Aspirating Nozzle Meaning

Aqueous film forming foam concentrates afff can be applied to flammable liquid fires using either aspirating or nonaspirating discharge devices.

Gas burner nozzle price. Found 0 sentences matching phrase non aspirating nozzlefound in 1 ms. Verb to draw a fluid under negative pressure into a receptacle for transport to the lab eg syringe or analysis as in a lab instrument that aspirates material being tested on a batch analyser. Most commonly found on foam extinguishers and foam handlines.

Probably the most important characteristic attributed to foam as a primary extinguishing agent is its ability to seal a fuel surface after the fire is out. Swirl nozzles inject the liquid in tangentially and it spirals into the center and then exits through the central hole. To the left the nozzle size and corresponding operating pressures are now visible.

Non aspirating nozzle in english translation and definition non aspirating nozzle dictionary english english online. For an air induced nozzle the range is usually from 30 to 90 psi so the middle is 60 to 70 psi. The difference between the two is simply that the aspirating device mixes or entrains air in the afffwater solution within the nozzle or foam maker whereas nonaspirating devices do not.

Fire tests on gasoline compared several commercial nozzles aspirating and nonaspirating revealing significant difference in the extinguishment of large fires. A narrow piece attached to the end of a tube so that the liquid or air that comes out can be. Air aspirating nozzle uses an opening in the cone shaped nozzle to inject air into a stream of water based foam cafsaffffffp to make the concentrate foam up.

Due to the vortexing this causes the spray to come out in a cone shape. Air aspirating nozzles are designed to optimize this foem solution conversion. Try to operate at a spray pressure thats in the middle of the nozzles operating range.

Nozzle flow rate chart with volumes at top makes it user friendly. A new variable stream nonaspirating nozzle was tested and by comparison found to be marginally acceptable. They are a low energy system meaning that the only energy available to produce bubbles in the nozzle.

Self aspirating full jet fog nozzle bpna model monitor nozzles are designed with an internal built in mixer to suck and mix the pure foam concentrate into the water while gathering all features of the bpn nozzles possible to change the discharge pattern of the nozzle as desired. The use of nonaspirating nozzles for effective application of aqueous film forming foam is almost a controversial topic.