Wolter (India) Sushant Lok, Gurugram, Haryana

Top panel and inlet panel can be changed, to allow 90deg or 180deg air flow. Twin-walled casing made of galvanized sheet steel. With insulation, low noise level, easy installation, can connection to DIN-standard tubes, forward curved impeller for higher pressure, screw topped for simple access to blower. made of reinforced with glass fibre Polyamide Panels made of galvanized sheet steel with inner sound absorbing mat of concealed mineral wool. The silent tube fans sizes 125-315M have multiple step motors. Therefore the speed can be changed by using a switch. Attention!.These motor must be mounted with horizontal shaft position!. The silent tube fans 315L - 400 are driven by a speed controllable external rotor motor, protection class IP 44 according to DIN 40050, insulation class B. Motor protection by thermical contact inserted into the winding.

Tube fans represent a technically perfect solution, uniting the advantages of the axial fan - straight airfl ow and easy installation - with the high pressure stability, low noise level and high effi ciency of the radial fan. The sizes RK 100 - 315 are equipped with an attractive, strong and heavily inflammable light grey plastic casing with integrated terminal box and guide vane. The casings of sizes RS 100-355 are powder coated sheet metal. Backwards curved radial impellers made of sheet steel or plastic. The impellers are fi tted directly onto the rotor of the external rotor motor. These units are balanced at two levels according to G 2.5 of DIN ISO 1940. Tube fans are driven by an external rotor motor, protection class IP 44, fitted in the radial impeller.

A well insulated housing keeps the noise level to a minimum. The impeller is driven by a standard flange type motor, single or 3-phase, mounted outside of the airstream. Motors suitable for speed control are also available. Impeller and motor are mounted on a swivel door. The impeller is easily dismounted for cleaning. The permissible temperature range of the conveyed medium is -30˚C to + 120˚C. WOLTER air extract boxes are fitted with either forward or backward curved impellers. Forward curved impellers are manufactured of galvanized sheet metal. Backward curved impellers are made of aluminium. Both impeller designs feature high efficiency and low noise characteristics. KAT - forward curved impeller with scroll. KAF - backward curved impeller without scroll.