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ATEX-compliant parts and units

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ATEX certification

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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

    • Suitable for the control of supply or extract air as well as for differential pressure control

  • Suitable for the control of supply or extract air as well as for differential pressurecontrol
  • 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
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      General information

      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
      • The volume flow rate can later be measured and adjusted on site; configuration is possible using personal computer software

      Nominal sizes

      125, 160, 200, 250, 315, 400

      Classification

      • Electronic control: Equipment group II

      Attachments

      • Electronic control
      • Pneumatic control

      Variants

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

      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 thenominal volume flow rate
      • Maximum differential pressure: 1000 Pa
      • Operating temperature: 10 to 50 °C

      Useful additions

      • Circular silencer CA or CAH (for Germany and Switzerland) or CAH (for EMEA) for demanding acoustic requirements

      Construction features

      • Construction and materials comply with the EU directive and guidelines for use in potentially explosive atmospheres (ATEX)
      • Zones 1 and 2 (atmosphere: gases):II 2 G c II T5: 10 °C - 50°C and T6: 10 °C - 60 °C
      • Zones 21 and 22 (atmosphere: dusts):II 2 D c II 80 °C Pneumatic control: Equipment group II
      • 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
      • Zones 1 and 2 (atmosphere: gases):II 2 G c II T5: 10 °C - 50°C and T6: 10 °C - 60 °C

      Construction

      • Galvanised sheet steel
      • P1: Inner duct powder-coated RAL 7001, silver grey
      • 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 glands suitable for use in potentially explosive atmospheres
      • ATEX-compliant control components, factory mounted and complete with wiring and tubing
      • Aerodynamic functional testing on a special test rig before shipping of each unit
      • Set-up data is given on a label affixed to the unit
      • High control accuracy (even with upstream bend R = 1D)
      • Control components made of die cast aluminium (pneumatic control: plastic)
      • Plastic bearings
      • Damper blade of stainless steel with thermoplastic elastomer seal TPE
      • Differential pressure sensor made of aluminium
      • P1: Inner duct powder-coated
      • A2: Inner duct in stainless steel

      Standards and guidelines

      • Directive 2014/34/EU: Equipment and protective systems intended for use in potentially explosive atmospheres

      Maintenance

      • Maintenance-free as construction and materials are not subject to wear
      • Zero point correction of the static differential pressure transducer should be carried out once per year (recommendation, with electronic control)

      Commissioning

      • The controller parameters are factory set
      • Adjustments may be required as part of commissioning (by others)

      TECHNICAL INFORMATION

      • ‌ Function
      • ‌ TECHNICAL DATA
      • Specification text
      • ORDER CODE
      Schematic illustration of the TVR-Ex with electronic control 

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

      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 to 50 °C


       


       Electronic control with attachment S1S, S1F, S1X or S1Y

      S1SSchischek: Controller ExReg-V-300-A + actuator ExMax-5.10-CY
      S1FSchischek: Controller ExReg-V-300-A + spring return actuator ExMax-5.10-CYF
      S1XSchischek: Controller ExReg-V-300-A + actuator ExMax-5.10-CY + accessories ExSwitch and ExBox
      S1YSchischek: Controller ExReg-V-300-A + spring return actuator ExMax-5.10-CYF + accessories ExSwitch and ExBox
      Supply voltage24 V AC + 15% (24.0 ... 27.6 V AC), 50/60 Hz
      Supply voltage24 V DC + 15% (24.0 ... 27.6 V DC)
      IEC protection classIII (protective extra-low voltage)
      EC conformityATEX to 2014/34/EU, EMC to 2014/30/EU, low voltage to 2014/35/EU
      The information given here is just to give you an idea. 

      For the latest information on the electronic attachments please refer to the technical data in the manufacturer's product documentation:
      Schischek GmbH, 90579 Langenzenn, Germany, www.schischek.com, info@schischek.com
      For the ExReg-V volume flow controller see the documentation from version V04 of 3 June 2022



      Electronic control with attachment TES, TEF, TEX or TEY
      Components

      TESTROX controller TCU3 +

      Schischek components: differential pressure transducer ExCos-P, actuator ExMax-5.10-Y
      TEFTROX: Controller TCU3 +

      Schischek components: differential pressure transducer ExCos-P, spring return actuator ExMax-5.10-YF
      TEXTROX: Controller TCU3 +

      Schischek components: differential pressure transducer ExCos-P + actuator ExMax-5.10-Y + accessories ExSwitch and ExBox
      TEYTROX: Controller TCU3 +

      Schischek components: differential pressure transducer ExCos-P + spring return actuator ExMax-5.10-YF + accessories ExSwitch and ExBox


       


       

      Controller TCU3 (TROX)

      Supply voltage24 V AC ±15% (20.4 .. 27.6 V), 50/60 Hz
      Supply voltage24 V DC ±15% (20.4 .. 27.6 V)
      Supply voltageOptional: 230 V AC mains supply (only with expansion module EM-TRF)
      Power rating8 VA
      Protection levelIP 20
      IEC protection classIII (protective extra-low voltage) if 24 V AC/DC is used
      InstallationIn closed rooms, outside of Ex zones (the TCU3 has to be installed away from TVR-Ex)
      EC conformityEMC to 2014/30/EU


