Backdraught Damper. Duct Width. Duct Height. Elevation Page 36 DESCRIPTION

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1 SPECIFICATION DESCRIPTION The damper casing is formed from 3.0 mm thick sheet steel into a rigid channel section to ensure proper alignment of blades and shafts. Where circular dampers are required, additional spigot adaptors are used which increase the damper insertion length from to 300 mm. The blades are a formed single-skin of 1.5 mm sheet steel and seal against a flame retardant PVC strip attached to the blades and top and bottom stops. Continuous shafts Ø 9.5 mm. Parallel action linkage consisting of drive levers and bosses connected by flat bar link bars, driven through stainless steel pins. All linkage is contained within the depth of the casing. The type CBD-01 Backdraught Damper has been designed to give maximum efficiency under arduous conditions and is suitable for fitting with the air flow in one direction only. The dampers may be installed vertically or horizontally with the air flow upwards. Direction Of airflow 70 Backdraught Damper Phosphor bronze self lubricated Oilite flanged bushes. Materials can be stainless steel, galvanized mild steel or other materials to suit the clients specific requirements. Earth continuity bosses. Lifting lugs. Flame retardant PVC blade seals. Integral or removable enclosures for housing control equipment. High temperature bearings. Shaft seals to provide airtight casings. Other variations to suit clients specific requirements are also available. Duct Height End Elevation Duct Width Section Elevation Page 36

2 INSTALLATION AND ASSEMBLY LEAKAGE CHARACTERISTIC CURVE Backdraught Damper An approved sealant should be inserted between the damper and duct flange to ensure a good seal. Typical Installation Leakage m³/sec x Static Pressure N/m² OPEN PRESSURE DROP CHARACTERISTIC CURVE The static pressure drop curve - face velocity characteristic was conducted with free blades without spring or weight assistance or loading. Multiple Assemblies 250 Max. module size 1mm x 0mm Max. multiple assembly 2500mm x 0mm Standard depth mm ΔP N/m² Mullion 100mm wide vertical member Face Velocity m/sec. (Based on duct area) Page 37

3 SPECIFICATION DESCRIPTION The damper casing is formed from 3.0 mm thick sheet steel into a rigid channel section to ensure proper alignment of blades and shafts. Where circular dampers are required, additional spigot adaptors are used which increase the damper insertion length from 350 to 450 mm. The blades are a formed single-skin of 1.5 mm sheet steel and seal against a flame retardant PVC strip attached to the blades and top and bottom stops. Continuous shafts Ø 9.5 mm. Parallel action linkage consisting of drive levers and bosses connected by flat bar link bars, driven through stainless steel pins. All linkage is contained within the depth of the casing. Phosphor bronze self lubricated Oilite flanged bushes. The type CBD-02 Backdraught Damper has been designed to give maximum shut-off under back-flow conditions and is suitable for fitting with the air flow in one direction only. The dampers may be installed vertically or horizontally with the air flow upwards. Direction Of airflow Backdraught Damper Materials can be stainless steel, galvanized mild steel or other materials to suit the clients specific requirements. Earth continuity bosses. Lifting lugs. Flame retardant PVC blade seals. Integral or removable enclosures for housing control equipment. High temperature bearings. Shaft seals to provide airtight casings Other variations to suit clients specific requirements are also available. Section Duct Width End Elevation Duct Height Elevation Page 38

4 Backdraught Damper INSTALLATION AND ASSEMBLY An approved sealant should be inserted between The damper and duct flange to ensure a good seal. Typical Installation Leakage m³/hour LEAKAGE CHARACTERISTIC CURVE 1000 x x x Static Pressure N/m² OPEN PRESSURE DROP CHARACTERISTIC CURVE Multiple Assemblies Max. module size 1mm x 2500mm Max. multiple assembly 2450mm x 2500mm ΔP N/m² Standard depth 350mm Page 39 Mullion 100mm wide vertical member Face Velocity m/sec. (Based on duct area)

