Constant flow damper with electric motor for switching between two flows

DA2EU is a constant flow damper, which facilitates balancing of ventilation systems and gives correct flow from the start. The unit compensates e.g. connection and disconnection of system parts, clogging of filters and ducts, thermal lift forces, wind effects, window opening etc. The motors shall be completed with a switch. The switch can in turn be controlled either manually with timer, with on/off-thermostat, with attendance transmitter or similar.

Ø 80–315 fullfills pressure class A in closed position.

Fulfils tightness class C.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Constant flow damper with manual setting of one flow

DAU is a constant flow damper, which facilitates balancing of ventilation systems and gives correct flow from the start.

The unit compensates e.g. connection and disconnection of system parts, clogging of filters and ducts, thermal lift forces, wind effects, window opening etc.

Ø 80–315 fullfills pressure class A in closed position.

Fulfils tightness class C.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Technical data

Flow setting

The flow is set by loosing the center nut and via the knob turning the scale arrow so it points at the wanted flow on the scale. Then the center nut is tightened.

Constant flow damper with electric motor for continuous setting of one flow

DAVU is a constant flow damper, which facilitates balancing of ventilation systems and gives correct flow from the start. The unit compensates e.g. connection and disconnection of system parts, clogging of filters and ducts, thermal lift forces, wind effects, window opening etc. The motor shall be completed with control signal transmitter e.g. an external potentiometer or a proportionally regulating thermostat. A special mounting, measuring, balancing and maintenance instruction exists for this product.

Ø 80–315 fullfills pressure class A in closed position.

Fulfils tightness class C.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

The motor-driven damper DIRBU with flow meter is suitable for systems where it should be possible to increase the air flow or lower it to the basic level. Examples of such systems are conference rooms and public areas.

It fulfils tightness class C. DIRBU is intended for use where you want to be able to set two air flows.

Maximum and minimum flow is set with the measurement nozzles and are fixed with the two end stop screws on the motor.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 100–315 fulfills pressure class A in closed position.

Cleaning

By fully open the damper, one get access to the duct. Do not forget to readjust the damper after cleaning.

Installation

Consider required straight distance after or before disturbance, as mentioned on page DIRU and on the card attached to the measurement nozzles, to obtain accurate flow measurement.

The damper DIRU with flow meter offers measurement of the air flow. DIRU has the following characteristics: low noise level, centric flow, fixed measurement nozzles for accurate flow measurement and is equipped with regulating facilities that can be fully opened, which means that you do not need cleaning covers. It fulfils tightness class C.

The dimension graph is to be used to determine the pressure drop over the damper with flow meter and to give information regarding the sound effect level at different settings. When balancing the system the balancing graph should be used.

There is a separate assembly, measuring, balancing and maintenance instruction for dampers with flow meter.

The damper blades forms a measuring flange which allows flow measuring. By measuring the pressure difference between the measure nozzles, you can through the equation on the damper derive the flow q [l/s]. The setting value of the damper and the correction factor (k-factor) is the same number which means that you do not have to read a graph in order to get the k-factor from a setting value.

The air flow is regulated with a handle.

Ø 80–630 fullfills pressure class A in closed position.

Material

The damper is made of hot-dip galvanized sheet steel.

Installation

Consider required straight distance after or before disturbance, as mentioned on the card attached to the measurement nozzles, to obtain accurate flow measurement.

Cleaning

By fully open the damper, one get access to the duct. Do not forget to readjust the damper after cleaning.

The motor-driven damper DIRVU with flow meter is suitable for systems where it should possible to vary the air flow. Examples of such systems are conference rooms and public areas. It fulfils tightness class C.

Maximum and minimum flow is set with the measurement nozzles and are fixed with the two end stop screws on the motor. A special mounting, measuring, balancing and maintenance instruction exists for this product.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 100–315 fullfills pressure class A in closed position.

Cleaning

By fully open the damper, one get access to the duct. Do not forget to readjust the damper after cleaning.

Installation

Consider required straight distance after or before disturbance, as mentioned on page DIRU and on the card attached to the measurement nozzles, to obtain accurate flow measurement.

Has a turning, cut-off blade. The blade is stepless adjustable 0–90°. The damper admits an insulation thickness of approx. 50 mm.

