Instantaneous or flash steam boilers

Child Classifications

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• F22B 27/02 built-up from fire tubes
• F22B 27/04 built-up from water tubes (F22B27/12 - F22B27/16 take precedence)
• F22B 27/12 built-up from rotary heat-exchange elements, e.g. from tube assemblies
• F22B 27/14 built-up from heat-exchange elements arranged within a confined chamber having heat-retaining walls
• F22B 27/16 involving spray nozzles for sprinkling or injecting water particles on to or into hot heat-exchange elements, e.g. into tubes