The damper is used where you want an efficient closing at a standstill fan. The air stream operated damper is equipped with springs, which automatically close the damper when the fan stops.

The damper is easy to mount since it is only "pushed" into the duct.

The housing is manufactured of galvanized sheet metal. The butterfly blade is manufactured of aluminium.

The damper is used where you want an efficient closing at a standstill fan. The air stream operated damper is equipped with springs, which automatically close the damper when the fan stops.

The housing is manufactured of galvanized sheet metal. The butterfly blade is manufactured of aluminium.

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.

Shut-off damper with spring return motor

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

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. Although the current is connected, the motor is not damaged if blocked.

When system voltage is connected, the motor starts and tensions the return spring at the same time. The motor stops at its end position and is not damaged by blockage, although system voltage remains.

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.

Continuous regulating damper with electric motor for balancing the flow.

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

Consists of a DTU damper with a 0-10 V continuous regulating 24 electric motor.

The motor shall be completed with control signal transmitter e.g. an external potentiometer or a proportionally regulating thermostat.

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 (0)2-10 V control signal corresponds to 0-90º.

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/DTWU 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°.

DTWU is equipped with a transverse lever, on which pulling ropes can be mounted for manual remote control.

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.

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 flow 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.

Ø 80–630 fullfills tightness class 0 and pressure class A .

Design

The flow meter consists of two reducers 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 the label plate. The plate can be rotated for best legibility, irrespective of the way the unit is installed and can easily be removed, to be located away from the unit.

The unit also contains a regulating damper DRU to allow balancing. The cup around the damper knob allows insulation up to 50 mm thick to be used. If thicker insulation is needed, add the special insulation cup IK.

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.

Ø 80–630 fullfills tightness class 0 and pressure class A .

Design

The meter consists of a regulating shutter and a centrally located measurement plate. Each measurement 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 50 mm thickness to be installed without concealing the measurement nipples or the label plate.

The plate can be rotated for best legibility, irrespective of the way the unit is installed and can easily be removed, to be located away from the unit. The cup around the damper knob allows insulation up to 50 mm thick to be used. If thicker insulation is needed, add the special insulation cup IK.

Advantages

• Short installation length.
• Suitable for use with insulation.

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.

Application

The Controller is suitable for measuring and controlling air flow and measuring temperature. Communication is established via analog signals or digital signal using Modbus. There is also an option to wireless connect to the Controller via Bluetooth.

Design

The Controller consists of a sensor body attached to a damper 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 damper body.

Application

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

There is also an option to wireless connect to the Monitor via Bluetooth.

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.

JSM is a manually operated jalousie damper for the closing off or regulation of ventilation systems.

The damper is built on a frame made from galvanized steel sheet. The damper blades are made from smooth, extruded aluminium profiles with silicon sealing strips on one side, and on the other the side grips to a rubber seal when the damper is closed. The damper blades are in the end sealed with a gasket made from synthetic material.

On the outside of the frame, the damper blades are individually fitted with fine-tooth ratchets, which ensure a very low torque.

Axle shaft 15 x 15 mm is mounted directly to the external ratchet. The external ratchet is supplied with a face plate.

The frame can be made using stainless steel, depending on preference.

Temperature range from -20°C to +80°C.

JSM is supplied with an RJFP 20 connection system as standard. For alternative connection systems, please see table.

JSMM and JSMMU are jalousie dampers for the closing off or regulation of ventilation systems. JSMM is with motor and JSMMU is prepared for motor.

Rectangular regulating damper

Consists of a duct with trapezoid corrugations and a turning blade. Blade angle can be adjusted 0–90° using the knob in the cup, and blade angle is read from an embossed scale on the edge of the cup. Locking is done by two Pozidriv screws (PZD2).

The damper is provided with a joining profile at each end. The length is normally b + 10, but the damper can also be ordered in special lengths.

The cup allows an insulation thickness of 50 mm. If thicker insulation is needed, add the special insulation cup IK to the damper.

Maximum size for the damper is 600 × 600 mm.

LKSR is equipped with joining profile type RJFP.

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.

Backdraught damper for mounting in between two ducts.

For airflow control in ventilation systems.

The blade seats are of rubber to increase tightness and to reduce noise.

When exposed to overpressure the two blades will open and when pressure falls they will shut thanks to mechanical springs.

Manual shut-off sliding damper with transfer joint

The damper meets the requirements for tightness class 4 at pressure class C.

The damper meets the requirements for tightness class C only in fully closed or fully opened position.

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

Pneumatic shut-off sliding damper with transfer joint

The damper meets the requirements for tightness class 4 at pressure class C.

The damper meets the requirements for tightness class C only in fully closed or fully opened position.

Pressurized air cylinder with mounted regulation valve is included.

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

SPZZ pinch protection available as accessories to dimension 80–200.

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.

Cleaning shut-off damper

Consists of a KCU cleaning cover with a blade with rubber gasket 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.