The blade is designed to generate a minimum of noise. The noise is approx. the same as for a perforated blade. But the blade is less sensitive to clogging since it lacks perforations.

Setting angle a
a = 0° = open blade, a = 90° = closed blad

Has a turning, circular blade. The blade is stepless adjustable 0–90°. The damper is used when you have lower demands for shut-off capacity. The damper admits an insulation thickness of approx. 50 mm.

The damper can on occations be used for regulation.

Setting angle a
a = 0° = open blade, a = 90° = closed blade

Shut-off or regulating damper.

With internal Belimo-motor and blade combination type CM … D, with plastic blade, specially suitable where space is limited.

The housing fulfills tightness class D.

For systems with low requirements at shut-off capacity.

With telescopic function, hence also suitable for simple additional retrofitting.

Available with motors for 24 V DC and AC or 230 V AC (CM .. –L-…D).

On-/Off- or 3-point regulation.

Please look at www.belimo.com for motor data.

Shut-off or regulating damper.

With internal Belimo-motor and blade combination type CM … D, with plastic blade, specially suitable where space is limited.

The housing fulfills tightness class D.

For systems with low requirements at shut-off capacity.

With telescopic function, hence also suitable for simple additional retrofitting.

For 24 V available with stepless regulation motor (CM 24 –SR-L…D).

Please look at www.belimo.com for motor data.

The DTBCU is a spring return damper which closes if the electrical power is off. The damper can be ordered with the following control option.

24 or 230 V on off motor

24 V motor with 2-10 V analog control signal
(motortype -SR)

24 V motor with data bus control; Modbus, BACnet, MP-Bus
(motortype - MOBA)

The motor has overload protection and stops automatically when the blade has reached its end stop. Although the current is connected, the motor is not damaged if blocked.

When the power is cut, the damper closes when the drive motor freewheels and the return spring pulls the blade back to its original position.

If you want the damper to open instead of close, you can undo the two nuts on the spindle clamp, turn the spindle 90°and tighten the nuts again.

In outdoor installation, the motor should be protected from direct UV radiation.

The motor is installed at a distance from the damper, which makes it easy to insulate the ventilation duct.

There is a separate assembly, measuring balancing and maintenance instruction for this product.

Shut-off damper with electric motor LM 24 A-F, LM 230 A-F, CM 24 F or CM 230 F.

Consists of a DTU damper with a 24 or 230 V motor added.

Has a low height to fit at narrow spaces.

In outdoor installation, the motor should be protected from direct UV radiation.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Fulfills pressure class C in closed position.

Shut-off damper with electric motor.

Consists of a DTU damper with a 24 or 230 V electric motor added. Ø900 and 1000 has two motors.

The motor is controlled by a single-pole breaking contact.

The motor has overload protection and stops automatically when the blade has reached its end stop. The stop can be continually adjusted. Although the current is connected, the motor is not damaged if blocked.

The spindle and motor can be disconnected from each other via a release button on the motor housing.

In outdoor installation, the motor should be protected from direct UV radiation.

The motor is installed at a distance from the damper, which makes it easy to insulate the ventilation duct.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

DTBVU is a damper, which facilitates continuously balancing of ventilation systems and can be controlled by a superior control system.

The damper can be ordered with the following control option:

24 V motor with 2-10 V analog control signal
(motortype -SR).

24 V motor with data bus control; Modbus, BACnet, MP-Bus
(motorype -MOBA).

The motor shall be completed with control signal transmitter e.g. an external potentiometer or a proportionally regulating thermostat or an external control device adopted to data bus communication.

The motor has overload protection and stops automatically when the blade has reached its end stop. The stop can be continually adjusted. Although the current is connected, the motor is not damaged if blocked.

The spindle and motor can be disconnected from each other via a release button on the motor housing.

In outdoor installation, the motor should be protected from direct UV radiation.

The motor is installed at a distance from the damper, which makes it easy to insulate the ventilation duct.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Shut-off damper with electric motor LMQ 24A or LMQ 24A-SR.

Consists of a DTU damper with a 24 V electric motor added.

The motors stops at its end position and is not damaged by blockage, although system voltage remains.

In outdoor installations, the motor must be protected from rain and direct UV radiation.

The motor is installed at a distance from the damper, which makes it easy to insulate the ventilation duct.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 80–250 fullfills pressure class C in closed position.

