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Overpressure dampers are used to equalize the pressure between adjacent rooms and for automatic interruption of air supply or air exhaust. Volume control dampers regulate the air flow volume in ventilation ducts and air conditioning devices. Throttling, shut off and non return dampers and flow rate controllers are used for control the air flow volume in ventilating ducts.
08 Mechanical flow rate controllers Throttling, shut-off and non-return dampers Volume control dampers Overpressure dampers 292 Overpressure dampers are used to equalize the pressures between adjacent rooms and for automatic interruption of air supply or air exhaust. ventilating ducts and air conditioning devices. ventilating ducts. 293 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLESEXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES ■ Overpressure dampers are used to equalize the pressures between adjacent rooms and for automatic interruption of dampers can be produced. ■ Volume control dampers regulate the air conditioning devices. We produce several construction types with manual, motor or pneumatic regulation. ■ - me in ventilating ducts. Overview RŽ-1 RŽ-2 RŽ-3 RŽ-1/G RŽ-7 JNŽ-6 ANŽ-3, ANŽ-4 JNŽ-6W DL RSKDL-2 ZL-2 MRP-2MRP-1 MRP-3 MRP-4 294 Content Page OVERPRESSURE DAMPERS 296 VOLUME CONTROL DAMPERS 301 COMBINATIONS 311 THROTTLING, SHUT-OFF AND NON-RETURN DAMPERS 312 MECHANICAL FLOW RATE CONTROLLERS 319 MOTOR ACTUATORS BELIMO AND JOVENTA 333 Motor actuators 333 295 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLESEXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES H / B H / B H1 /B1 JNŽ-6 ANŽ-3 ANŽ-4 ■ Overpressure dampers are used in all kinds of low pressure air conditioning, air heating ind ventilation, where it is necesary to equalise the pressure between adjacent rooms. They can be applied where the automatic break of the supply and exhaust air is required after conditioning-, heating- or ventilation device has been turned off. Overpressure dampers consist of supporting frame made of galvanized sheet steel (steel overpressure dampers in natural aluminium colour (aluminium of sheet aluminium. The horizontal vanes are inserted into plastic bearings, temperature resistant to 80 °C. Sealing stripe, attached on lower part of vanes reduces noise. In the cases of effective velocities exceeding the values provided in the diagram of the determination of the cases of a likely exposure of the louvres to strong wind gusts, we recommend the installation of a constraint crossbar. to the table of dimensions are possible. Non-standard dimensions are available on request. 100 150 200 250 300 400 500 600 700 800 900 1000 1100 1200 200 250 300 400 500 600 700 800 900 1000 1100 1200 n 1 1 2 3 3 5 6 7 8 10 11 12 13 14 n – number of vanes Overpressure dampers Overpressure dampers H1 /B1 38 82.5 H1 /B1 H1 +15/B1 +15 120 82.5 38 7 B = B1+28 H = H1+28 B2 = B1+23 H2 = H1+23 H1 / B1 H / B H2 / B2 35 82.5 28 B / H B1 B1 B3 H1 H1 H1 H3 H / B B1 Overpressure damper is fastened in built-in frame of angle steel. Designation: JNŽ-6/3 Overpressure damper is fastened on duct. Connection accessories are not supplied. Designation: JNŽ-6 Overpressure damper is fastened in built-in frame Designation: ANŽ-3/2, ANŽ-4/2 H3=(2xH1)+56 B3=(2xB1)+56 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLESEXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES Overpressure dampers 1234560.5 5 20 30 40 50 80 10 100 Air velocity v (m/s) at the effective area A ef Pressure drop Δp cel (Pa) A ef = B1 x (H1-10-(13 x n)) in m² where n is