Long & Short Cased Axial Fans

LC/SC contents introduction features & benefits dimensional data silencer data additional Elta products

LC/SC Elta Fans Limited, being a key member of the Elta Group of companies, are recognised as a global supplier of high quality, engineered standard and bespoke Axial Flow fan products. Established for over 35 years, with manufacturing plants in the UK, Australia, Malaysia and South Africa and with extensive global distribution networks, Elta Fans has grown substantially over this period by employing the latest technology and manufacturing standards, underpinned by a vast knowledge of axial fan design.

We are able to meet applications requirements ranging from the simple wall mounted fan to ventilate a factory building or electrical sub-station to major applications including marine, traction, refrigeration, car park impulse and induction systems through to smoke control by pressurisation and extraction systems. Our Long Case (LC) and Short Case (SC) range of Axial Flow fan products are available in diameters from 315mm up to 2000mm with six hub sizes, alternative blade materials, ingle s or two speed motor combinations, single and three phase 50 or 60 Hz supplies. This allows us to offer the...

features & benefits • 160 standard size models. • Multiple impeller diameters; 315mm to 2000mm. • High aerodynamic efficiency. • A wide range of nominal speeds can be provided. • Standard speeds from 2 to 8 pole, alternative speeds including 2 speed options are available. • A wide range of impeller hub sizes and impeller blade combinations. • Numerous performance variations are available. • Minimum IP55 protection, others on application. • 220-240 Volts / 1 Phase - 50 & 60 Hz. • 220-240 / 380-415 Volts - 3 Phase 50 Hz. • 440-480 Volts - 3 Phase 60 Hz. • Other voltages are available on request....

flexible performance tested to the latest standards Fully adjustable aerofoil impellers in various alternative hub and blade arrangements to optimise air performance. LC/SC units are tested to ISO 5801:2007 (Airside performance) Installation Category D and to BS 848 Part 2:1985 (Sound performance) at Elta Fans own test facility for accurate, reliable and up-to-date performance and sound data. ease of installation The centrally mounted motor is connected via a flexible weatherproofed cable system to an externally located IP55 protected terminal box for long cased versions. quality assurance All...

specification casing quality management The all metal fan casing provides a very durable and robust construction. The fan casings are constructed from a heavy gauge mild sheet steel, rolled, spun flanged and fully welded, then hot dip galvanised to BS EN ISO 1461:2009 after fabrication. Both motors and axial impellers are mounted within the length of the casing on LC fans, while the motor body projects outside the casing on SC fans. Fans are designed and manufactured with procedures as defined in BS EN ISO 9001: 2008. Casings are also available manufactured from stainless steel. Mild steel casings...

performance data LC/SC units are tested to ISO 5801:2007 (Airside performance) Installation Category D and to BS 848 Part 2:1985 (Sound performance). Standard units operating at 50 Hz 50Hz - 2880 and 1440 r/min - 2 & 4 Pole 3000

Standard units operating at 60 Hz 60 Hz – 3500 and 1750 r/min - 2 & 4 Pole 4000

CASING TERMINAL BOX WITH ENTRY HOLE TO SUIT ØK METRIC GLAND FITTINGS MOTOR TERMINAL BOX WITH ENTRY HOLE TO SUIT ØK METRIC GLAND FITTINGS Product code Elta Fans Limited has a policy of continuous product development and improvement and therefore reserves the right to supply products which may differ from those illustrated and described in this publication. Confirmation of dimensions and data will be supplied on request. All dimensions are in mm.

Product code Motor frame size Elta Fans Limited has a policy of continuous product development and improvement and therefore reserves the right to supply products which may differ from those illustrated and described in this publication. Confirmation of dimensions and data will be supplied on request. All dimensions are in mm.

mounting dimensions Below are some typical examples of rigid and resiliently mounted installations. When using resilient mounting “flexible connections” are required between the fan casing and duct work. (see accessories page). Note! If a fan is mounted adjacent to vibration sources e.g. compressors and engines. A / V mounts and flexible connections must be used to avoid damage to motor bearings. rigid foot mounted - horizontal WHEN CEILING FIXING IS REQUIRED FEET MAY BE MOUNTED IN THIS POSITION resilient foot mounted - horizontal resilient & rigid mounted - vertical ANTI VIBRATION MOUNTING LONG...

Product code LCA Length

silencers Elta offer 2 types of cylindrical silencers as standard; Type ENP (without pod) and EP (with pod). construction Both types are rigidly constructed in galvanised sheet steel, with a highly absorbent sound attenuating lining between the outer casing and the inner perforated steel lining. The end faces of the silencer have a series of threaded holes for direct mounting to the LC/SC fan fixing flange/flexible collar. The EP (podded versions) will provide an improved level of attenuation. The inner acoustic pod is constructed from perforated steel sheet with a sound absorbent in-fill. Melinex...

Product Code POD FITTED TO EP TYPE ONLY Determining Silencer Attenuation End Reflection Values Fan Sizes To determine the sound level of a fan fitted with a silencer, the dynamic insertion loss should be subtracted from the dBW rating of the LC and SC fan across the octave band mid frequency spectrum. Insertion Loss @ Octave Band (Hz) 63 125 250 500 Note: This data is based on theoretical considerations only, and assumes The fan dBW ratings and silencer attenuation apply to in-duct operation, with a silencer connected between the fan and duct system. Where a silencer is connected directly to...