Quietflow SQT
Quietflow SQT

Quietflow SQT

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Quietflow SQT

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The Quietflow SQT...ECL incorporates the BAT (Best Available Technology) Vpro backward curved impeller, with three dimensional profiled blades powered by the ultra reliable Ziehl-Abegg EC (electronically commutated) external rotor motor. The range of acoustically treated in-line centrifugal twin fans are suitable for internal mounting, manufactured in galvanised steel with a natural finish. 

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FEATURES & BENEFITS

Learn more about individual features and benefits of our products.

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SPECIFICATION

The Quietflow SQT range of centrifugal fans as manufactured by Elta Fans Ltd.

 Technical information

TECHNICAL INFORMATION

The technical information available to you from ELTA Fans is exhaustive - Choose from either sound, performance and electrical or dimensional data for each and every product
Accessories

ACCESSORIES

Elta supply a full range of accessories for each of their products.

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SPP Features and Benefits
 

Features & Benefits

Design Appeal

Ideal for roof spaces and / or where space is at a premium.

Low Noise

Each unit is acoustically lined, therefore the breakout noise levels are low.

Ease of Installation

All models are designed for direct connection to standard diameter flexible or rigid circular ducting with 50 mm long spigots with EPDM rubber U shaped seals for ease of connection.

Performance

High efficiency low tonal noise backward curved centrifugal impellers are directly driven by an AC or EC external rotor motor, designed to be non overloading and provide high performance characteristics. 

Easy Maintenance

Top and bottom access to the fan and motor is by an easily removable panel for maintenance when required. 

Material Strength

A robust, yet lightweight unit with a galvanised sheet steel casing treated internally with a Class O rated (BS 476 Parts 6 and 7) fire resistant acoustic foam lining with a fire resistant polymeric coating. 

Reliability

Motor and Impeller manufactured by Ziehl-Abegg providing increased reliability.

Mounting

Each unit is supplied with integral mounting brackets.

Motor Protection

All SQT units have integral thermal overload protection which prevents the motor from overheating.

Tested To The Very Latest Standards

SQT units are tested to ISO 5801:2007 (airside performance) and to BS 848 Pt 2:1985 (sound performance) at Elta Fans own test facility, meaning accurate, up to date information on performance and noise data that can be relied upon.

Quality Assurance

All units are designed and manufactured with procedures as defined in BS EN ISO 9001: 2008.

Full Accessory Range

Speed controllers, fast clamps, anti-vibration mounts, silencers, panel filters, flexible connectors and auto-changeover panels.

 

 

SPP Specifications

Specification

The Quietflow SQT range of in-line twin fans as manufactured by Elta Fans Ltd. 46 Third Avenue, Pensnett Trading Estate, Kingswinford, West Midlands, DY6 7US, UK. Tel: +44 (0) 1384 275800 - If you need more information - Contact us.

Casing

The robust 1.2mm galvanised mild steel sheet casing, is treated internally with a Class O rated (BS 476 Parts 6 and 7) fire resistant acoustic foam lining with a fire resistant polymeric coating. The wrap around folded casing is specially manufactured using integral motor mounting plates to provide additional rigidity for the casings. Each casing provides a suitably sized circular spigot to suit the duct size required. EPDM (Ethylene Propylene) rubber U shaped seals (being ozone and UV stable) are used to ensure a good seal back to the duct that is to be attached. A removable lid is provided as a standard feature to facilitate ease of maintenance and cleaning.

The units have been constructed from mild steel, with mounting brackets as an integral component. Both motors and axial impellers mounted within the length of the unit casing.

All casing parts shall have a powder coated finish after manufacture, except the SAMF150/2-2 which has a die cast aluminium housing.

Motors

The twin range of units may have either an EC or AC twin rotor motor fitted as standard. The motor contains sealed for life bearings. Thermal Class of motors to THCL 130 or 155 dependent on size

Manufactured by Ziehl-Abegg providing increased reliability

All motors are suitable for use in ambient air conditions up to +60°C.

Impellers

High efficiency low tonal noise backward curved centrifugal impeller, dynamically balanced to Grade 6.3 and directly driven by the motor to provide a smooth airflow through the unit.

