Type TVRK

For contaminated air

Plastic circular VAV terminal units for aggressive extract air in variable air volume systems

Casing and damper blade made of flame-resistant polypropylene
Slide-out differential pressure sensor allows for easy cleaning
Suitable for the control of volume flow rate, room pressure or duct pressure
Electronic control components for different applications (Universal and LABCONTROL)
Suitable for airflow velocities up to 13 m/s
Closed blade air leakage to EN 1751, class 3
Casing air leakage to EN 1751, class B

Optional equipment and accessories

With flanges on both ends
Matching flanges for both ends
Plastic secondary silencer Type CAK for the reduction of air-regenerated noise

Application

Circular VARYCONTROL VAV terminal units of Type TVRK, made of plastic, preferably for the extract air flow control in variable air volume systems
Closed-loop volume flow control using an external power supply
Suitable for contaminated air
Shut-off by means of switching (equipment supplied by others)

Special features

Integral slide-out differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
Factory set-up or programming and aerodynamic function testing
Volume flow rate can later be measured and adjusted on site; additional adjustment device may be necessary

Variants

TVRK: VAV terminal unit
TVRK-FL: VAV terminal unit with flanges on both ends

Parts and characteristics

Ready-to-commission unit which consists of mechanical parts and control components.
Averaging differential pressure sensor for volume flow rate measurement; can be removed for cleaning
Damper blade
Factory-assembled control components 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

Universal controller: Controller, differential pressure transducer and actuators for special applications
LABCONTROL: Control components for air management systems

Accessories

Matching flanges for both ends

Useful additions

Plastic secondary silencer Type CAK for demanding acoustic requirements

Construction features

Circular casing
Spigot suitable for ducts according to DIN 8077
Both spigots with same diameter
Position of the damper blade indicated externally at shaft extension

Materials and surfaces

Casing and damper blade made of flame-resistant polypropylene (PPs)
Differential pressure sensor and plain bearings made of polypropylene (PP)
Damper blade seal made of chloroprene rubber (CR)

Información técnica

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; the control functions can be achieved with individual components (Universal or LABCONTROL).

For most applications, the setpoint value comes from an external setpoint adjuster.

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

Circular VAV terminal units made of PPs plastic, for variable and constant air volume systems, suitable for 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 and the electronic control components. 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, suitable for ducts according to DIN 8077.

Position of the damper blade indicated externally at shaft extension.

Closed blade air leakage to EN 1751, class 3.

Casing air leakage to EN 1751, class B.

Hygiene conforms to VDI 6022

Special features

Integral slide-out differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
Factory set-up or programming and aerodynamic function testing
Volume flow rate can later be measured and adjusted on site; additional adjustment device may be necessary

Materials and surfaces

Casing and damper blade made of flame-resistant polypropylene (PPs)
Differential pressure sensor and plain bearings made of polypropylene (PP)
Damper blade seal made of chloroprene rubber (CR)

Technical data

Nominal sizes: 125 – 400 mm
Volume flow rate range: 25 to 1680 l/s or 90 to 6048 m³/h
Volume flow rate control range: approx. 17 – 100 % of the nominal volume flow rate
Differential pressure: 5 – 1500 Pa

Attachments

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

Supply voltage 24 V AC/DC
Signal voltages 0 – 10 V DC or 2 – 10 V DC
Possible override controls with external switches using volt-free contacts: CLOSED, OPEN, V_min and V_max
Volume flow rate approx. 17 – 100 % of the nominal volume flow rate