The working pressure of high-pressure water mist nozzles is generally greater than 3.5Mpa. There are two types of appearance structures: open type and closed type. Under the minimum working pressure, the high-pressure water mist nozzle can form droplets with a diameter of Dv0.5 less than 200μm and Dv0.99 less than 400μm on a plane 1m downward from the axis. It can effectively put out fires, control fires and reduce losses.

High pressure water mist nozzle model:

The model naming of high-pressure water mist nozzles generally consists of category, product code, feature code, main parameters, custom code, etc. Generally, the model of high-pressure water mist nozzle is represented by XSW (category)-T (feature code)-main parameters, for example

1. Conventional model of open high-pressure water mist nozzle: XSW-T0.7/10, where XSW represents the fine water mist nozzle, T represents the special response nozzle, 0.7 represents the flow coefficient, and 10 represents the minimum working pressure.

2. Conventional model of closed high-pressure water mist nozzle: XSW-T1.0/10-57℃φ2, where

The following is the parameter table of open and closed conventional models of high-pressure water mist nozzles:

1. Commonly used open type high-pressure water mist nozzle model parameter table:

2. Commonly used closed high-pressure water mist nozzle model parameter table:

High pressure water mist nozzle price:

Open structure unit price: 100 yuan/piece

Closed structure unit price: 200 yuan/piece

Lanzhong Electromechanical has the ability to design and produce various forms of nozzles, and can customize the structural type, flow coefficient and material according to customer needs. We will quote based on the design and production difficulty of the nozzle as well as the order quantity, and provide wholesale supply. Large quantity and good price. Welcome to buy!

High pressure water mist nozzle type:

There are two common types of high-pressure water mist nozzles: open nozzles and closed nozzles. These two types of nozzles have three conventional types in appearance and structure: A series ordinary frame (the nozzle core is embedded in the nozzle housing); B series protruding perforated frame (the nozzle core protrudes); and C series direct frame.

The difference between open sprinklers and closed sprinklers is:

1. A closed nozzle is a normally closed nozzle. The temperature sensing and locking device of the nozzle will only fall off and open the nozzle under a predetermined temperature environment. Therefore, in the event of a fire, this nozzle will only be turned on to extinguish the fire if it is in the flame or near the fire source.

2. The open sprinkler head does not have a temperature sensing and locking device and is in a normally open state. When a fire occurs, all the open sprinkler heads in the system protection area where the fire is located will emit water together to extinguish the fire.

Principle of high-pressure water mist sprinkler fire extinguishing:

Principle: The high-pressure water mist fire extinguishing nozzle uses a high-pressure nozzle to atomize water droplets through the high-pressure nozzle. After the mist droplets are scattered, they are cooled and suffocated in a wide range, thereby achieving the purpose of extinguishing the fire.

Advantages: High-pressure water mist does not have conductivity after being atomized by high-pressure nozzles. Pure water is used as the fire extinguishing medium, which is non-polluting and non-corrosive to the equipment that needs to be protected. It can extinguish Class A, B and electrical fires.

Applications: libraries, archives, subway stations, power grids, shopping malls, transformers, communication rooms and other places

High-pressure water mist nozzle installation specifications:

1. Installation specifications for open high-pressure water mist nozzles

① The installation arrangement should be able to confirm that the fine water mist nozzles spray evenly and cover the protected area, and should comply with the following regulations:

a. During construction, the distance between the installation of high-pressure water mist nozzles and the wall should not be greater than 1/2 of the maximum layout spacing of nozzles;

b. The distance between the open high-pressure water mist nozzle and other obstructions should be confirmed to ensure that the obstruction does not affect the normal spraying of fine water mist by the nozzle; when it cannot be avoided, compensatory measures should be taken;

c. For cable tunnels or mezzanines during construction, the nozzles should be arranged at the upper part of the cable tunnel or mezzanine, and the fine water mist should be able to cover the entire cable or cable bridge.

② For open systems that use local application, the nozzle arrangement should be able to confirm that the fine water mist envelopes or covers the protected object. The distance between the fine water mist nozzle and the protected object should not be less than 0.5m. When used to protect oil-immersed transformers, the layout of the sprinkler heads should comply with the following construction regulations:

a. When the height of the transformer exceeds 4m, the sprinkler heads should be arranged in layers;

b. When the distance between the cooler and the transformer body exceeds 0.7m, a nozzle should be added in the gap;

c. The nozzle should not be directly aimed at the high-voltage inlet casing;

d. When an oil collection pit is installed below the transformer, the installation arrangement of the fine water mist nozzles should be such that the fine water mist covers the oil collection pit.

2. Installation specifications for closed high-pressure water mist nozzles

The nozzle layout of the high-pressure water mist closed system should ensure that the fine water mist is sprayed evenly and covers the protected area, and should comply with the following regulations:

a. The distance between the sprinkler head and the wall should not be greater than 1/2 of the maximum layout spacing of the sprinkler head;

b. The distance between the sprinkler head and other obstructions should be confirmed to ensure that the obstruction does not affect the normal spraying of fine water mist by the sprinkler head. When this cannot be avoided, compensatory measures should be taken;

c. The distance between the temperature-sensing component of the nozzle and the ceiling or the bottom of the beam should not be less than 75mm and should not be greater than 150mm. When a suspended ceiling is installed in the venue, the sprinkler head can be placed close to the suspended ceiling.