a number of vanes. B1 = 500 mm, H1 = 400 mm, n = 5 Q = 2000 m³/h A ef = 500 x (400 -10-(13 x 5)) = 162500 mm² ≥ 0.16 m² v = (Q / 3600) / A ef = (2000 / 3600) / 0.16 = 3.47 m/s Δp Pressure drop Steel overpressure damper with installation frame: Size: Pcs: Aluminium overpressure damper with installation frame: Size: Pcs: Use the diagram to determine the total pressure drop in respect of air velocity at the free sectional area. 298 Overpressure dampers B1 B1+76 H1 H1+76 B1 B1+76 120 H1 H1+76 120 H1 /B1 H1 +15/B1 +15 120 82.5 38 H1 /B1 38 82.5 ■ is designed for maintaining the preset pressure difference between two rooms or between indoors and outdoors. Depending on its orientation, the louvre can support overpressure or underpressure. It is a rapid-response precisely adjustable passive element for maintaining the pressure difference and is not airtight. Standard dimensions available upon request. an underpressure louvre – to prevent the egress of an overpressure louvre for rooms where preventing the an overpressure valve – to prevent the ingress of gases into smokeless areas. The blades are interconnected using connecting rods. Precise adjustments are performed on-site. Easy to set up: weights are placed on the threaded rods and secured against unscrewing using nuts. 100 150 200 250 300 400 500 600 700 800 900 1000 200 250 300 400 500 600 700 800 900 1000 n 1 1 2 3 3 5 6 7 8 10 11 12 n – number of vanes dimensions are possible. Non-standard dimensions are available on request. 299 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLESEXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES Overpressure dampers Air velocity (m/s) at the effective area A ef 1234 56 0.5 5 20 30 40 50 80 10 100 Pressure drop Δp cel (Pa) B1 = 500 mm, H1 = 400mm, n = 5 Q = 2000 m³/h A ef = 500 x (400 -10 -(13 x 5)) = 162500 mm² ≥ 0.16 m² v = (Q / 3600) / A ef = (2000 / 3600) / 0.16 = 3.47 m/s Δp pressure drop Louvre for maintaining the preset pressure difference JNŽ-6W: Louvre for maintaining the preset pressure difference with installation frame JNŽ-6W/3: Dimensions: Pcs: Preset pressure difference Value of the desired preset pressure difference must be determined extra by the order. Use the diagram to determine the total pressure drop in respect of air velocity at the free sectional area. A ef where n is a number of vanes. 300 Overpressure dampers B1 B1+76 H1 H1+76 φ16 200 38 10 180 ■ Volume control dampers are designed in ventilating ducts and air handling units. They are installed as independent devices or combined with protection- or overpressure louvers. They are made of galvanised sheet steel. Volume control dampers consist of supporting frame and interconnected blades. Blades are inserted into PVC – bearings. When operating by are made of brass. Blades can be moved manually or by the means of the electric actuator. Pneumatic control is also possible. Parallel blades Bearings made of PVC or brass (higher operating Control handle is attached to the blade which is Volume control dampers VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLESEXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES Volume control dampers [...]