Quality Management

All units in the Elta range are designed and manufactured to procedures as defined in BS EN ISO 9001:2000.

They are also tested in accordance with BS848 Part 2 1985 (sound performance) and ISO 5801:2007 (airside performance).

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Technical Infomation

Dimensional Data

sqt dims
Product CodeABCDEFGWeightkg
SQT100 570 555 265 100 537 575 600 28
SQT125 570 555 265 125 537 575 600 28
SQT150 570 555 265 150 537 575 600 28
SQT200 607 657 305 200 569 667 702 36
SQT250 607 657 335 250 569 667 702 39
SQT315 755 869 405 315 702 889 914 60
SQT400 851 1024 477 400 700 1069 1119 89
SQT500 993 1259 606 500 800 1304 1354 128
 

Performance & Electrical Data

SINGLE Phase - 200V-277V / 50Hz / 60Hz 

EC Motors

Product CodeSpeed r/minAirflow SFPAirflow m³/s @ Static Pressure Pa.Overall Efficiency %FMEGMotor Electrical Data
0 25 50 75 100 150 200 250 300 350 400 500 FLC Amps Input kW
SQT100-1ECL 3467 m³/s 0.103 0.102 0.10 0.098 0.096 0.092 0.087 0.082 0.076 0.07 0.062 0.044 24 N43 1.23 0.14
W/(L/s) 1.26 1.29 1.32 1.36 1.39 1.47 1.56 1.66 1.78 1.92 2.1 2.76
SQT125-1ECL 3445 m³/s 0.123 0.121 0.118 0.115 0.112 0.106 0.1 0.092 0.084 0.075 0.065 0.037 24.3 N43 1.21 0.151
W/(L/s) 1.16 1.18 1.2 1.22 1.25 1.31 1.38 1.47 1.59 1.76 2.01 3.39
SQT150-1ECL 3450 m³/s 0.146 0.143 0.14 0.137 0.133 0.125 0.116 0.107 0.098 0.089 0.079 0.057 28.2 N47 1.17 0.134
W/(L/s) 0.91 0.93 0.94 0.96 0.99 1.05 1.12 1.22 1.35 1.49 1.68 2.31
SQT200-1ECL 3348 m³/s 0.274 0.267 0.261 0.254 0.248 0.235 0.221 0.208 0.194 0.179 0.164 0.13 32.8 N49 1.9 0.24
W/(L/s) 0.81 0.84 0.87 0.9 0.93 0.99 1.06 1.14 1.23 1.33 1.45 1.81
SQT250-1ECL 2390 m³/s 0.33 0.32 0.31 0.3 0.28 0.25 0.22 0.19 0.16 0.13 0.1 0.05 29.8 N48 1.89 0.223
W/(L/s) 0.58 0.6 0.62 0.65 0.67 0.75 0.85 0.99 1.19 1.48 1.97 4.18
SQT315-1ECL 2011 m³/s 0.63 0.61 0.6 0.59 0.58 0.55 0.52 0.49 0.45 0.41 0.36 0.22 42 N56 1.96 0.428
W/(L/s) 0.61 0.63 0.65 0.67 0.69 0.74 0.79 0.85 0.92 0.99 1.1 1.55
SQT400-1ECL 2201 m³/s 1.07 1.06 1.04 1.02 1 0.97 0.93 0.89 0.86 0.82 0.78 0.7 46.9 N57 4.25 0.914
W/(L/s) 0.8 0.82 0.83 0.85 0.87 0.9 0.94 0.98 1.02 1.07 1.12 1.25
SQT500-1ECL 1429 m³/s 1.45 1.42 1.39 1.36 1.33 1.25 1.17 1.09 1 0.91 0.82 0.62 49.1 N60 3.5 0.774
W/(L/s) 0.49 0.5 0.52 0.53 0.55 0.6 0.65 0.7 0.77 0.84 0.92 1.17

Overall total efficiency, r/min and FMEG values are per ISO 12759 installation category D. FLC @ 230V / 50Hz. A variable speed drive is integrated within the fan.

