| ： Product name : || Flameproof ventilating cap || ： Product model : || FZT-1 |
| ： Driving method : || Manual || ： Product attributes : || Tank accessories |
| ： Applicable medium : || Light oil || ： Sealing material : || Teflon |
| ： Pressure range : || ： Nominal diameter : || DN100, DN150 |
| ： Common materials : || Aluminum alloy || ： Technical consultation : || 021-31007323 |
是国内著名〖 FZT-1型阻火通气帽 〗制造商，也是国内大型【 阻火器 】生产商之一，公司自成立以来始终围绕客户的需求并持续创新，为广大的代理商和企业客户提供〖FZT-1型阻火通气帽 〗解决方案，质量可靠，价格实惠，故畅销全国各地，欢迎新老客户来电，来函，我们将为您提供最优质的服务。 Hushan Valve Manufacturing (Shanghai) Co., Ltd. is a well-known domestic manufacturer of FZT-1 fire-blocking ventilating caps and one of the large domestic manufacturers of [ fire-blockers ]. Since its establishment, the company has always focused on customer needs and continued innovation. To provide our agents and corporate customers with the "FZT-1 fire resistance vent cap" solution, reliable quality and affordable price, it sells all over the country, welcome new and old customers to call us, email us, we will provide you with the best service .
First, the introduction of FZT-1 fire blocking vent cap 是用来阻止氢气火焰向外蔓延的安全装置。 The fire blocking vent cap is a safety device used to prevent the hydrogen flame from spreading outward. It consists of a solid material (fire-resistant element) with many small channels or gaps that can pass through the gas. 阻火器 后，被阻火元件分成许多细小的火焰流，由于传热作用（气体被冷却）和器壁效应，火焰流猝灭。 It is required that the gap or channel of the flame arresting element is as small as possible, so when the flame enters the flame arrester , the flame arresting element is divided into many small flame streams. The flame stream is quenched due to heat transfer (gas is cooled) and wall effect.
主要性能 Fourth, the main performance of FZT-1 fire blocking vent cap
Weight (㎏ / set)
FZT-1 fire blocking vent cap
是用于城市工矿企业、加油站，装设于储罐（或泵输送量不大于25m2/n的轻质油品水型油罐上）的重要配件。 Fire blocking vent cap is an important accessory used in urban industrial and mining enterprises, gas stations, and installed in storage tanks (or light oil water tanks with a pump capacity of 25m2 / n or less).
Various quick connectors of FZT-1 fire blocking vent cap
防爆阻火呼吸阀 性能合格,连续13次阻爆性能试验每次均能阻火。 1. The performance of explosion-proof and fire -resistance breathing valve is qualified, and 13 times of explosion-proof performance test can stop fire each time.
2. The fire resistance is qualified. There is no tempering in the fire resistance test for 1 hour.
3. The water pressure test of the shell is qualified. This product combines reason with light weight and corrosion resistance. Easy to repair and install. Flame arrester core is made of stainless steel, corrosion resistant and easy to clean
The following standards are cited:
GB / T4237-1992 stainless steel hot-rolled steel plate
GB / T6414-1986 dimensional tolerance of castings
GB / T9438-1988 Technical conditions for aluminum alloy castings
GB / T9439-1988 gray cast iron
GB 5908-1986 fire resistance and test method of flame arrester for petroleum storage tank
GB / T1804-1992 general tolerance
GB / T13306-1991 sign
GB / T13384-1992 General technical requirements for packaging of mechanical and electrical products
JB 78-59 cast iron flange
SY 5302-87 General technical parameters of gray cast iron parts for petroleum drilling and production machinery products
ZB G 33001-85 Teflon pipe
ZB G 33003-85 Teflon rod
ZB G 33004-85 PTFE film 工作原理 V. Working principle of FZT-1 fire blocking vent cap
阻火器 是由能够通过气体的许多细小、均匀或不均匀的通道或孔隙的固体材质所组成，对这些通道或孔隙要求尽量的小，小到只要能够通过火焰就可以。 Most flame arresters are composed of many small, uniform or non-uniform channels or pores of solid materials that can pass through the gas. These channels or pores are required to be as small as possible, as long as they can pass the flame. In this way, after the flame enters the flame arrester, it is divided into many small flame streams and is extinguished. The mechanism by which the flame can be extinguished is heat transfer and wall effects.
One of the factors that can stop the flame from spreading and force the flame to stop is the heat transfer effect. We know that the flame arrester is composed of many small channels or pores. When the flame enters these small channels, many small flame streams are formed. Due to the large heat transfer area of the channels or pores, after the flames exchange heat through the channel walls, the temperature drops and the flames are extinguished to a certain extent. The tests performed showed that when the thermal conductivity of the flame arrester material was increased by 460 times, its quenching diameter changed by only 2.6%. This shows that material issues are secondary. That is, heat transfer is a cause of extinguishing the flame, but it is not the main reason. Therefore, for the flame arrester used for explosion prevention, the material selection is not too important. However, when selecting materials, their mechanical strength and corrosion resistance should be considered.
According to the theory of the chain reaction of combustion and explosion, it is believed that the phenomenon of combustion and explosion is not the result of direct interaction between molecules, but that the molecule is split into a very lively and long life under the excitation of external energy (heat, radiation, electrical energy, chemical reaction energy, etc.). Short free radicals. Chemical reactions are carried out by these free radicals. Free radicals interact with another molecule, and as a result, new free radicals can be generated in addition to the products. In this way, the free radicals are consumed and renewed, so it goes on and on. It can be known that the flammable mixed gas burns on its own (there is no external energy effect after the combustion starts) under the following conditions: the number of newly generated free radicals is equal to or greater than the number of free radicals that disappear. Of course, self-combustion is related to the conditions of the reaction system, such as temperature, pressure, gas concentration, container size and material, and so on. As the size of the flame arrester channel decreases, the probability of collision between the free radical and the reaction molecule decreases, while the probability of collision between the free radical and the channel wall increases, which promotes the reduction of the free radical reaction. When the channel size is reduced to a certain value, this wall effect creates a condition that the flame cannot continue, and the flame is stopped. It can be seen that the wall effect is the main mechanism of the flame arrester. From this point, a flame arrester with a known structure can be designed to meet industrial needs.