What is a Spray Lance for Reactor-Ready Vessels (RR171700)? What is a Spray Lance for Reactor-Ready Vessels (RR171700)? When used with a Reactor-Ready Filter Vessel, the spray lance allows for washing of the filter cake after filtration with minimal surface disturbance. The RR171700 Spray Lance for Reactor-Ready Vessels include the following components: RR171701 PTFE Right Angle Tubing Adapter – 8mm Hose Barb RR171702 PTFE Lance Shaft – 300mm x 12mm RR171703 PTFE 15° Angled Adapter for Spray Nozzle RR171704 SS Spray Nozzle – Hollow Cone RR171705 B34 12mm PTFE Compression Fitting