Automatic (Constant Pressure) Nozzle This is accomplished by a mechanism in the nozzle that automatically adjusts to an increase or decrease in flow to maintain pressure, and thus reach, fairly consistent. However, these nozzles can give you consistent reach while sacrificing flow.
What are the different types of fire nozzles?
- Smooth or solid bore.
- Fixed orifice or single gallonage (sometimes called variable pressure/variable flow)
- Selectable or adjustable gallonage.
- Automatic or constant pressure.
- Multi-purpose nozzle (combination smooth bore and fog)
What is a fire hose nozzle called? A fog nozzle is a firefighting hose spray nozzle that breaks its stream into small droplets.
What is the normal pressure head in the nozzle of the fire horse? The usual working pressure of a firehose can vary between 8 and 20 bar (800 and 2,000 kPa; 116 and 290 psi) while per the NFPA 1961 Fire Hose Standard, its bursting pressure is in excess of 110 bar.
What is the diameter of the fire hose nozzle?
| Material | Aluminium, Brass, Plastic |
|---|---|
| Size | 1/2 inch, 3/4 inch, 1/2 – 1 inch |
| Nozzle Diameter | 5-6 inch |
What is a Playpipe nozzle? The underwriter’s playpipe is a straight-stream nozzle that discharges water streams over long distances. Playpipes feature a remarkably smooth, long pipe—often 30 inches or so—that straightens a stream of water while reducing turbulence. Firefighters originally used playpipes as outdoor hose nozzles.
What is a constant pressure nozzle? – Related Questions
What is the fire nozzle?
A fire nozzle connects to a fire hose to deliver water or fire fighting foam to extinguish a fire. At Fire Product Search we care about your fire station’s or fire department’s fire fighting equipment and its ability to respond at short notice to the hazardous situations when fire fighting.
How does a fire hose nozzle work?
The pressure-control spring senses any increase or decrease in pressure within the nozzle. It then moves the baffle in or out to maintain a particular tip size necessary to keep the nozzle pressure at 100 psi. In effect, the nozzle is constantly changing tip size to match the water being supplied at that moment.
What is the purpose of a fog nozzle?
Spray from a fog nozzle is aimed at strategic areas of a burning room. The fog absorbs the heat generated by the fire and becomes steam, displacing the oxygen required by the fire and extinguishing the flame. A fog spray nozzle may be used indirectly or as a combination method of extinguishing fires.
What is Type 3 fire hose?
The Brigadier Type 3 layflat fire hose is principally used in the firefighting industry. However it is a multipurpose hose also commonly used within the shipboard and marine industry, on refineries and construction sites, in agriculture and irrigation, general industrial use and for all wash-down applications.
How much pressure is in a fire hose reel?
Maximum working pressure usually 12 bar so test pressure is typically 18 bar. Flow test – The flow rate of the water delivered by the hose is tested with a flow meter to ensure that it delivers water at the required rate.
How high can a fire hose reach?
How high can a fire hose shoot vertically? Between 75 feet and 100 feet straight up, depending on water pressure. In practice, though, firefighters on the ground rarely attempt to reach higher than 40 feet with hoses.
Why are fire hoses different colors?
The colors indicate the rated water-flow capacity of that particular hydrant: Red indicates a water-flow capacity of fewer than 500 gallons per minute (GPM). Orange indicates a water-flow capacity of 500 to 999 GPM. Green indicates a water-flow capacity of 1,000 to 1,499 GPM.
What are fire hose nozzles made of?
Fire hose nozzles are exclusively manufactured to discharge high pressure water stream through fire hoses. These nozzles are made from heavy duty water-resistant materials, such as aluminum, brass and polycarbonate.
How many types of fire hoses are there?
The three basic types of fire hose are single jacket, double jacket and rubber-covered lay-flat, but these are sometimes combined to create hoses for specific functions. Single jacket fire hoses has only a single layer of spun polyester fabric encasing the internal rubber hose.
What is psi in fire fighting?
PSI stands for pressure per square inch, and GPM stands for gallons per minute. Both of these are vital in helping you choose what kind of firefighting pump you need, and it is very important to know about the PSI and GPM before buying any pump, regardless of the use.
How do you calculate nozzle pressure?
How is nozzle pressure measured?
The nozzle pressure can be measured with a gauge placed on a nozzle body. Simply purchase a quality gauge and a threaded nozzle cap, combine the two and install in place of a nozzle. A pressure gauge threaded into a nozzle cap can measure boom pressure.
What is a fire hose valve?
What is a Fire Hose Valve? A hose or hydrant valve is used to control the flow of water at the scene of a fire or in an industrial setting. Different applications call for different fire hose valves, including deluge and dry riser valve types.
What is an automatic nozzle?
An automatic nozzle has a flushing mechanism built into it for flushing debris. Firefighters can flush an automatic nozzle by turning the nozzle all the way to full fog and going just a little further until the rotation stops. This puts the nozzle in the flush mode.
How many GPM is a master stream?
About the MASTER STREAM Series 150-1000 gpm, 300 – 1250 gpm, 300-2000 gpm, and 600 – 4000 gpm ranges are readily available based upon firefighting needs. Manual and electronic remote nozzles are available. Adjustable from straight stream to a dense fog pattern with a flow range of 150 gpm – 1000 gpm.
How much nozzle reaction can a firefighter handle?
Flowing the same gpm, there is a nozzle reaction difference of 21 pounds at 100 psi; at 150 gpm, the nozzle reaction of 76 pounds is at the working limit of two firefighters.
Does fog put out fire?
fog on fire, it will undoubtedly become the leading method in combating forest fires when and where water can be used. water from 212 degrees Fahrenheit into steam requires 8,000 BTUt s.
What is a combination fire nozzle?
Combination Fire Nozzle Types The automatic, or constant pressure, nozzle is designed to maintain a relatively constant pressure over a wide range of flows. The multi-purpose nozzle is a combination solid bore and fog nozzle, providing maximum reach and heat absorption.
What is a cellar nozzle?
The Cellar Nozzle has a ball-bearing revolving action for attacking fires in hard-to-reach places. The AF242 cellar fire nozzle has a 1-1/2″ rigid base with 6 variable angle orifices. Nozzle flows 95 GPM at 50 PSI; measures 3-1/2″ long.
What is a fire nozzle?
A fire nozzle connects to a fire hose to deliver water or fire fighting foam to extinguish a fire. At Fire Product Search we care about your fire station’s or fire department’s fire fighting equipment and its ability to respond at short notice to the hazardous situations when fire fighting.
What are the differences between a fog nozzle and a smooth bore?
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.
What is an automatic fire nozzle?
An automatic nozzle has a flushing mechanism built into it for flushing debris. Firefighters can flush an automatic nozzle by turning the nozzle all the way to full fog and going just a little further until the rotation stops. This puts the nozzle in the flush mode.
What is a combination fire nozzle?
Combination Fire Nozzle Types The automatic, or constant pressure, nozzle is designed to maintain a relatively constant pressure over a wide range of flows. The multi-purpose nozzle is a combination solid bore and fog nozzle, providing maximum reach and heat absorption.
