The VS is designed specifically for cleaning slag from furnace walls.  It does this by directing a high pressure cleaning medium (steam or air) through one opposing nozzle onto the furnace wall.  The screw tube delivers the nozzle into the furnace and then rotates the nozzles.  This provides two cleaning sweeps affectivity covering 100% of the target area. 

As with the RW series wall deslaggers, the VS is fully retracted from the furnace when not in use to protect the nozzle and screw tube from the high heat conditions found in the furnace.  These sootblower types are sometimes call short retracts. 

The VS can be used in negative pressure, positive pressure or balanced draft furnace conditions.  This is accomplished through the use of different style wallboxes with seal air and air capabilities.  The wallbox is welded to a wall sleeve, which mounts on the furnace wall and provides the penetration point. 

The standard VS is complete with wiring from limit switches and motor terminating in the electrical enclosure.  This electrical enclosure is also where the reversing motor starters would be installed for units with integral motor starters. Insertion and extraction push buttons are mounted in this enclosure for local operation.  Electrical options would include power and control voltage disconnect and explosion proof enclosures.

The required frequency of operation of the sootblowers will depend on many factors, such as the nature of the contamination, gas temperature, fuel, design parameters, etc. It is required to establish a cleaning cycle practice by checking the fouling of the heating surfaces visually, and monitoring gas temperatures and pressure changes. If the cleaning effect is not sufficient, the blowing frequency, and/or the blowing pressure, can be adjusted. In the event that certain areas are not sufficiently cleaned, those responsible sootblowers may be addressed individually. Since the sootblower’s blowing jets often have an are erosive effect if dust or ash is present, it is recommended that these surfaces be checked regularly for erosion. Blowing pressure should be reduced if damage is found.

The model RW-5E Furnace Wall Blower is designed for swivel tube travel of 12”. It is comprised of a cast steel steam chest, 2-3/8” O.D. Type 304 stainless steel swivel tube, chrome alloy nozzle head, cast steel head with external adjustable pressure control, one 0.6 H.P. traversing motor, one 0.07H.P. Rotary motor, limit switches and a NEMA 4 junction box. Included are a wall sleeve or adapter, mounting plate and an ANSI Standard companion flange with gasket, studs and nuts for the soot blower head. A metal cover is included to protect the drive rack, the guide rods, swivel tube and gear box.

Normal speed is: 5 seconds extending, 70 seconds blowing, and 5 seconds retracting. Optional speeds of 30 and 50 seconds blowing time are also available. A full 360º sweep is standard; however, limited sweep option is also available.

A standard RW-5E is complete with wiring from limit switches and motors terminating at terminal blocks in a NEMA 4 integrally mounted junction box. Also available is an integral cabinet of NEMA 4 construction containing motor starters. With this arrangement, the limit switches, motors and starters are shop wired to a disconnect-type terminal block mounted in the starter cabinet. Plug-in type disconnects are also available as well as other customer specified disconnects.