Systems for Tunnel Ventilation
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Systems for Tunnel Ventilation Heavy-duty industrial centrifugal fans Compact industrial centrifugal fans Axial fans Plug fans Smoke extraction fans

VST Jet Fans Road Tunnels Rail Tunnels and Metro Systems Equipped with the DLK system the VST range of fans is the perfect choice for rail tunnels and metro systems. The piston effect of tight fitting trains in tunnels and the resulting pressure transients present arduous and difficult conditions for the ventilation fans. VST is designed to withstand these conditions and the DLK system will ensure stable flow conditions at all times. VST can be used in both supply and extract air conditions. Designed and proved for elevated temperature conditions, VST meets the requirements for fan...

Tunnel Ventilation Systems Ventilation System Types Tunnels play an important part in the global development of infrastructures and urban communications. Safety aspects and air quality criteria put special demands on the tunnel ventilation systems in new projects and are important reasons for the current upgrading of existing tunnel systems. There are three main types of vehicular tunnels: road tunnels, subway tunnels (Metros) and rail tunnels. The electro-mechanical tunnel installations in coordination form the basis of an effective traffic system and a safe tunnel environment for...

Tunnel Ventilation Methods Longitudinal ventilation: In its most basic configuration the air flow moves from the tunnel entrance portal to the exit portal within the main tunnel cross section area, without separate ventilation ducts along the tunnel. The restriction in fresh air only from the entrance area involves, for a tunnel with vehicular emissions, a pronounced increase in pollutant concentration and exposure as a function of distance when travelling through the tunnel. For longer longitudinally ventilation tunnels this system therefore must be supplemented by central exhaust/supply...

Longitudinal ventilation by jet fans (VST) supplemented by central exhaust- and supply fans (VST) in ventilation shafts Transverse ventilation Semi-transverse ventilation Exhaust system. 5

VST Jet Fans Dimension sheet Test standards and procedures Performance The VST is tested for performance following the international standard ISO/TC 117/150/DIS 13350.0 (draft). All tests have been carried out at the DLK Technical Centre with its DIN registered fan laboratory. The performance and efficiency of a jet fan is defined and tested as thrust (N) and motor power input (kW). The efficiency is defined as the ratio between thrust and motor shaft power. The base fan with inlet/outlet bell mouths as well as with silencers has been tested as one unit. Measurements are made under free...

2 VST 560- 7-2 630- 7-2 710- 7-2 800- 7-4 800- 7-2 900- 7-4 1000- 7-4 1120- 7-4 1250- 7-4 1400- 7-4 1600- 7-4 1800 2000 Air density(kg/m3) 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 Voltage (V/Hz) 400V/ 50Hz 400V/ 50Hz 400V/ 50Hz 400V/ 50Hz 400V/ 50Hz 400V/ 50Hz 400V/ 50Hz 400V/ 50Hz 400V/ 50Hz 400V/ 50HZ 400V/ 50Hz Volumeflow(m3s) 7.3 10.0 14.4 10.1 21 14.3 20 27.5 39 55 81 Discharge area (m2) 0.25 0.31 0.39 0.50 0.50 0.64 0.79 1.0 1.24 1.54 2 Exitspeed. (m/s) 29 36.3 36.3 20.2 42 22.4 25.3 27.9 31 36 40.3 Absorbed power(kW) 5.8 10.2 17.8 3.7 31 6.6 11.2 20.2 33 58 112 Motorpower(kW) 7.5...

24h SERVICE for fan units – worldwide. Service-hotline: fon +49(0)2161- 968 184 fax +49(0)2161- 968 307 service@pollrich.com Our service-team is available for you around-the-clock - Technical advice - Assembly - Commissioning - Performance tests - Noise and vibration measurements - Inspection - Preventative maintenance - Maintenance and repair - Electronic balancing - System optimisation [DE] DLK Ventilatoren GmbH Ziegeleistraße 18 D-74214 Schöntal-Berlichingen fon +49(0) 7943 - 9102 - 0 fax +49(0) 7943 - 9102 - 10 info@dlk.com [DE] Pollrich Ventilatoren GmbH Neusser Straße 172 D-41065...