A burner for a gas turbine, having a burner lance and/or burner hub, a burner passage which at least partially surrounds the burner lance and/or burner hub, and a fuel supply arrangement having at least one fuel nozzle and at least one fuel channel. The burner allows pollutant emissions to be reduced and offers a high degree of operational safety. The fuel supply arrangement has a fluidic oscillator that has an interaction chamber, the interaction chamber having at least one inlet and, lying opposite, one outlet region that has at least one outlet channel, one end of at least one feedback line terminating into the interaction chamber in the region of the inlet, the other end thereof terminating into the outlet region or into an outlet channel, and each end of the feedback line being sealed off from the interaction chamber by a flexible membrane.

A plural component spray gun (1) is designed for spraying quick setting materials such as foams, polyurea and the like. Towards this end, the gun (1) is designed so as to be easily serviceable with a minimum of tools. For example, the side seal cartridges (18) and (20) may be installed and removed without tools by removing the retaining ring (9) and then extracting them from the fluid housing (11). Those cartridges (18) and (20) are easily disassembled and cleaned. Similarly, the fluid housing (11) may be removed from the handle/body (1) by unscrewing the lock ring (7) by hand.

A vapor injection system and method of use thereof. The system including a fluid inlet in fluidic communication with a fluid reservoir, a voltage conditioner connected to a power source, where the voltage conditioner is configured to receive electrical energy from the power source, and transform the electrical energy, wherein transforming the electrical energy includes regulating voltage of the electrical energy and modifying frequency of the voltage, an iron core coil connected to the voltage conditioner, wherein the iron core is configured to transmit the transformed electrical energy from the voltage conditioner, a crystal compressor connected to the iron core coil and the fluid inlet, configured to: receive the transformed electrical energy from the iron core coil, receive the fluid from the fluid inlet, generate the vapor as a function of the transformed electrical energy and the fluid and output the vapor using a vapor outlet.