The torque needed for motorizing is given in the adjacent table.

Shut-off damper with motor shelf HYLLA LMNM.

Consists of a DTU damper with motor shelf HYLLA LMNM added.

The damper is designed to have a motor added on site.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 80–315 fullfills pressure class C in closed position.
Ø 400–500 fullfills pressure class B in closed position.

Motorizing

See separate motorizing table.

The torque needed for motorizing is given in the adjacent table.

Shut-off damper with motor shelf HYLLA DTH2U.

Consists of a DTU damper with motor shelf HYLLA DTHU2U added.

The damper has neither any cup nor any knob, and has a longer spindle to avoid the need for extension spindle VREDF. The damper is designed to have a motor added on site.

Has a low height to fit at narrow spaces.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Fulfills pressure class C in closed position.

Motorizing

The motor shelf is suitable for Belimo's CM...F and LM...F motors.

The torque needed for motorizing is given in the adjacent table.

Shut-off damper with motor shelf KOMHY

Ø 80–630 consists of a DTU damper with a KOMHY combined motor shelf added. The damper has no knob, and has a longer shaft to avoid the need for extension shaft VREDF. The damper is designed to have a motor added on site.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 80–315 fullfills pressure class C in closed position.
Ø 355–630 fullfills pressure class B in closed position.
Ø 710–1000 fullfills pressure class A in closed position.

Motorizing

The motor shelf KOMHY is provided with suitable fixing holes for Belimo´s LM, NM SM and AF motors.

Ø 900 and 1000 has two motor shelves.

Also the dampers DRU and DSU can be ordered in this version.

DTMU are tight-closing shut-off dampers. The dampers can be used to completely shut off the air flow.

The blade consists of double sheet metal with a intermediate sealing of EPDM-rubber, which is in contact with the inside of the damper housing when in the closed position.

DTMU is equipped with a handle and a locking mechanism for stepless adjustment of 0–90° without tools.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 80–315 fullfills pressure class C in closed position.
Ø 355–630 fullfills pressure class B in closed position.

Shut-off damper with pneumatic actuator

Consists of a DTU damper with a pneumatic actuator installed. The actuator consists of a polyamide housing and metal parts of stainless steel.

When the actuator's control pressure increases, the actuator opens the damper blade. When the actuator's control pressure decreases, the actuator closes the damper blade, by using the spring inside the actuator. The damper blade is closed on delivery.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Has a turning circular blade with an EPDM-rubber seal which tightens against the inside of the damper when closed. The blade can be adjusted in a 0–90° angle.

The cup at Ø 80–630 can be complemented with the special insulation cup IK at insulation thicker than 50 mm.

The damper can be used for regulating at rare occations.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 80–315 fullfills pressure class C in closed position.
Ø 355–630 fullfills pressure class B in closed position.
Ø 710–1000 fullfills pressure class A in closed position.

Motorizing

The torque needed for the motorizing is given in the adjacent table.

Ø710–1000 is not possible to motorize on site.

Applications

The meter is suitable both for setting up and for continous flow measurement. It is intended for permanent installation and must therefore be specified at the design stage.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Design

The meter consists of two reductions joined together, with measurement nozzles. Each nozzle has a removable plastic plug which prevents dirt from entering. It also eliminates air leakage when measurement is not done.

The unit permits insulation of up to 100 mm thickness to be installed without concealing the measurement nozzles or label plate. The plate can be rotated for best legibility, irrespective of the way the fitting is installed and can easily be removed, to be located away from the unit.

Flow meters with reductions of two dimension steps can be obtained, to give higher reading pressure in the measurement nozzles. This entails higher pressure drop and noise generation, however.

FRU is a measuring unit with a measuring cross used for measuring volume air flow rate in circular duct systems.

FRU is equipped with a regulator, providing an output signal that is proportional to the volume air flowrate. FRU can be used to monitor the actual airflow or can be used to control a volume flow regulator.
Regulators comes with either flow sensor (D3) for clean air or membrane sensor (M1) for contaminated air.

FRU is equipped with Lindab Safe in the front for connection to the duct and a female coupling in the back, and is ready for insulation up to 50 mm.
FRU can be installed in any position without requiring adjustment.

