What is a selectable Gallonage nozzle?
Protek’s Selectable Gallonage Nozzles are combination pattern nozzles with versatile multiple flow settings. The unique stainless steel teeth produce a wide range of patterns from straight stream to full fog. Inlet size is available in 1″ (25 mm), 1-1/2″ (38 mm) or 2-1/2″ (65 mm).
What is a variable flow nozzle?
The Variable Flow Nozzle is a 2″ NPT threaded nozzle that is designed to work in counter flow cooling towers. The spring loaded design allows the orifice of the nozzle to adjust based on the pressure being supplied to the nozzle.
At what pressure do you pump a combination nozzle?
Many combination handline nozzles operate at 50 or 75 psi. Manufacturers also make mid- and low-pressure foam equipment.
What is a constant Gallonage nozzle?
The constant gallonage nozzle is the simplest of these nozzles because it has a fixed orifice that is rated for a predetermined gallons per minute (gpm) at a standard nozzle pressure. This means that its rated pounds per square inch (psi) will produce a predetermined volume of water.
What is a fixed Gallonage nozzle?
Fixed gallonage A nozzle that provides constant gallonage with an adjustable pattern of spray from straight stream to wide fog. Benefits: Easy to use; operates in a wide range of nozzle pressures from 50 to 100 psi.
How is PDP calculated?
- PDP = NP + FL.
- Nozzle Pressure [NP]
- FL = C Q.
Why does FDNY use smooth bore nozzles?
Often referred to as “the staple of American fire service,” smooth bore nozzles produce the greatest reach/gpm combination compared to other nozzle types. Smooth bore nozzles also use the lowest engine pump pressures, allowing for maximum reach.
What is a fog nozzle firefighter?
By. Firefighter Nation Content Directors. 2.29.2020. Facebook.
What is an advantage of a smoothbore nozzle?
Smooth bore nozzles outperform fog nozzles in that they have more operational benefits, which include: greater reach and better penetration. less nozzle reaction except for the 50-psi fog nozzle. less likelihood of being clogged by debris.
How do you find the PDP of a cylinder?
Round or Cylindrical Container To calculate, measure around the bottle (the circumference) and the height of the bottle, not including the slope at the top (called the “shoulder”). Multiply the two, and you get the total of the entire surface. Multiply by 40% (. 40) and you have the PDP.
When do you need fixed gallonage fire nozzle?
For instance, he said, a city department might want to flow 150 gallons per minute (gpm) to attack a structure fire and accept that kind of flow for all kinds of fires it encounters. “In that case a fixed-gallonage nozzle is what they need,” he noted.
What’s the difference between automatic and single gallon nozzles?
Like the single gallonage nozzle, some of today’s adjustable gallonage nozzles can provide quality patterns even at reduced nozzle pressures. An automatic nozzle is designed to maintain a relatively constant pressure over a wide range of flows.
What are the NFPA standards for spray nozzles?
The NFPA standard provides general guidelines on how nozzles must perform. For example, he said, a spray nozzle must have a discharge pattern, flow a minimum of 60 gallons per minute, have capabilities of going from straight stream to a wide fog pattern, and have minimum angles at which the fog pattern should flow.
Why is the constant gallonage nozzle the simplest?
The constant gallonage nozzle is the simplest of these nozzles because it has a fixed orifice that is rated for a predetermined gallons per minute (gpm) at a standard nozzle pressure. This means that its rated pounds per square inch (psi) will produce a predetermined volume of water.