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, 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
small_tab1_Serie TVR-Ex
  • 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 function testing on a special test rig prior to shipping of each unit
  • Set-up data is given on a label or volume flow rate scale affixed to the unit
  • 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

Información técnica

  • Function
  • Technik
  • 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.

tvr_ex
tvr_ex

 

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, 160, 200, 250, 315, 400
  • Volume flow rate range: 15 to 1680 l/s or 54 to 6050 m³/h
  • Volume flow rate control range: approx. 15 – 100 % of the nominal volume flow rate
  • Differential pressure: 5 – 1500 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 approx. 15 – 100 % of the nominal volume flow rate
  • Actuator with adjustable running time, 7.5 – 120 s
tvr_ex

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Estamos aquí para atenderles

Visual contact Visual contact

Por favor mande su solicitud
Tel.: +34 976 50 02 50 | Fax: +34 976 50 09 04

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Los campos marcados con un (*) sin imprescindibles de cumplimentar

Contacto

Gracias por su mensaje.

Visual contact Visual contact

Su mensaje ha sido enviado correctamente, en breve será atendido.
En seguida nos pondremos en contacto con Vd.
Para información general sobre productos o servicios, por favor llamar al:
Tel.: +34 976 50 02 50 | Fax: +34 976 50 09 04