       


       


      Differential pressure transducer (Schischek)

      Supply voltage24 V AC ±20% (19.2 .. 28.8 V), 50/60 Hz
      Supply voltage24 V DC ±20% (19.2 .. 28.8 V)
      IEC protection classI (earthed)
      Protection levelIP 66
      EC conformityATEX to 2014/34/EU, EMC to 2014/30/EU


       


       


      Actuator/spring return actuator (Schischek)

      Supply voltage24... 240 V AC/DC, ±10%, self-adjusting, 50 – 60 Hz ±20%
      Supply voltageWe recommend a mains connection for the actuator
      Power ratingBe sure to see the additional information in the Schischek documentation
      IEC protection classI (earthed)
      Protection levelIP 66
      EC conformityATEX to 2014/34/EU, EMC to 2014/30/EU, low voltage to 2014/35/EU

      The information given here is just to give you an idea.
      For the latest information on the electronic attachments please refer to the technical data in the manufacturer's product documentation:
      Schischek GmbH, 90579 Langenzenn, Germany, www.schischek.com, info@schischek.com


       


       


       Pneumatic

      Operating pressure1.3 bar ± 0.1 bar
      Air consumption – volume flow control50 ln/h
      Air consumption – pressure and volume flow cascade100 ln/h
      Control pressure0.2 – 1.0 bar
      Maximum pressure1.5 bar
      Compressed airCompressed air for instruments, free of oil, water and dust
      Protection levelIP 42


      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 mounted 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
      • The volume flow rate can later be measured and adjusted on site; configuration is possible using personal computer software
      • 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 thenominal volume flow rate
      • Maximum differential pressure: 1000 Pa

        Attachments

        Variable volume flow control with electronic controller to connect an external control signal; actual value signal can be integrated into the central BMS.
      • Supply voltage 24 V AC/DC (controller/differential pressure transducer)
      • Supply voltage 24 V AC/DC (actuator for attachment S1*)
      • Supply voltage 230 V AC (actuator for attachment TE*)
      • Signal voltages 0 – 10 V DC
      • The actual value signal relates to the nominal volume flow rate so that commissioning and subsequent adjustment are simplified
      • Volume flow rate control range: approx. 15 – 100% of thenominal volume flow rate
      • Actuator with adjustable running time, 7.5 – 120 s

        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 with thermoplastic elastomer seal TPE
      • Differential pressure sensor made of aluminium
      • P1: Inner duct powder-coated

        Sizing data

      • qv [m³/h]
      • Δpst [Pa]Air-regenerated noise
      • LPA [dB(A)]Case-radiated noise
      • LPA [dB(A)]

      TVR-Ex with ATEX control component Universal
      TVR-Ex–P1/125/S1F/V0/200 – 400 [m³/h]/NO
      ||||||||
      12345678
      1 Type
      TVR-Ex       VAV terminal unit for use in potentially explosive atmospheres

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

      3 Nominal size [mm]
      125, 160, 200, 250, 315, 400

      4 Attachments (control components)
      Electronic control
      S1S ExReg controller and actuator
      S1F ExReg controller and spring return actuator
      S1X ExReg controller, actuator and auxiliary switch
      S1Y ExReg controller, spring return actuator and auxiliary switch

      5 Operating mode
      V       Variable operation (adjustable setpoint value range)

      6 Signal voltage range
      For the actual and setpoint value signals
      0 0 – 10 V DC
      2 2 – 10 V DC

      7 Operating values for factory setting
      Volume flow rate [m³/h or l/s]
      qᵥmin – qᵥmax

      8 Damper blade position
      Only with spring return actuators (S1F and S1Y)
      NO Power off to open (Normally Open)
      NC Power off to close (Normally Closed)

      Order example: TVR-Ex-P1/125/S1F/V0/200-400[m³/h]/NO
      TypeTVR-Ex
      MaterialInner duct powder-coated, silver grey (RAL 7001)
      Nominal size [mm]125
      Attachments (control components)ExReg controller and spring return actuator
      Operating modeVariable operation (adjustable setpoint value range)
      Signal voltage range0 – 10 V DC
      Operating values for factory setting200 – 400 [m³/h]
      Damper blade positionPower off to open (Normally Open)



      TVR-Ex with ATEX control component based on TCU3
      TVR-Ex–P1/160/TEF/EC–E0/M/200 – 400 [m3/h]/NO
      |||||||||
      123456789
      1 Type
      TVR-Ex       VAV terminal unit for use in potentially explosive atmospheres

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

      3 Nominal size [mm]
      125, 160, 200, 250, 315, 400

      4 Attachments (control components)
      Electronic control (controller outside of the Ex zone)
      TES TCU3 controller and actuator
      TEF TCU3 controller and spring return actuator
      TEX TCU3 controller, actuator and auxiliary switch
      TEY TCU3 controller, spring return actuator and auxiliary switch