5 FLAMGARD Engineering Ltd. PONTNEWYNYDD INDUSTRIAL ESTATE PONTYPOOL TORFAEN NP4 6YW TEL (01495) FAX (01495) WORKS ORDER SERIAL No. TAG No. DUCT SIZE EQUIPMENT TYPE WEIGHT P.O. No. FIRE RATING ATEX CERTIFICATE No. CBD - 02 N/A F L A MG A R D C L A I D A I R Kgs. SPECIFICATION The damper casing is formed from 3.0 mm thick sheet steel into a rigid drum, stiffened at either end with flange rings to ensure proper alignment of the blade and shaft. The blades are a formed single-skin of 1.2 mm sheet steel and close against stops welded round the inside of the casing. The blades are bolted to the square shafts. Continuous shafts 12.7 mm square. Phosphor bronze self lubricated Oilite flanged bushes. Materials can be stainless steel, galvanized mild steel or other materials to suit the clients specific requirements. Earth continuity bosses. Lifting lugs. Flame retardant PVC blade seals. High temperature bearings. Shaft seals to provide airtight casings. Other variations to suit clients specific requirements are also available. DESCRIPTION The type CBD-02C Circular Backdraught Damper has been designed to give maximum shut-off under back-flow conditions and is suitable for fitting with the air flow in one direction only. The dampers may be installed vertically or horizontally with the air flow upwards. FLOW 300 Section CLEARANCE End Elevation Circular Backdraught Damper DUCT DIAMETER Elevation Page 40

6 Circular Backdraught Damper INSTALLATION AND ASSEMBLY An approved sealant should be inserted between The damper and duct flange to ensure a good seal. Typical Installation Leakage m³/hr LEAKAGE CHARACTERISTIC CURVE Ø Static Pressure N/m² OPEN PRESSURE DROP CHARACTERISTIC CURVE 350 ΔP N/m² Ø Page Face Velocity m/sec. (Based on duct area)

7 SPECIFICATION DESCRIPTION The damper casing is formed from 3.0 mm thick sheet steel into a rigid channel section to ensure proper alignment of blades and shafts. Where circular dampers are required, additional spigot adaptors are used which increase the damper insertion length from to 300 mm. The blades are a formed single-skin of 1.5 mm sheet steel and seal against a flame retardant PVC strip attached to the blades and top and bottom stops. Continuous shafts Ø 9.5 mm. Parallel action linkage consisting of drive levers and bosses connected by flat bar link bars, driven through stainless steel pins. All linkage is contained within the depth of the casing. Phosphor bronze self lubricated Oilite flanged bushes. Operation The type CPR-01 Pressure Relief Damper has been designed to give maximum efficiency under arduous conditions and is suitable for the air outlets of electrical equipment rooms, control rooms and living quarters. These areas are maintained at a higher pressure than surrounding areas to prevent the ingress of hazardous gases. The differential pressure is usually 63 N/m² although this may be increased to provide a greater safety margin. The dampers may be installed vertically or horizontally with the airflow upward. Direction Of airflow 70 Pressure Relief Damper Spring adjustment unit End Elevation Section Materials can be stainless steel, galvanized mild steel or other materials to suit the clients specific requirements. Earth continuity bosses. Lifting lugs. Flame retardant PVC blade seals. Integral or removable enclosures for housing control equipment. High temperature bearings. Shaft seals to provide airtight casings. Other variations to suit clients specific requirements are also available. Duct Height Duct Width Elevation Page 42

8 Pressure Relief Damper INSTALLATION AND ASSEMBLY An approved sealant should be inserted between The damper and duct flange to ensure a good seal. Typical Installation Leakage m³/sec LEAKAGE CHARACTERISTIC CURVE 460 x Static Pressure N/m² OPEN PRESSURE DROP CHARACTERISTIC CURVE Multiple Assemblies Max. module size 1mm x 0mm Max. multiple assembly 2500mm x 0mm Standard depth mm ΔP N/m² The static pressure drop curve - face velocity characteristic was conducted with free blades without spring or weight assistance or loading Page 43 Mullion 100mm wide vertical member Face Velocity m/sec. (Based on duct area)