- November 8, 2023
Imen Datis Asia Co
Fire nozzle is an important equipment in firefighting and emergency rescue operations. This equipment is typically used by fire and rescue teams to perform firefighting and incident management tasks. Fire nozzle is a device connected to water lines or coolant supply lines such as fire monitors that is used to spray water, foam, powder and foam for fire suppression.
Fire nozzles come in a variety of designs, including spray nozzles, jet nozzles, and gun nozzles. Each type of nozzle has its own characteristics and applications. For example, spray nozzles are used to cover a wider area of a fire with water or coolant, while jet nozzles are used to send a powerful jet of water or coolant in a specific direction.
Fire hose nozzles can produce narrow or scattered streams, which allows the flow to be stopped without interrupting the power supply. The output of fire nozzles varies between 1 and 200 kilograms of extinguishing agent per second.
A distinction is made between hand-held nozzles (with outputs of less than 13 kg/s) and jack-type nozzles. Jack-type nozzles may be fixed, for example, attached to the roof of a vehicle, deck or lift platform, or they may be carried by some vehicles or by hand. Hand-held nozzles are used on fire engines, motor-driven pumps and hose stations inside buildings. Fire hose nozzles are connected to hose lines using quick-connect coupling heads.
Fire nozzles are an important part of firefighting equipment. The choice of the type of fire nozzle used by firefighters should be in accordance with the tactics and performance required. Before purchasing it, a needs assessment should be carried out to select the most suitable fire nozzle.
Nozzles are designed to help extinguish a fire by delivering the right amount of water, in the right shape, and in the right location. Nozzles have three main functions:
The size and diameter of the nozzle outlet orifice controls the flow.
The nozzle creates a restriction at the end of the water line that rapidly changes the water pressure. The velocity created allows access to deliver water where it is needed.
Different conditions require different methods of applying water or foam. Some conditions require the reach and penetration of a straight stream, while others require the heat absorption or radiant heat protection of a wide-angle mist spray.
Three-position fire hose reel couplings have the feature of spraying and throwing water in the form of powder and jet. The material used in the valve and lever of these nozzles is aluminum, but the pipe is made of two types of materials, which can be referred to as plastic and metal (aluminum) pipes. Fire hose reel couplings available in sizes 1 inch, 1.5 inches, 2 inches, and 2.5 inches.
The lightweight firefighting foam nozzle is used for high-expansion and mixed foams with a setting ratio between 40 and 75. Its features include lightness, high output flow rate, and speed. Suitable for spreading and dispersing foam on surfaces in fire operations. The operating pressure is 5 bar and the nozzles are made of steel.
Due to its long throw length, the heavy-duty foaming nozzle is used in cases where the firefighter is at a safe distance from the fire and is suitable for extinguishing solid and liquid fire objects, such as oil, grease, and grease.
These nozzles will perform better and higher in situations where the fire is caused by water-based liquids due to the use of special composite foams. The holes on the nozzle body suck in air and mix the foam with water, which exits the nozzle in the form of a powder or jet.
These types of nozzles are made of aluminum, steel, brass, and even plastic. Simple or so-called single-position nozzles have only one control knob for two positions, 0 and 1, or open and closed, which allows the water flow to be turned on and off.
The sizing of this type of nozzle ranges from 1/2 to 1 and 1/2.
The fire hose nozzle has the ability to spray water in powder and jet form. The water flow can be adjusted by a lever on top of the hose nozzle. Due to the high water output, the fire hose nozzle is mostly used when the distance between firefighters and the fire is large. The material used in the manufacture of this type of nozzle is aluminum.
These types of nozzles are made of aluminum, steel, brass, and even plastic. However, to withstand high pressure, resistant materials are used at the nozzle head and the end of the nozzle to connect to the main flow hose.
Gun nozzles, or so-called turbo nozzles, in addition to the feature of opening and closing the water flow and the ability to choose the type of water spray as a jet or powder, allow the operator to adjust the diameter of the particles. For this reason, when used, water droplets with finer particles exit the nozzle head, which turn into water vapor more quickly when fighting a fire and have a greater effect on the fire.
Also, due to the smaller diameter of the particles, they absorb oxygen faster when they hit the fire and also cool the fire faster. This type of nozzle is mostly used in fire trucks, industries and oil sites, and centers that have mobile water extinguishing systems.
Another example of a special fire nozzle is one that has high fire extinguishing and strong cooling capabilities. This nozzle sprays water into very fine powder-like particles (atomizer) and is used to extinguish fires in petroleum and paint materials and low or high voltage electrical installations. The fire spray nozzle or fire mist nozzle is about 120 centimeters long and weighs 3.5 kilograms. Its water output is 300 liters per minute with 5 bar pressure and 400 liters per minute with 8 bar pressure, which operates with a spray angle of 150 degrees and a throw distance of 9 to 11 meters.
