90 4028201620
160 75 270 4535292625
160 125 450 4941363329
160 175 630 5042373432
200 40 144 4031232020
200 125 450 4637313026
200 210 756 4841363530
200 300 1080 5144403833
250 60 216 4132242221
250 200 720 4436312930
250 340 1224 4740353436
250 475 1710 4942383738
315 105 378 4235282528
315 330 1188 4540333135
315 555 1998 4742363540
315 775 2790 5044393843
400 170 612 4336302630
400 545 1962 4337312935
400 920 3312 4540343339
400 1300 4680 4842373543

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 tube 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
  • Air duct (inner tube) in stainless steel or powder-coated as options

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

00107034_0.

 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       Internal 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
       Vmin – Vmax
       Pneumatic control
       Volume flow rate Vmin – Vmax
       Pressure and volume flow cascade       Vmin – Vmax / Δpsetpoint

 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

 

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Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265