Steam Treated Stems (STS) is a technique for expanding cut tobacco stems. The Discharge Hood, Infeed Hood, Rotary Airlock, Process Pipe Work etc. can all be accessed from the integral Access Platform. The platform incorporates interlocked, Hinged Floor Plates which provide access to the Post Expansion Chamber/Tube for removal and cleaning. All the Process Pipe Work is contained within the chassis and is clear of the underside of the Chassis for ease of transport/installation.