Performance and characteristics of explosion proof flame retardant breathing valve

The all-weather explosion-proof shell is made of cast steel and aluminum alloy, which has good corrosion resistance; The corrugated fire retardant layer is made of stainless steel, which has good fire retardant performance and corrosion resistance; The structure is simple, easy to maintain, safe and convenient.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Summary. Flame arrester breathing valve refers to breathing valve and flame arrester, breathing valve and flame arrester and supporting use, can also be used separately.

The main slag of the breathing valve is composed of a valve seat, a valve cover, a protective cover and two sets of opening and closing devices controlled by vacuum and pressure. The opening and closing device includes valve disc, guide rod, spring, spring seat filial piety and sealing ring, etc. When the pressure in the tank reaches the rated positive exhalation pressure, the pressure valve is opened, and the steam in the tank is discharged; When the vacuum in the tank reaches the rated suction negative pressure, the vacuum valve disc opens and air enters.

Flame arrester breathing valve refers to breathing valve and flame arrester, breathing valve and flame arrester and supporting use, can also be used separately.

The breathing valve is considered from the pressure aspect, and the flame arrester is considered from the fire protection aspect.

1) The breathing valve should be installed at the highest point of the gas source of the hail silver storage tank to reduce the evaporation loss of the material and smoothly provide the most direct and largest passage to the breathing valve. Usually for vertical tanks, the breathing valve should be installed as far as possible within the top of the tank, and for the tank top storage tank that needs to be insulated, it can be installed near the ladder platform;

2) When two breathing valves need to be installed, they should be arranged symmetrically with the center of the tank top;

3) If the breathing valve is used on the nitrogen-sealing tank, the pipe position of the nitrogen gas supply pipe should be far away from the breathing valve interface, and inserted into the storage tank about 200mm from the top of the tank, so that the nitrogen will not be directly discharged after entering the tank, so as to achieve the purpose of blanketing.

The explosion-proof flame retardant breathing valve is a product that combines the breathing valve and the flame arrester, and its principle is to add the explosion-proof flame-retardant corrugated disc, the core component of the flame arrester, at the respiratory mouth of the breathing valve. Its function is consistent with the function of the breathing valve, which can ensure the safety performance of the storage tank while playing the function of the breathing valve.

Explosion-proof flame retardant breathing valve is a safe and energy-saving product to maintain the air pressure balance of the storage tank and reduce the volatilization of the medium, the explosion-proof flame retardant breathing valve makes full use of the pressure bearing capacity of the storage tank itself to reduce the medium discharge, and its principle is to use the weight of the positive and negative pressure valve disc to control the positive pressure of the exhaust and the negative suction pressure of the tank. When the pressure of the medium in the tank is within the range of the controlled and controlled operating pressure of the explosion-proof fire-retardant breathing valve, the explosion-proof flame-retardant breathing valve does not work to maintain the tightness of the oil tank; When the medium is added to the tank, the pressure of the upper gas space in the tank is increased, and the positive pressure of the explosion-proof fire-retardant breathing valve is reached, the pressure valve is opened, and the gas escapes from the exhalation port of the explosion-proof fire-retardant breathing valve, so that the pressure in the tank does not continue to increase; When the medium is withdrawn to the outside of the tank, the pressure of the upper gas space in the tank drops, and the negative pressure of the explosion-proof fire-retardant breathing valve is reached, the atmosphere outside the tank will open the negative pressure valve disc of the explosion-proof fire-retardant breathing valve, so that the outside gas enters the tank, so that the pressure in the tank rock lifting bureau does not continue to fall, so that the air pressure inside the tank and outside the tank is balanced, so as to protect the safety device of the storage tank, and the exhaled and inhaled gas needs to pass through the explosion-proof fire-retardant corrugation, which can prevent the fire source from entering the storage tank.

The explosion-proof flame retardant breathing valve integrates the flame arrester and the breathing valve, and its novel structure is the first in China. It is a new type of safety equipment necessary for petrochemical storage tanks, and its biggest advantages are good fire retardant breathing performance, light weight and easy maintenance.

The working principle of explosion-proof flame retardant breathing valve is to use a spring limit valve plate, which is determined by positive and negative pressure, or exhale or inhale. The breathing valve should have two functions: positive pressure and negative pressure, specifically: when the container is subjected to positive pressure, the breathing valve opens the exhaled air to release positive pressure; When the container is subjected to negative pressure, the flame retardant breathing valve opens the inhalation gas to release the negative pressure.

This ensures that the pressure is within a certain range and the container is safe.

The anti-aging and explosion-resistant fire retardant breathing valve is suitable for storing Class A oil with an inner point of less than 28 and Class B oil with a flash point of less than 60, such as gasoline, benzene, toluene, coal oil, light diesel oil, engine oil, ** and other oil products and chemical products with the same nature, and it works normally in a temperature environment of -35 -60.

In order to use the breathing valve safely, the corrugated flame retardant layer should be removed and cleaned regularly within 3-6 months to ensure that each hole on the fire barrier layer is unblocked, prevent blockage, and ensure safe and normal use. Regularly check whether the positive and negative valve disc movements of the ventilation air are flexible, and whether the contact sealing surface of the guide rod and valve disc is damaged, and if there is damage, it should be replaced immediately. When inspecting, maintaining, and reinstalling, it should be ensured that the joint surfaces in the valve are tightly matched and the valve disc can be lifted flexibly.

When the new valve is activated, the shock shield between the valve discs should be removed before installation, otherwise the breathing valve will fail.