Rexcontrols Venturi Air Valve
The Venturi valve is pressure independent.
The variable volume valve maintains a desired air volume independently of the static pressure at the valve. As the static pressure increases, the internal spring compresses to maintain a constant volume of air. Likewise, as the static pressure decreases, the internal spring expands and moves the cone to increase the annular area, thus maintaining a constant volume.
The Venturi Valve will control air flow for both supply and return or exhaust ducts based on CFM of flow set by the pneumatic actuator. This valve in its normal operating mode is pressure independent so that flow is constant based on specific actuator positions. Flow control using the Venturi is, therefore, linear over most of its control range. “REXCONTROLSTM”系列文丘里風(fēng)量控制閥是高精度、高速反應(yīng)的壓力無(wú)關(guān)性風(fēng)量控制設(shè)備。具有不受管道內(nèi)靜壓變化影響,精確維持設(shè)定風(fēng)量的自調(diào)式的機(jī)械結(jié)構(gòu). 它可以在化學(xué)、生物實(shí)驗(yàn)室或潔凈室、動(dòng)物飼養(yǎng)設(shè)施、P3實(shí)驗(yàn)室、醫(yī)院等需要對(duì)氣流進(jìn)行精確控制的領(lǐng)域發(fā)揮巨大作用。通過(guò)靜壓力的改變來(lái)保持一個(gè)固定的空氣流量.每個(gè)文丘里閥門都有一個(gè)閥芯組件,它帶有一個(gè)內(nèi)置的不銹鋼彈簧.當(dāng)出現(xiàn)低靜壓時(shí),加在閥芯上的用于使閥芯中彈簧張開(kāi)以將閥芯從文丘里拉開(kāi)的力較小.低壓力與大的打開(kāi)面積的組合提供理想的流量.當(dāng)出現(xiàn)高靜壓時(shí),彈簧壓縮并且閥芯移入文丘里閥,減小了打開(kāi)面積,提高壓力與較小開(kāi)度的結(jié)合維持了流量的穩(wěn)定.以高速電動(dòng)式控制器,按照要求風(fēng)量的變化進(jìn)行高速控制。傳統(tǒng)的變風(fēng)量閥不可能實(shí)現(xiàn)。上海國(guó)君生化科技有限公司REXCONTROLS - THE ART OF FUME CONTROL
REXCONTROLSTM can customize any of our fume hood ranges to meet your specific need or wish. As in all our ranges any size desired and is manufactured in all polypropylene, flame retardant polypropylene, or almost any weldable plastic of your choice.
我們可對(duì)任何一款產(chǎn)品做出改動(dòng)以滿足客戶需求。無(wú)論是尺寸或者材質(zhì)。(耐高溫聚丙烯等任何可焊接塑料) 我們?yōu)槟峁┳顬閷I(yè)的實(shí)驗(yàn)室PP/PVC產(chǎn)品以及一流的氣流控制方案。For More Information
WWW.REXCONTROLS.CN
GuoJun Biochemical Technology
No.1081,ChengBei Road,
Jiading District,Shanghai,
P.R.China.201800
T 86-21-39968765
M 13651868683
REXCONTROLS文丘里閥