Technical Documentation LTG High Performance Axial Fans LTG High Performance Centrifugal Fans

LTG High Performance Axial Flow and Depending on application, a fan is required to satisfy a variety of requirements. Selection criteria may include the following: - Required flow rate - Overall external pressure - Power requirement - Space required - Possible control techniques Given that there is no such thing as an all-purpose fan which combines all these criteria to the optimum extent, LTG has developed a variety of types, with the result that a suitable fan is available to resolve any airflow problem. Centrifugal FansThe 10-point Programme for economical Fans1 Optimum aerodynamic characteristics...

LTG High Performance Axial Flow Fan Series VAN The low pressure axial flow fan type VAN is a high performance fan with aerodynamically optimized characteristics. Impellers are equipped with ten curved blades with laminar profiles complying with the NACA 16 series. Eight sizes Maximum total pressure: 1,200 Pa In standard configuration, VAN-type fans are equipped with an outlet guide vane system, to which the characteristic curves contained in this document also apply. The theoretical characteristic flow data at the maximum degree of efficiency are as follows: © LTG Aktiengesellschaft ■ GrenzstraUe...

LTG High Performance Axial Flow Fan Series VAN Special Characteristics Special Configurations High flow rates, even with the smaller sizes, permitting use in centralized locations with limited space. Impeller and shaft balanced in two planes (static and dynamic) to quality stage Q 2.5 of VDI 2060. Overall, the fan complies with quality stage Q 6.3 of VDI 2060, including bearing play etc. Direct drive, intake or discharge side. Sealed, separately ventilated impeller bearings for air temperatures above approx. 80_C. Special corrosion proofing options: sand-blasting, hot galvanizing, rubberizing,...

LTG High Performance Axial Flow Fan Series VAH The high pressure axial-flow fan type VAH is a high performance fan with aerodynamically optimized characteristics. Impellers are equipped with twelve curved blades with laminar profiles complying with the NACA 16 series. Seven sizes Maximum total pressure: 3,300 Pa All VAH-type fans are equipped with an outlet guide vane, to which the characteristic curves contained in this document also apply. The theoretical characteristic flow data at the maximum degree of efficiency are as follows: © LTG Aktiengesellschaft ■ GrenzstraUe 7 ■ 70435 Stuttgart ■...

LTG High Performance Axial Flow Fan Series VAH Special Characteristics Special Configurations Use is recommended for high volume flow rates and pressures up to 3,300 Pa. Impeller and shaft balanced in two planes (static and dynamic) to quality stage Q 2.5 of VDI 2060. Overall, the fan complies with quality stage Q 6.3 of VDI 2060, including bearing play etc. Sealed, separately ventilated impeller bearings for air temperatures above approx. 80_C. Special corrosion proofing options: sand-blasting, hot galvanizing, rubberizing, stainless steel. Standard Configurations With or without diffuser. Horizontal...

LTG High Performance Axial Flow Fan Series VAR The VAR type fan with direct drive and adjustable impeller blades (when stationary) is a high performance axial flow fan with aerodynamically optimized characteristics. Flow rates: up to 270,000 m3/h Maximum total pressure: 2 300 Pa Fan Design, Construction Type Special Characteristics Direct drive through unilateral wheel bearing on the squirrel-cage standard motor's shaft, positioned on the suction side on a bearing support welded to the casing. This drive type allows operation of the fan at speeds determined by choice of the standard motor: n1...

LTG High Performance Axial Flow Fan Series VARDimensions Fan VAR (shown with inlet nozzle) Guide Wheel VAR Size © LTG Aktiengesellschaft ■ GrenzstralJe 7 ■ 70435 Stuttgart ■ Germany VAN/VAH/VAR/VRK/VRS-eng-TP (01/14) Printed in Germany ■ Former editions are invalid ■ Subject to technical modifications page 8 of 16

LTG High Performance Axial Flow Fan Series VARDesign Range without guide wheel, without diffuser with guide wheel, without diffuser © LTG Aktiengesellschaft ■ GrenzstraUe 7 ■ 70435 Stuttgart ■ Germany VAN/VAH/VAR/VRK/VRS-eng-TP (01/14) Printed in Germany ■ Former editions are invalid ■ Subject to technical modifications page 9 of 16

LTG High Performance Axial Flow Fan Series VAR Design Range with guide wheel, with diffuser Flow rate V [m3/s] Tot. pressure difference ptot [Pa] characteristics-overview design limitefficiency  © LTG Aktiengesellschaft · Grenzstraße 7 · 70435 Stuttgart · Germany VAN / VAH / VAR / VRK / VRS-eng-TP (01/14) Tel. +49 (711) 8201-0 · Fax +49 (711) 8201-696 · [email protected] · www.LTG-AG.com Printed in Germany · Former editions are invalid · Subject to technical modifications

LTG High Performance Centrifugal Fan Quadrovent Series VRK With single or double sided intakes, 12 sizes each. Centrifugal fans of small to medium size, housing and impeller of welded construction. Welded impeller with backward curved blades. Flow rates: Maximum total pressure: Nominal sizes: Optimum degree of efficiency: Degree of efficiency with unrestricted discharge: V-belt or flat-belt drive. Low dynamic pressure loss, hence saving on motor output of approx. 25% by comparison with drum rotors; approx. only 5% more motor power required by comparison with high performance fans producing 75%...

LTG High Performance Centrifugal Fan Quadrovent Series VRK Housings Design Range The overview diagram shows the range of applications for type VRK fans. This will serve as a preliminary guide to selecting the size of fan required. VRKe single sided intake RD 0 VRKd double sided intake VRKd double sided intake Overview Diagram Nominal size [x103m3/h] [m3/s] Flow rate V (single sided intake) © LTG Aktiengesellschaft · Grenzstraße 7 · 70435 Stuttgart · Germany VAN / VAH / VAR / VRK / VRS-eng-TP (01/14) Tel. +49 (711) 8201-0 · Fax +49 (711) 8201-696 · [email protected] · www.LTG-AG.com Printed in Germany...