Sizes JNŽ-6, ANŽ-3, ANŽ-4

Transcription

1 JNŽ-6, ANŽ-3, ANŽ-4 Application 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. JNŽ-6 ANŽ-3, ANŽ-4 Description consist of supporting frame made of galvanized sheet steel (steel overpressure dampers JNŽ-6) or aluminium section anodised in natural aluminium colour (aluminium overpressure dampers ANŽ-3 and ANŽ-4) and horizontal swinging vanes 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. Caution In the cases of effective velocities exceeding the values provided in the diagram of the determination of the total pressure drop on page 298, or in the cases of a likely exposure of the louvres to strong wind gusts, we recommend the installation of a constraint crossbar. JNŽ-6 ANŽ-3 ANŽ-4 / B 1 Sizes All combinations of and according to the table of dimensions are possible. Non-standard dimensions are available on request. Sizes JNŽ-6, ANŽ-3, ANŽ-4 (mm) (mm) n n number of vanes 296

2 Air flow control units Installation 7 VENTILATING GRILLES, VENTILATING VALVES / B 1 Overpressure damper is fastened in built-in frame of angle steel. Designation: JNŽ-6/3 +15 / +15 Overpressure damper is fastened on duct. Connection accessories are not supplied. Designation: JNŽ-6 Combinations of larger overpressure dampers JNŽ-6, ANŽ-3, ANŽ-4: / B 1 38 H2 / B2 35 B = +28 H = +28 B2 = +23 H2 = +23 Overpressure damper is fastened in built-in frame Designation: ANŽ-3/2, ANŽ-4/2 / CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS H3 B3 B / H AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS H3=(2x)+56 B3=(2x)+56 SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES AIR FLOW CONTROL UNITS 297

3 Pressure drop diagram Use the diagram to determine the total pressure drop in respect of air velocity at the free sectional area. Example of calculation for JNŽ-6, ANŽ-3, ANŽ-4 A ef = x (-10-(13 x n)) in m² where n is a number of vanes. = 500 mm, = 400 mm, n = 5 Q = 2000 m³/h A ef = 500 x ( (13 x 5)) = mm² 0.16 m² v = (Q / 3600) / A ef = (2000 / 3600) / 0.16 = 3.47 m/s Δp cel (Pa) Pressure drop Ordering example Pressure drop pcel (Pa) Steel overpressure damper with installation frame: JNŽ-6/3 x Size: =500 =428 Aluminium overpressure damper with installation frame: ANŽ-4/2 x Size: =500 = Air velocity v (m/s) at the effective area Aef 298

4 Air flow control units Louvre for maintaining the preset pressure difference JNŽ-6W Application The JNŽ-6W louvre for maintaining the preset pressure difference 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: from 200x100 to 1000x1000 with 50 mm steps. Other dimensions available upon request. VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS It can be used as an underpressure louvre to prevent the egress of substances (chemicals, smoke, etc.); an overpressure louvre for rooms where preventing the ingress of polluted air is desired; an overpressure valve to prevent the ingress of gases into smokeless areas. Description 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 SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS +76 AIR DISPLACEMENT UNITS Sizes All combinations of and according to the table of dimensions are possible. Non-standard dimensions are available on request. Installation Size JNŽ-6W (mm) (mm) n n number of vanes SUPPLY AIR NOZZLES 38 / B / +15 / B 1 38 EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 299

5 Pressure drop diagram: Pressure drop pcel (Pa) Iz diagr na pros A = ef Primer = 50 Q = 200 A ef = 50 v = (Q / Example of calculation for JNŽ-6W = 500 mm, = 400mm, n = 5 Q = 2000 m³/h A ef = 500 x ( (13 x 5)) = mm² 0.16 m² v = (Q / 3600) / A ef = (2000 / 3600) / 0.16 = 3.47 m/s Dp cel pressure drop Ordering example Air velocity (m/s) at the effective area A ef Primer n Žaluzija nastavlj Žaluzija nastavlj z vgradn Dimenz [tevilo k DP: Nas Opomb posebe Louvre for maintaining the preset pressure difference JNŽ-6W: JNŽ-6W/DP x Louvre for maintaining the preset pressure difference with installation frame JNŽ-6W/3: JNŽ-6W/3 x Dimensions: =500 =428 DP: Preset pressure difference Note: 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 = x (-10-(13 x n)) in m² where n is a number of vanes. 300