THREE Phase - 380V-480V / 50Hz / 60Hz

EC Motors

Product CodeSpeed r/minAirflow SFPAirflow m³/s @ Static Pressure Pa.Overall Efficiency %FMEGMotor Electrical Data
0 25 50 75 100 150 200 250 300 350 400 500 FLC Amps Input kW
SQT500-3ECL 1800 m³/s 1.82 1.8 1.77 1.75 1.73 1.68 1.63 1.57 1.51 1.45 1.39 1.27 51.8 N60 2.29 1.482
W/(L/s) 0.76 0.77 0.79 0.8 0.82 0.85 0.88 0.92 0.97 1.01 1.06 1.17

Overall total efficiency, r/min and FMEG values are per ISO 12759 installation category D. FLC @ 230V / 50Hz. A variable speed drive is integrated within the fan.

SINGLE Phase - 220V-240V / 50Hz

AC Motors

Product CodeSpeed r/minAirflow SFPAirflow m³/s @ Static Pressure Pa.Overall Efficiency %FMEGMotor Electrical Data
0 25 50 75 100 150 200 250 300 350 400 500 FLC Amps Input kW
SQT100-1ACL 2510 m³/s 0.075 0.073 0.07 0.067 0.063 0.055 0.046 0.035 0.02 14.1 N36 0.35 0.075
W/(L/s) 1 1.03 1.07 1.12 1.17 1.33 1.56 1.99 3.39
SQT125-1ACL 2517 m³/s 0.09 0.09 0.09 0.08 0.08 0.07 0.06 0.04 0.02 16.7 N39 0.35 0.076
W/(L/s) 0.81 0.83 0.86 0.89 0.94 1.07 1.28 1.65 3.18
SQT150-1ACL 2479 m³/s 0.111 0.107 0.103 0.098 0.093 0.081 0.065 0.046 0.022 18.7 N41 0.34 0..75
W/(L/s) 0.65 0.68 0.71 0.75 0.79 0.91 1.11 1.54 2.95
SQT200-1ACL 2543 m³/s 0.22 0.21 0.2 0.2 0.19 0.17 0.15 0.13 0.11 0.09 0.06 22.6 N41 0.68 0.155
W/(L/s) 0.67 0.7 0.73 0.77 0.81 0.9 1.01 1.16 1.37 1.71 2.45
SQT250-1ACL 2424 m³/s 0.33 0.32 0.31 0.29 0.28 0.25 0.23 0.2 0.17 0.14 0.1 0.04 23.8 N41 0.96 0.22
W/(L/s) 0.64 0.66 0.69 0.72 0.76 0.85 0.96 1.1 1.29 1.56 1.97 3.94
SQT315-1ACL 1263 m³/s 0.4 0.38 0.36 0.33 0.3 0.23 0.14 0.03 22.5 N41 0.75 0.159
W/(L/s) 0.39 0.41 0.44 0.48 0.53 0.69 1.04 4.25
SQT400-1ACL 1379 m³/s 0.71 0.68 0.66 0.63 0.59 0.51 0.43 0.35 0.25 0.05 31.5 N47 1.48 0.299
W/(L/s) 0.38 0.39 0.42 0.44 0.48 0.56 0.67 0.81 1.09 4.6
SQT500-1ACL 1214 m³/s 1.23 1.19 1.14 1.09 1.05 0.95 0.85 0.74 0.63 0.5 0.36 0.05 30.5 N43 2.94 0.649
W/(L/s) 0.5 0.51 0.54 0.56 0.59 0.65 0.74 0.85 1.01 1.26 1.69 11.1

Overall total efficiency, r/min and FMEG values are per ISO 12759 installation category D.