... AIR NOZZLES Asymetrical AIR DISPLACEMENT UNITS 8 8 Connection frame supplied as per order Dimension upon customer’s request B2 = (2xB1) + 150 Volume control damper: Sizes: Connection frame: Pcs: B1 75/35/2 35/35/4 AIR FLOW CONTROL UNITS 150 SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES B1 divided acc to B EXTERNAL ELEMENTS B VENTILATING GRILLES, VENTILATING VALVES Volume control dampers 305 Volume control. .. is negligible pcel Air low Air velocity in the duct pressure drop diference 5 12 H= SUPPLY AIR NOZZLES 0 20 0 25 5 31 EXTERNAL ELEMENTS 12 B= R Manual control B Power driven but without actuator B1 Actuator LM 24A ActuatorLM 230A Actuator LM 24A SR (continous regulation) AIR FLOW CONTROL UNITS 200 4 SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 100 3 v(m/s) Q(m3/h) AIR DISPLACEMENT UNITS 400 Throttling,... possible SUPPLY AIR NOZZLES Type A parallel blades Type B counterdirectional blades Blade made of sectional sheet steel Bearings made of PVC or brass (higher 20 250 40 Volume control dampers SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES AIR FLOW CONTROL UNITS Volume control dampers RŽ-1/A and RŽ-1/B are available in all sizes 303 Volume control dampers Mechanism for locking selected position R Control via... 31 27 22 22 pcel L 21 45 52 47 42 38 35 34 34 60 59 56 53 51 50 48 47 75 64 62 61 59 59 59 SUPPLY AIR NOZZLES 60 Air low Air velocity in the duct Pressure drop diference Sound power level 58 +30 Size 100 -2 500 -1 0 +1 +2 +3 +4 +5 +6 AIR FLOW CONTROL UNITS +20 EXTERNAL ELEMENTS 100 500 15 AIR DISPLACEMENT UNITS NAZ +10 0 -10 -20 -30 5 10 v (m/s) 15 SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 10 L2 (dB)... 315 Q Flow rate Circular design CIRCULAR DIFFUSERS, SQUARE DIFFUSERS VENTILATING GRILLES, VENTILATING VALVES 2 wire control AIR DISPLACEMENT UNITS Continuous 1 wire control AIR FLOW CONTROL UNITS 2 wire control SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 1 wire control ... which is evident from the draft 40 82.5 Pcs: AIR FLOW CONTROL UNITS Combination: Sizes: SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES min 280 H1+80 / B1+80 82.5 H1 / B1 H1+95 / B1+95 H1 +105 / B1 +105 EXTERNAL ELEMENTS SUPPLY AIR NOZZLES 215 H1+80/B1+80 H1/B1 H1+105/B1+105 H1+95/B1 +95 H1+80/B1+80 82.5 38 38 H1/B1 H1+95/B1+95 H1+105/B1+105 215 AIR DISPLACEMENT UNITS Type B 40 Type A SLOT DIFFUSERS, SWIRL... noise AIR DISPLACEMENT UNITS sheet They are laser butt-welded to eliminate sharp seams both inside and outside The housing of regulator and connecting pie- L1 250 70 340 79 322 40 99 322 120 40 600 124 322 40 150 800 159 322 40 250 1300 199 352 40 400 2200 249 412 60 600 3000 314 462 60 EXTERNAL ELEMENTS L AIR FLOW CONTROL UNITS V SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 100 V 50 Size SUPPLY AIR. .. ROUND DUCT DIFFUSERS VARIABLE SWIRL DIFFUSERS α Air low volume Blade inclination Pressure drop Sound power level Air velocity at the sectional area B x H p LWA CIRCULAR DIFFUSERS, SQUARE DIFFUSERS VENTILATING GRILLES, VENTILATING VALVES Volume control dampers Volume control dampers Volume control dampers are designed ventilating ducts and air handling units Frame and blades are made of extruded aluminium... DISPLACEMENT UNITS 145 pressure line CIRCULAR DIFFUSERS, SQUARE DIFFUSERS VENTILATING GRILLES, VENTILATING VALVES Volume control dampers SM 220-SR 24 VAC Y 0 10 V- 1 Y 0 20 V- 2 2 3 4 5 Y1 Y2 U SM 24-SR SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 1 AIR FLOW CONTROL UNITS U 2 10 V- 309 Volume control dampers a= a= 75° 2000 60° a= 45° 1000 600 90 400 H/B V a= 30° 200 α° Pressuretlaka pcel (Pa) Padec drop 100... 20 R Manual control B Power driven but without actuator Actuator NM 24A / DAS 1.N Actuator NM 230A / DAS 2.N Actuator NM 24A-SR / DMS 1 Actuator SM 24A / DA 1 Actuator SM 230A / DA 2 Actuator SM 24A SR (continuous regulation) / DM 1.1 Pneumatic control Actuator SM 230A SR/DM 2.2 Shut-of damper type The range of applicability of individual actuators – see table on page 333 AIR FLOW CONTROL UNITS p (Pa)