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The difference between variable air volume butterfly valve and venturi valve

Views:5     Author:Xicheng Ep Ltd     Publish Time: 2021-12-15      Origin:Xicheng Ep Ltd

Laboratory ventilation systems designed on the market today are generally divided into three categories, simple control of constant air volume systems, iteratively upgraded dual air volume systems on this basis, and brand new variable air volume systems. However, it can be seen from the product naming that the function of the variable air volume system is relatively superior. The traditional ventilation system has poor exhaust effect, bad flexibility, and high noise, which can not meet the requirements of the laboratory at all, so the variable air volume The system was born in response to the times. The variable air volume system is also divided into variable air volume butterfly valve and variable air volume venturi valve. What is the difference between the two? Let's take a look.

Biàn fēngliàng diéfá biàn fēngliàng diéfá yǔ wénqiū lǐ fá de qūbié xiàn rújīn shìchǎng shàng shèjì de shíyàn shì tōngfēng xìtǒng, yībān fēn wéi le sān dà lèi, kòngzhì jiǎndān de dìng fēngliàng xìtǒng, zài cǐ jīchǔ shàng diédài shēngjí de shuāng fēngliàng xìtǒng, yǐjí quánxīn de biàn fēngliàng xìtǒng. Dàn cóng chǎnpǐn mìngmíng shàng jiù kěyǐ kàn chū, biàn fēngliàng xìtǒng de gōngnéng shì bǐjiào yōuyuè de, chuántǒng de tōngfēng xìtǒng pái fēng xiàoguǒ chà, línghuó xìng zāogāo bù shuō, zàoyīn hái dà, wánquán bùnéng mǎnzú shíyàn shì de yāoqiú, suǒyǐ biàn fēngliàng xìtǒng jiù yìng shídài ér shēngle. Nà biàn fēngliàng xìtǒng yě fēn wéi biàn fēngliàng diéfá yǔ biàn fēngliàng wénqiū lǐ fá, zhè èr zhě yòu yǒu shé me qūbié ne? Yī qǐlái kàn kàn ba. Diéfá shì fámén de yī zhǒng lèixíng, tā kěyǐ yòng lái tiáojié kāi dù, xíngtài jiù xiàng húdié yīyàng, dāng cèliáng dào fēngsù shí, tā kěyǐ lìyòng zìshēn zhuāngpèi de chuángǎnqì jiāng cèliáng dào de shùzhí zhuǎnhuà wéi diàn xìnhào, ránhòu xìtǒng jiù huì gēnjù cǐ xìnhào tiáojié fēng fá, zhěngtǐ shì bìhuán fǎnkuì kòngzhì de, jiégòu xiāngduì jiǎndān hé róngyì, érqiě néng bǎozhèng ānquán xìng. Dàn biàn fēngliàng diéfá de quēdiǎn yě fēicháng míngxiǎn, zuì zhìmìng dì dìfāng zàiyú qí kòngzhì jīngdù bìng bù gāo, yīnwèi huì shòudào cèliáng diǎn wèizhì hé shùliàng de yǐngxiǎng, érqiě chuángǎnqì yě xūyào shíjiān fǎnyìng, rúguǒ ānzhuāng shí bù zhùyì dehuà, nèiwài qìliú wěnluàn yě huì dǎozhì diéfá kòngzhì bù wěndìng, xìnhào xiǎngyìng shíjiān biàn zhǎng, jīngdù yě zhǐ néng wéichí zài 20%zuǒyòu. Zhè yī lèi fámén de yōudiǎn zàiyú shǐyòng fāngbiàn, shèjì zhíjiē, rúguǒ bù kǎolǜ shǐyòng zàoyīn huòzhě méiyǒu jīngdù yāoqiú de chǎngsuǒ, diéfá dì xìngjiàbǐ gèng gāo. Dàn rúguǒ shì gè lèi shíyàn shì, huòzhě yǒu jīngmì yíqì de yīyuàn děng chǎngsuǒ, diéfá jiù huì bàolù chū tā de duǎn bǎn, zhè shíhòu jiù bùdé bù yùnyòng shàng biàn fēngliàng wénqiū lǐ fále. Biàn fēngliàng xìtǒng tóngyàng jièzhù chuángǎnqì, dàn bùtóng yú diéfá, tā shì lìyòng de wèiyí chuángǎnqì qù cèliáng yí mén kāi dù, ránhòu jiāng xìnhào chuánshū gěi kòngzhì qì, ér kòngzhì qì zì dài suànfǎ gōngshì, huì gēnjù jìsuàn chūlái de fēngliàng zìxíng tiáojié fámén kāi dù dàxiǎo, cóng'ér tiáojié xìtǒng de pái fēngliàng. Biàn fēngliàng wénqiū lǐ fá de yōudiǎn jiù zàiyú xìtǒng kàng gānrǎo xìng hǎo, xiāng jiào yú chuántǒng de dié fá, tā de jīngdù kěyǐ dádào jǐn fúdòng 5%, érqiě hái néng shíxiàn chuántǒng fámén bùnéng shíxiàn de gāo tiáojié bǐlì, rú dé sài zhì yán tsirosmax de biàn fēng liàng wénqiū lǐ fá, jiù kěyǐ dádào 20:1 De tiáojié bǐ, zài hángyè chǎnpǐn zhōng xiāngduì bǐjiào túchū. Cóng lǐlùn shànglái shuō, wénqiū lǐ fá de xiǎngyìng shíjiān kěyǐ xiǎoyú 1 miǎo zhōng, bù huì shòudào qítā wàilái yālì de yǐngxiǎng. Zǒng de lái shuō, bùtóng shíyàn shì huì yǒu bùtóng de tōngfēng xūqiú, fámén de xuǎnzé jiù yīnggāi yīndìzhìyí. Rúguǒ gǎo bù qīngchǔ shì xuǎnzé dié fá háishì wénqiū lǐ fá, yě kěyǐ zīxún dé sài zhì yán de shèjì rényuán huòzhě zhuānjiā yìjiàn, quèbǎo zuò dào zhēnduì xìng de shèjì, bǎozhèng shíyàn shì de tōngfēng ānquán yǐjí zhèngcháng yùnzhuǎn. Zài cǐ jīchǔ shàng, yě yào xuǎnzé gāo pǐnzhí yǒu kǒubēi de shēngchǎn chǎngjiā, rú shēnzhèn xī chéng huánbǎo kējì yǒuxiàn gōngsī, nénggòu zuò dào gāo pǐnzhí de jīchǔ shàng wèi yònghù jiéyuē chéngběn, bìng tígāo shūshì dù. 展开 956 / 5,000 翻译结果 Variable air volume butterfly valve