Sound Data

SINGLE Phase - 220V-277V / 50Hz / 60Hz

EC Motors

Product Code  Sound Power Level dBW @ Octave Band HzdBA @ 3m
63Hz 125Hz 250Hz 500Hz 1 kHz 2 kHz 4 kHz 8 kHz
SQT100-1ECL Inlet 75 79 74 68 55 51 45 41 49
Outlet 78 75 72 67 60 51 48 45 48
Breakout 59 59 61 58 55 51 45 42 40
SQT125-1ECL Inlet 82 74 74 71 58 52 47 49 50
Outlet 80 75 78 70 64 53 49 49 52
Breakout 54 58 64 62 57 51 43 40 42
SQT150-1ECL Inlet 85 74 73 71 58 54 51 52 50
Outlet 84 77 75 69 62 54 52 53 50
Breakout 59 60 66 63 57 51 46 45 43
SQT200-1ECL Inlet 80 77 79 75 63 59 56 55 54
Outlet 87 83 79 73 64 58 55 55 54
Breakout 63 66 70 69 62 57 50 41 48
SQT250-1ECL Inlet 78 73 75 70 59 54 53 51 50
Outlet 79 75 77 67 60 57 53 51 50
Breakout 60 63 71 63 56 49 42 37 44
SQT315-1ECL Inlet 75 73 78 69 53 55 50 48 51
Outlet 77 74 77 70 59 55 52 49 51
Breakout 66 67 74 65 58 52 46 40 47
SQT400-1ECL Inlet 81 77 87 71 66 62 59 58 58
Outlet 82 78 80 77 69 65 62 59 57
Breakout 73 72 79 71 67 61 54 47 53
SQT500-1ECL Inlet 77 84 75 64 59 57 53 52 51
Outlet 78 82 73 71 62 57 54 50 51
Breakout 73 79 73 69 61 54 47 42 50

Tests and preparation of the sound data have been carried out in accordance with BS 848 Part 2:1985 at 50% peak pressure. The In-Duct Sound Power Level Spectra are in dB re-1pW. The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only.

THREE Phase - 380V-415V / 50Hz

EC Motors

Product Code Sound Power Level dBW @ Octave Band HzdBA @ 3m
63Hz 125Hz 250Hz 500Hz 1 k Hz 2 kHz 4 kHz 8 kHz
SQT500-3ECL Inlet 81 84 86 72 66 65 62 56 58
Outlet 82 83 83 77 69 65 62 56 58
Breakout 77 80 81 75 68 61 54 49 56

Tests and preparation of the sound data have been carried out in accordance with BS 848 Part 2:1985 at 50% peak pressure. The Sound Power Level Spectra are in dB re-1pW.The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only.

SINGLE Phase - 220V-240V / 50Hz

AC Motors

Product Code  Sound Power Level dBW @ Octave Band HzdBA @ 3m
63Hz 125Hz 250Hz 500Hz 1 kHz 2 kHz 4 kHz 8 kHz
SQT100-1ACL Inlet 62 68 65 58 46 42 38 33 39
Outlet 72 69 67 59 51 43 38 30 41
Breakout 51 54 60 51 48 42 36 29 34
SQT125-1ACL Inlet 67 68 66 62 48 44 38 37 41
Outlet 74 67 69 58 51 43 40 39 42
Breakout 45 54 60 53 51 44 40 37 36
SQT150-1ACL Inlet 68 65 68 62 50 46 41 39 42
Outlet 76 69 75 59 52 45 43 41 46
Breakout 51 53 60 53 49 42 34 26 35
SQT200-1ACL Inlet 79 72 74 67 55 51 47 44 48
Outlet 77 75 72 68 57 52 49 49 48
Breakout 57 62 66 61 55 49 44 41 42
SQT250-1ACL Inlet 77 73 78 70 59 54 53 53 51
Outlet 77 76 74 68 61 57 53 52 49
Breakout 61 63 70 63 57 48 41 38 44
SQT315-1ACL Inlet 66 74 62 53 42 41 37 28 39
Outlet 69 75 57 57 46 41 37 33 40
Breakout 58 69 58 54 47 39 31 26 36
SQT400-1ACL Inlet 73 76 72 59 49 50 47 40 45
Outlet 75 80 67 63 54 50 48 43 46
Breakout 61 68 65 56 50 45 40 35 39
SQT500-1ACL Inlet 75 78 72 60 54 52 49 49 46
Outlet 75 80 70 67 58 53 50 46 48
Breakout 70 76 70 65 58 52 45 41 46

Tests and preparation of the sound data have been carried out in accordance with BS 848 Part 2:1985 at 50% peak pressure. The In-Duct Sound Power Level Spectra are in dB re-1pW. The overall A-weighted sound pressure level is at a distance of 3m with spherical free-field propagation. It is expressed in dB re-20µPa and is presented for comparative purposes only.

