Foam Proportion: Pressure Foam Ratio of Mixer

The ratio of balanced foam mixing device is affected by many aspects, such as brand, category, specification, market, etc. Before choosing to buy, it is necessary to understand and compare in many aspects. The mixing process of the foam mixture is pressurized by the foam liquid pump, which is injected into the proportional mixer after the foam liquid pump is pressurized, and then injected into the proportional mixer after adjustment through the balance valve.

When the water in the main pipeline has different working conditions due to the change of pressure and flow, it ensures that the foam mixture with a more accurate mixing ratio is continuously configured during the operation of the device, and the foam generating equipment is supplied with qualified foam for effective fire extinguishing operations. If you want to know more about the balanced foam proportional mixing device, you can consult the new fire safety equipment in Henan Province, welcome to visit the factory!

The pressure foam proportional mixer is used in the ZP32 foam water sprinkler automatic fire extinguishing system, low multiple foam fire extinguishing system, and water film-forming foam sprinkler fire extinguishing system, which is composed of water inlet pipe, liquid outlet pipe, mixing chamber, diffusion pipe, etc. The mixing chamber of the proportional mixer is cast with arrows indicating the flow direction. During installation, the tail end of the arrow should be connected with the outlet pipe of the water pump, the arrow end should be connected with the foam main pipe, and the water inlet pipe and outlet pipe should be connected with the foam liquid storage tank respectively.

Working principle: The proportional mixer mainly uses the Venturi principle, when the pressurized water passes through the proportional mixer, a negative pressure is generated between its interior and the foam liquid storage tank.

The force difference makes the foam liquid in the storage tank enter the proportional mixer through the foam liquid pipe connected with the proportional mixer, and the foam liquid flow is controlled in the connecting pipe.

The amount of the orifice plate forms a foam-water mixture with a stable mixing ratio.

Foam proportional mixer, foam generating device.

Summary. Foam fire truck foam proportional mixing device is the main equipment to absorb and transport foam liquid in the air foam fire extinguishing system, it can mix foam and water in proportion, generally there are three mixing ratios.

In addition to 3 percent and 6 percent foam proportional mixers, there are:

The foam proportional mixing device of the fire truck is the main equipment for absorbing and transporting the foam liquid in the air foam fire extinguishing system, which can be called dry to mix the foam and water in proportion, and there are generally three mixing ratios.

It is necessary to mix water and foam, and the mixing device is called the foam proportional mixer.

When to use 3%, and when to use 6% and 9%.

At present, the Huzhenchong foam proportional mixer produced in China is mainly based on 6% foam liquid, and the mixer is generally divided into three specifications: PH32, PH48 and PH64. Trousers annihilation brigade bend.

The ratio of foam to water for fire trucks is generally 250 kg of foam liquid added to one ton of water, according to the parameters of the low-multiple foam fire extinguishing system.

Is it qualified? The proportion of ENB foam is generally 3% 6%, and the amount of compressed air foam concentrate is only 1 10 of ordinary foam liquid. Air foam is a kind of foam that can be mixed with water and washed through mechanical methods, and is often used as a mechanical foam fire extinguishing agent.

Summary. The automatic foam proportional mixer is an efficient, reliable and precise control equipment, which can achieve effective proportional mixing, accurate and efficient operation, faster and more economical maintenance and maintenance. However, manual foam proportional mixers often have inaccurate proportions, inconvenient operation, low efficiency, poor safety and reliability, long operation time, need to be regularly maintained and maintained, and the cost is high.

Automatic foam proportional mixer is an efficient, reliable and precise control equipment, which can quietly achieve effective proportional mixing, accurate and efficient operation, faster penetration and more economical maintenance and maintenance. However, the manual foam proportional mixer often has inaccurate proportions, inconvenient operation, low efficiency and ridge transportation rate, poor safety and reliability, long operation time, regular maintenance and maintenance, and high cost.

Could it be a little more comprehensive?

Please notice what my question is, my main question is the noisy foam oak fire truck automatic foam proportional mixer compared to the manual foam proportional mixer, what are the advantages of the automatic foam proportional mixer? What are the disadvantages of the manual bubble beam touching foam proportional mixer? Please be detailed.

I hope you can give me more comprehensive details, thank you!

Compared with the manual foam proportional mixer, the advantage of the automatic foam proportional mixer is that it can automatically mix the leakage according to the proportion of different environmental factors, which can better realize the fire fighting effect and improve the fire extinguishing efficiency to a greater extent; The disadvantage of the manual foam proportional mixer is that the operator needs to adjust the mixing ratio according to the environmental conditions at that time and the proportion that does not return to the same, which requires the operator to have certain technical ability, which increases the difficulty of operation and is prone to misoperation.