The FRU needs a certain distance of straight duct before the unit and this has to be observed to obtain a stable and accurate air flow regulation.

To avoid clogging of the measuring cross, it is recommended to use FRU only in applications with clean air, meaning free of dust, particles and similar.

• Belimo MP, Modbus, BACnet & analogue 0(2)-10V.
• Integrated NFC interface, compliable with Belimo Assistant App.

Application

The Controller is suitable for measuring and controlling air flow and measuring temperature. Communication is established via analog signals and/or digital signal using Modbus.

The Controller can also be commissioned via Bluetooth.

The OneLink app is the perfect tool to monitor and adjust the airflow directly via a mobile device, which speeds up installation and commissioning.

Design

The Controller consists of a sensor body attached to a damper body with Lindab Safe gaskets.

Two transducers are mounted on the sensor body and connected to a display unit. The display unit is mounted on top of a shelf on the damper body.

The product has a pre-mounted cable which makes it easy to connect.

The shelf, FTES, can be used for mounting equipment such as an electrical junction box or a Regula Combi.

Application

The Monitor is suitable for measuring air flow and temperature. Communication is established via analog and/or digital signal using Modbus.

The Monitor can also be commissioned via Bluetooth.

The OneLink app is the perfect tool to monitor the airflow directly via a mobile device, which speeds up installation and commissioning.

Design

The Monitor consists of a sensor body with Lindab Safe gaskets.

Two flow sensors are mounted on the sensor body and connected to a display unit. The display unit is mounted on top of a shelf on the sensor body.

The product has a pre-mounted cable which makes it easy to connect.

The shelf, FTES, can be used for mounting equipment such as an electrical junction box or a Regula Combi.

Manual regulation damper. The damper is double-jacketed and insulated with mineral wool and is supplied with Safe rubber seal on the inner dimension.

With stop bead to ensure correct installation.

Manual closing damper, without sealing at the blade.

The damper is double-jacketed and insulated wiht mineral wool and is supplied wiht saferubber seal on the inner dimension.

With stop bead to ensure correct installation.

Cleaning regulating damper

Consists of a KCU cleaning cover with a blade without rubber gasket similar to the DRU and a PSU collar saddle in whose branch the cleaning cover is fixed.

The branch is provided with a Safe seal.

Since it is easy to remove the cleaning cover together with the blade, it is easy to inspect and clean the ventilation system. The original pressure balance in the system is not affected since the blade and cleaning cover retain their mutual positions which they were given during balancing. The damper can be used to advantage, to complete an existing ventilation system.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 100–400 fullfills pressure class A in closed position.

Alternating shut-off damper

Consists of an extended T-piece and two linked DSU dampers.

Can be used for "by pass" ducts. It thereby replaces two conventional dampers + two couplings + one T-piece and is 20–30% shorter.

Alternating shut-off damper with electric motor – NM 24 A-F or NM 230 A-F

Consists of an extended T-piece with two linked DTU dampers and a 24 or 230 V electric motor installed.

Can be used for "by pass" ducts. This means that it replaces two conventional dampers + two couplings + one T-piece and is 20–30% shorter.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 100–400 fullfills pressure class A in closed position.

Alternating shut-off damper

Consists of an extended T-piece and two linked DTU dampers.

Can be used for "by pass" ducts. It thereby replaces two conventional dampers + two couplings + one T-piece and is 20–30% shorter.

Cleaning regulating damper

Consists of a KCU cleaning cover with a blade without rubber gasket similar to the DRU and a TCPU T-piece in whose branch the cleaning cover is fixed.

The branch is provided with a Safe seal.

Since it is easy to remove the cleaning cover together with the blade, it is easy to inspect and clean the ventilation system. The original pressure balance in the system is not affected since the blade and cleaning cover retain their mutual positions which they were given during balancing.

There is a separate assembly, measuring, balancing and maintenance instruction for this product.

Ø 100–400 fullfills pressure class A in closed position.

Constant flow damper with manual setting of one flow.

VRL1 is a constant flow damper, which facilitates balancing of ventilation systems and gives correct flow from the start.

The unit compensates for e.g. connection and disconnectionof system parts, clogging of filters and ducts, thermal lift forces, wind effects, window opening etc.

Ø 80–250 fullfills pressure class A in closed position.