      5 Equipment function
      Single operation
      SC Single controller – supply air (Supply Controller)
      EC Single controller – extract air (Extract Controller)

      6 External volume flow rate default setting
      E0       Variable, signal voltage range 0 – 10 V DC
      E2 Variable, signal voltage range 2 – 10 V DC
      2P 2 switching steps (for one switch contact, by others)
      3P 3 switching steps (for two switch contacts, by others)
      F Constant value mode, one setpoint value (no external switch contact)

      7 Expansion modules
      Option 1: Power supply
      No entry: 24 V AC/DC
      T With EM-TRF for 230 V AC mains supply
      U With EM-TRF-USV (including battery pack) for uninterruptible 230 V AC power supply (UPS)

      Option 2: Digital communication interface
      No entry: without digital communication interface
      B With EM-BAC-MOD for BACnet MS/TP
      M With EM-BAC-MOD for Modbus RTU
      I With EM-IP for BACnet IP, Modbus IP and web server
      R With EM-IP (including real time clock, RTC) for BACnet IP, Modbus IP and web server

      8 Operating values for factory setting
      Volume flow rate [m3/h or l/s]

      Depends on external volume flow rate setting
      E0: qᵥmin – qᵥmax
      E2: qᵥmin – qᵥmax
      2P: qᵥ1/qᵥ2
      3P: qᵥ1/qᵥ2/qᵥ3
      F: qᵥ1

      9 Damper blade position
      Only with spring return actuators (TEF and TEY)
      NO Power off to open (Normally Open)
      NC Power off to close (Normally Closed) 


      Order example: TVR-Ex-P1/160/TEF/EC-E0/M/200-400[m3/h]/NO

      TypeTVR-Ex
      MaterialInner duct powder-coated, silver grey (RAL 7001)
      Nominal size [mm]160
      Attachments (control components)TCU3 controller installed outside of the Ex zone (away from the terminal unit)
      ActuatorSpring return actuator
      Equipment functionSingle controller – extract air (Extract Controller)
      External volume flow rate settingVariable, signal voltage range 0 – 10 V DC
      Expansion modules24 V AC/DC power supply, EM-BAC-MOD for Modbus RTU communication interface
      Operating values for factory setting200 – 400 [m3/h]
      Damper blade positionPower off to open (Normally Open)



      TVR-Ex with pneumatic attachments
      TVR-Ex–P1/125/PG5/V/200 – 400 [m³/h]/NO
      | | | | | | |
      1 2 3 4 5 6 7
      1 Type
      TVR-Ex       VAV terminal unit for use in potentially explosive atmospheres

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

      3 Nominal size [mm]
      125, 160, 200, 250, 315, 400

      4 Attachments (control components)
      Pneumatic control
      PG5 Volume flow controller with actuator
      PJ5 Pressure and volume flow cascade (±20 Pa)
      PL5 Pressure and volume flow cascade (±50 Pa)

      5 Operating mode
      V       Variable operation (adjustable setpoint value range)

      6 Operating values for factory setting
      Volume flow rate [m3/h or l/s]

      For attachment PG5
      Volume flow rate qᵥmin – qᵥmax

      For attachments PJ5 and PL5
      Pressure and volume flow cascade qᵥmin – qᵥmax / Δpset

      7 Damper blade position
      Pneumatic actuators
      NO Pressure off to open (Normally Open)
      NC Pressure off to close (Normally Closed)


      Order example: TVR-Ex-P1/125/PG5/V/200-400[m³/h]/NO

      TypeTVR-Ex
      MaterialInner duct powder-coated, silver grey (RAL 7001)
      Nominal size [mm]125
      Attachments (control components)Volume flow controller with actuator
      Operating modeVariable operation (adjustable setpoint value range)
      Operating values for factory setting200 – 400 [m3/h]
      Damper blade positionPower off to open (Normally Open)

      Downloads

      product information

      • Basic information and nomenclature - VAV terminal units

        Basic-information-and-nomenclature_VAV-terminal-units_PD_2022_02_25_DE_en Basic information and nomenclature 490 KB pdf

      • Product data sheet TVR-Ex

        TVR-Ex_PD_2022_07_05_DE_en Product data sheet 880 KB pdf

      certificates

      • Certificate concerning statistical leakage tests

        LC_v1_2024_10_DE_en Certificate  660 KB pdf

      • Declaration of conformity or declaration of incorporation Type TVR-Ex

        CE_2020_09_TVR-Ex_de_en_fr Declaration of conformity or declaration of incorporation 220 KB pdf

      • Declaration of hygiene conformity Type TVR-Ex

        TVR-Ex_HC_2024_05_DE_en Hygiene certificate 1,5 MB pdf

      • Type-Examination Certificate TVR-EX / AK-EX

        TVR-Ex---AK-EX_CE_Type-Examination_2015_01_12_DE_en Certificate  630 KB pdf

      operation manuals

      • Installation and operating manual – Type TVR-Ex

        A00000032577 1,5 MB pdf

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