Answer]: a, b

Negative pressure type ring pump type Bilu Zhen example mixer and pipeline type coarse foam proportion mixer; Positive pressure type of pressure foam ratio Zen sock mixer and balanced pressure type foam ratio mixer.

Is the balanced foam proportional mixing device pre-mixed or ready-to-mix! Hello, glad to answer for you. Balanced foam proportional mixing device is now mixed 1 fixed system, balancing, mechanical pumping, capsule pressure proportional mixing device or pump direct injection proportional mixing process should be selected, the mixing ratio type should be consistent with the selected foam liquid, and the mixing ratio shall not be less than the rated value; 2. For fixed roof storage tanks, external floating roof storage tanks, and internal floating roof storage tanks with a single tank capacity of not less than 5000m, balanced or mechanical pump-in proportional mixing devices should be selected; 3. For the fully submerged high-multiples foam fire extinguishing system or the multiple, high-multiples foam fire extinguishing system in local applications, the mechanical pump-in, balanced or capsule pressure proportional mixing device shall be selected; 4. The foam-water sprinkler system with equal or similar flow rate of foam mixture in each zone should adopt the proportional mixing process of direct pump injection; 5. The foam spray system of the oil-immersed transformer can be equipped with a capsule pressure proportional mixing device.

When the balanced proportional mixing device is adopted, the following provisions shall be met: 1. The inlet pressure of the foam liquid of the balance valve shall be greater than the water inlet pressure, and the pressure difference shall meet the requirements of the product; 2. A one-way valve should be set on the foam liquid inlet pipeline of the proportional mixer; 3. Flushing and venting facilities should be provided on the foam liquid pipeline. When a mechanically pumped proportional mixing device is used, the following provisions shall be complied with:

1. A one-way valve should be set on the inlet pipeline of the foam liquid; 2. Flushing and venting facilities should be provided on the foam liquid pipeline. When the proportional mixing process of direct injection of the pump is adopted, the following provisions shall be met: 1. The foam flow pressure at the foam liquid injection point shall be clear or greater than the water flow pressure; 2. A one-way valve should be set on the foam liquid inlet pipeline; 3. Flushing and venting facilities should be provided on the foam liquid pipeline. When using a capsule pressure proportional mixing device, the following provisions should be complied with:

1. The volume of a single tank of the foam liquid storage tank should not be greater than 5m; 2 The inner capsule should be made of rubber suitable for storing the foam liquid and should be marked with a service life. When the semi-stationary or mobile system adopts the pipeline proportional mixer, the following provisions shall be met: 1. The water inlet pressure of the proportional mixer shall be within the range, and the outlet pressure shall meet the inlet pressure requirements of the foam generating device; 2 The pressure loss of the proportional mixer can be calculated as 35% of the water inlet pressure.

Hope mine can help you! Do you have any other questions?

In addition to 3 percent and 6 percent foam proportional mixers, there are:

Hello, according to your question, "In addition to 3 percent and 6 percent of the foam ratio mixer, there are also "I will answer it for you", and there are 12 percent, and the most commonly used ones are 3 percent and 6 percent. The foam proportional mixer is the "nerve center" of the foam fire extinguishing system, and its working performance is directly related to the success or failure of the foam fire extinguishing system. There are types of foam proportional mixers, such as pressure air foam proportional mixer, ring pump foam proportional mixer, pipeline foam proportional mixer, etc.

The foam fire extinguishing system has the characteristics of safety and reliability, economy and practicality, and high fire extinguishing efficiency, especially for fighting Class B fires, and is the basic way to fight reed lead fires in domestic and foreign oil sections. <>

1) Installation requirements:When installing, the direction of the foam proportional mixer (device) should be consistent with the direction of the liquid flow. All kinds of foam proportional mixers (devices) have installation directions, and there are marks on them, so they cannot be installed in reverse during installation, otherwise the liquid letter will not be able to absorb the foam liquid or the pump will not be able to pump into the foam liquid, so that the system can not extinguish the fire.

Therefore, special attention should be paid to the direction of the late wheel injection and the direction of the liquid flow must be consistent during installation.

The installation of the connection between the foam proportional mixer (device) and the pipeline should be tight, and there should be no leakage, otherwise, the mixing ratio will be affected.

2) Detection method: observation and inspectionThe first item is mainly to observe and inspect during commissioning, because only when the pipeline is filled with liquid can it be observed whether there is leakage at the connection.

The configuration of foam concrete is as follows:

Cement: generally 300kg-600kg, which is related to the bulk density of the design. Generally, the bulk density of the roof is 350kg, the minimum cement is 300kg, the indoor cushion bulk density is 400-600kg, and the cement is 350kg-550kg

Fly ash: The amount of fly ash should not exceed 40%, otherwise the strength of the finished foam concrete is not good.

Foaming agent: the dosage is different according to the performance of each manufacturer.