Butterfly valve is a type of valve, it can be used to adjust the opening, the shape is like a butterfly, when the wind speed is measured, it can use its own sensor to convert the measured value into an electrical signal, and then the system will be based on The signal regulating air valve is closed-loop feedback controlled as a whole, and the structure is relatively simple and easy, and it can ensure safety.


But the shortcomings of the variable air volume butterfly valve are also very obvious. The most fatal part is that its control accuracy is not high, because it will be affected by the position and number of measuring points, and the sensor also needs time to respond. If you do not pay attention to the installation, the internal and external airflow will be disordered. It will also cause the butterfly valve control to be unstable, the signal response time will be longer, and the accuracy can only be maintained at about 20%. The advantage of this type of valve is that it is easy to use and the design is straightforward. If you do not consider the use of noise or where there is no accuracy requirement, the butterfly valve is more cost-effective.

venturi valve

But if it is a variety of laboratories, or hospitals with precision instruments, the butterfly valve will expose its shortcomings, and then the upper variable air volume venturi valve will have to be used. The variable air volume system also uses sensors, but different from the butterfly valve, it uses a displacement sensor to measure the opening of the sliding door, and then transmits the signal to the controller. The controller has its own algorithm formula and adjusts the valve according to the calculated air volume. The size of the opening can adjust the exhaust air volume of the system.


The advantage of the variable air volume venturi valve is that the system has good anti-interference ability. Compared with the traditional butterfly valve, its accuracy can reach only 5%, and it can also achieve a high adjustment ratio that cannot be achieved by traditional valves. For example, Desai Zhiyan The tsirosmax variable air volume venturi valve can reach a turndown ratio of 20:1, which is relatively prominent in the industry products. In theory, the response time of the Venturi valve can be less than 1 second, and it will not be affected by other external pressures.


In general, different laboratories have different ventilation requirements, and the choice of valves should be tailored to local conditions. If you are not sure whether to choose a butterfly valve or a Venturi valve, you can also consult the designers or experts of Desai Zhiyan to ensure targeted design and ensure the safety and normal operation of the laboratory. On this basis, we must also choose high-quality and well-known manufacturers, such as Shenzhen Xicheng Environmental Protection Technology Co., Ltd., which can save costs for users and improve comfort on the basis of high quality.


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