Profile: Delavan Spray Technologies specializes in spray nozzles for combustion applications from domestic heating to commercial boilers. We focus on assisting original equipment manufacturers in designing and specifying the best nozzles to fit their applications. The brass body and stainless steel metering parts permit machining to close tolerances for precision and consistently high performance. We offer Del-O-Flo® that uses a patented slot design consisting of very short slot length/depth ratio and substantially square slots to prevent plugging.