What is flow rate in spray nozzle?
Many nozzle companies use a part number that describes the spray angle and flow rate at 40 PSI. For instance, a “6520” is usually a 65° angle flat fan nozzle flowing ~2 GPM at 40 PSI. In the example below, the flow rate at 150 PSI is calculated to be ~3.87 GPM.
What is difference between MVWS and HVWS?
A High Velocity Water Spray (HVWS) system is a water-based fire protection system that sprays water a high velocity – i.e. at a higher strength than a MVWS system. You would be forgiven for thinking that a HVWS system is strictly better than a MVWS system since the water pressure is higher.
What do the numbers on the nozzles mean?
Most companies identify their flat-fan nozzles with a four or five digit number (Figure 2). The first numbers are the spray angle and the other numbers signify the discharge rate at rated pressure. For example, an 8005 has an 80 degree spray angle and will apply 0.5 gallons per minute (GPM) at rated pressure of 40 psi.
How do I calculate my sprayer output?
Simply incorporate the output of a single nozzle in gallons per minute (GPM) and multiply by 5,940. Then divide by the product of miles per hour (MPH) times the distance between nozzles in inches (width) on the spray boom.
How do you calculate spray rate?
Multiply the length of the area you plan to spray times the width. If you are using metres, then divide the product by 10,000, which is the number of m2 in a hectare (ha). For feet and acres, divide by 43,560 which is the number of ft2 in an acre (ac):
What is MVWS?
An MVWS system (short for a Medium Velocity Water Spray System) is a water-based fire protection system. MVWS systems are used to provide cooling and/or control the burning in many large scale industrial applications, such as in thermal power plants.
What is Hvw spray system?
High Velocity Water Sprinkler System is used to protect equipments like transformers, circuit breakers, diesel engines and fuel oil storage tanks, turbo alternator lube oil systems and oil fired boilers.
What is the flow through a nozzle?
Flow nozzles The flow nozzle lies between the orifice plate and the venturimeter both in performance and cost. A typical section through a flow nozzle is shown in Figure 49.4 where pressure tappings are located immediately adjacent to the upstream and downstream faces of the nozzle (i.e. at points A and B).
Does a nozzle increase flow rate?
In fact, in the converging part of the nozzle, the flow speed increases, while the pressure, density, and temperature decrease. The flow speed attains its maximum, subsonic value at the throat of the nozzle, while the pressure, density, and pressure simultaneously attain minimum values.
How do you read a nozzle number?
In all cases the first two digits of the nozzle number indicate the spray angle (disperse) in degrees. EXAMPLE: 00 is 0 degree, 15 is 15 degree, 25 is 25 degree and 40 is 40 degree. The last two digits of the nozzle number indicate the orifice size, a standard industry designation.
How do you read a nozzle chart?
On a standard nozzle chart, the top column that runs left to right is the pressure that you want to obtain. The left column top to bottom is the nozzle orifice size designation. The top to bottom column next to the orifice size column indicates the actual orifice measurement.
What is Mulsifyre system?
Mulsifyre system is specially designed to rapidly and effectively douse any fire that breaks out in a transformer. It rapidly cools down the body of the transformer so that any explosion is averted.
What do teejet nozzle numbers mean?
These numbers refer to the flow rate in US gallons at the rated pressure of 40 PSI (approx. 3 BAR). For example, an 02 Nozzle is rated at 0.2 US gallons per hour at a pressure of 40 PSI. We use litres per minute but still that is the history of how the numbers came into being.
How do you read a pressure washer nozzle chart?
The color of the nozzle identifies the angle of the spray fan pattern measured in degrees and is generally the same across all sizes. Red is 0, Yellow 15, Green 25, and White 40. The black nozzle is used for applying soap at low pressure and is sometimes used for low pressure rinsing.
What is a medium velocity water spray nozzle?
As their name suggests, medium velocity water spray nozzles are designed to spray water at a medium velocity (i.e. the strength of the spray is weaker than HVWS systems). MVWS systems are best suited for protecting hazards involving light oils – where emulsification from high-velocity water sprayers (HVWS) is not possible.
What are the advantages of MV nozzles?
The water is uniformly distributed over the surface to be protected. MV Nozzles are effectively designed to apply water to exposed vertical, horizontal, curved and irregular shaped surfaces to allow cooling to prevent excessive absorption of heat from external fire and avoid structural damage or spread of fire.
What is the working principle of mvws system?
The sprayers shall discharge a cone of water spray consisting of medium size droplets of water. The water supply to the MVWS system shall consist of a network of open spray nozzles fitted with a special deflector to give the required angle of discharge for the water around the area to be protected.
What is the purpose of the water nozzles in fire protection systems?
The water is uniformly distributed over the surface to be protected. The Nozzles are effectively designed to apply water to exposed vertical, horizontal, curved and irregular shaped surfaces to allow cooling to prevent excessive absorption of heat from external fire and avoid structural damage or spread of fire.