Silencer Data

SINGLE Phase - 200V-277V / 50Hz / 60Hz

EC Motors

Product Code dBA Attenuation
300L 600L 900L 1200L
SQT100-1ECL Inlet -8 -13 -18 -20
Outlet -10 -14 -20 -22
SQT125-1ECL Inlet -10 -14 -19 -22
Outlet -9 -14 -19 -22
SQT150-1ECL Inlet -9 -13 -16 -19
Outlet -8 -12 -15 -18
SQT200-1ECL Inlet -9 -13 -17 -20
Outlet -7 -10 -14 -17
SQT250-1ECL Inlet -8 -12 -14 -17
Outlet -7 -11 -13 -16
SQT315-1ECL Inlet -7 -9 -11 -15
Outlet -8 -10 -12 -15
SQT400-1ECL Inlet -5 -8 -10 -13
Outlet -8 -11 -13 -16

SINGLE Phase - 200V-277V / 50Hz / 60Hz

EC Motors

Product Code dBA Attenuation
1DENP 2DENP
SQT500-1ECL Inlet -6 -10
Outlet -7 -12

THREE Phase - 380V-415V / 50Hz

EC Motors

Product Code dBA Attenuation
1DENP 2DENP
SQT500-3ECL Inlet -6 -12
Outlet -7 -13

SINGLE Phase - 220V-240V / 50Hz

AC Motors

Product CodedBA Attenuation
300L 600L 900L 1200L
SQT100-ACL Inlet -9 -14 -19 -21
Outlet -9 -13 -19 -21
SQT125-ACL Inlet -9 -14 -19 -22
Outlet -8 -12 -17 -20
SQT150-ACL Inlet -8 -14 -17 -19
Outlet -6 -12 -15 -17
SQT200-ACL Inlet -7 -11 -15 -18
Outlet -8 -12 -15 -18
SQT250-ACL Inlet -7 -12 -14 -17
Outlet -8 -11 -14 -16
SQT315-ACL Inlet -4 -6 -8 -10
Outlet -5 -7 -9 -11
SQT400-ACL Inlet -4 -6 -8 -11
Outlet -4 -6 -8 -10

SINGLE Phase - 220V-240V / 50Hz

AC Motors

Product Code dBA Attenuation
1DENP 2DENP
SQT500-ACL Inlet -6 -10
Outlet -7 -11

Wiring Data

SINGLE Phase - 20V-200V / 50Hz / 60Hz

EC Motors

Product CodeWiring Diagram No.
SQT100-1ECL 152-000236
SQT125-1ECL 152-000236
SQT150-1ECL 152-000236
SQT200-1ECL 152-000236
SQT250-1ECL 152-000236
SQT315-1ECL 152-000244
SQT400-1ECL 152-000244
SQT500-1ECL 152-000244

SINGLE Phase - 220V-240V / 50Hz

AC Motors

Product CodeWiring Diagram No.
SQT100-1ACL 152-2177
SQT125-1ACL 152-2177
SQT200-1ACL 152-2177
SQT250-1ACL 152-2177
SQT315-1ACL 152-2177
SQT400-1ACL 152-2177
SQT500-1ACL 152-2177

THREE Phase - 380V-480V / 50Hz / 60Hz

EC Motors

Product CodeWiring Diagram No.
SQT500-3ECL 152-2MOEA03K3*

* Please contact Elta Fans for more information.

Accessories

  • Fast Clamps (018)

    For quick connection of spigotted fans to circular duct or accessories

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  • Silencers (068-JF)

    Pre-galvanised sheet steel with perforated steel lining

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  • Silencers (068-D**P)

    Pre-galvanised sheet steel with perforated steel lining

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  • Av Mounts (Rubber)

    Spring AV mounts - zinc plated steel, rubber insert and foot pad

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  • Flexible Connectors (018)

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  • Panel Filters (018)

    Filter access with removable panel

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  • Electric Heater Batteries

    Safe and clean heating

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  • Auto Changeover Panels

    Auto Changeover Panels

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