When choosing a fire nozzle, it is important to choose the right type for your needs and application. The following guidelines will help you determine which type and size of nozzle is right for you.
A nozzle alone cannot produce the desired flow. The available water, pump capacity, hose location, etc. are factors that determine what flow a nozzle can provide. To determine the range of flow that can be achieved, the system needs to be analyzed.
Determine the maximum flow rate that can be achieved with typical engine and hose reel pressures. Determine the minimum flow required. Consider whether the nozzle will always be used on the same hose or whether different flows may be required in other applications.
The reaction force is determined by the GPM flow, nozzle pressure, and pattern. First, determine the maximum flow that can be controlled by the available manpower.
Decide whether a simple nozzle or a direct-flow mist nozzle is needed. Quality mist nozzles produce a good direct flow, about as good as a single-mode nozzle, but require a higher inlet pressure.
A quality fog nozzle at 100psi will perform about as well as a straight single-mode nozzle or a multi-purpose nozzle at 50psi. If the lower pressure performance of a fixed-mode nozzle combined with the straight-flow fog nozzle patterns best meets your needs, consider a multi-purpose fog nozzle or a compact solid-hole tip fog nozzle.
Fog nozzles are designed to create a dispersed stream to protect personnel. The teeth are designed to break the water into smaller droplets for better heat absorption and steam effect. The teeth are rotatable and adjustable, eliminating fingering which is especially important on LPG type fires, and they disperse the water well for heat absorption and steam conversion.
Determine whether it is necessary to change the flow rate during operation. If so, decide whether the nozzle operator or the pump operator should control the flow rate. If the nozzle operator is to control the flow rate, an adjustable nozzle may be the best choice. If the pump operator is to control the flow rate, a single-gallon (constant or variable pressure/variable flow), an automatic nozzle, or a multi-purpose nozzle will probably be the best choice.
Fire nozzle types are designed to withstand fairly harsh service, but some nozzles are more resistant to harsh conditions than others. If durability and service life are critical and maintenance and repair opportunities are limited, simple nozzles may be the best choice because the simplest nozzles are usually the toughest and most durable.
Various trainings on operation and maintenance should be provided to the pump operator and nozzle operator. Simple nozzles require the least amount of training for the pump operator and nozzle operator. The motor pressure depends mainly on the length and size of the hose. Single-gallon or variable pressure/flow nozzles require more training than simple nozzles.
Adjustable misting nozzles require additional training for the pump operator and nozzle operator because different motor pressures will be required for each flow setting with different hose lengths and sizes. Automatic/constant pressure misting nozzles also require additional training for the pump operator and nozzle operator. The pump operator must be trained to accurately control the motor pressure and flow with different hose lengths and sizes and different operating conditions. Multi-purpose nozzles require additional training for the nozzle operator because they must be trained to use the different types of flows they provide.
The price of fire nozzles is very diverse and is affected by various factors, including the type of nozzle selected, system characteristics, etc. Some of the factors that affect the price of these systems include: type of fire extinguishing system, type of fire extinguishing agent, etc.
You can contact our experts at Imen Datis Asia Company for more information on fire alarm and extinguishing systems and to inquire about product prices.
Automatic fire extinguishing systems include water mist fire extinguishing systems, vortex fire extinguishing systems, halon gas fire extinguishing systems (IG55, FM200, and NOVEC1230), water sprinkler fire extinguishing systems, aerosol fire extinguishing systems, and foam fire extinguishing systems.
Fire nozzles are made in different sizes and diameters, which determine the flow output. In general, dual-mode nozzles are suitable for less than 50 liters and gun nozzles for 100 to 800 liters. The type of use and application of the nozzles is an important point in choosing their size. If you want to use the nozzles to extinguish fires in large centers, it is better to use nozzles with a larger diameter.
1. Open the fire hydrant door, take out the fire hose and fire nozzle.
2. Check whether the fire hose and connector are in good condition. If they are damaged, they should not be used.
3. Point the fire hose towards the fire and avoid twisting.
4. Connect the fire hose with the fire hydrant, insert the connecting buckle accurately into the gutter and tighten it clockwise.
5. After the connection is completed, at least two operators hold the fire hose firmly and aim it at the water source (to avoid hurting people with high pressure, it is strictly forbidden to aim at people). Another operator slowly opens the fire hydrant valve and sprays at the root of the fire source to extinguish the fire until the fire is completely extinguished.
Imen Datis Asia Company, relying on up-to-date knowledge, continuous activity and cooperation with highly specialized forces, is now recognized as one of the leading private sector companies in the field of safety and firefighting industry. This company is always trying to continuously and dynamically play a role in expanding the safety and firefighting infrastructure of our beloved country of Iran and take great steps towards achieving goals such as the development and industrialization of new technologies.
Imen Datis Asia company, with expertise in supplying and equipping fire alarm and extinguishing systems, is a leader in providing quality products and specialized consultations. With an experienced team, we are trying to provide the highest level of security and protection to our customers.
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