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”系列文丘里风量控制阀是高精度、高速反应的压力无关性风量控制设备。具有不受管道内静压变化影响，精确维持设定风量的自调式的机械结构. 它可以在化学、生物实验室或洁净室、动物饲养设施、P3实验室、医院等需要对气流进行精确控制的领域发挥巨大作用。通过静压力的改变来保持一个固定的空气流量.每个文丘里阀门都有一个阀芯组件,它带有一个内置的不锈钢弹簧.当出现低静压时,加在阀芯上的用于使阀芯中弹簧张开以将阀芯从文丘里拉开的力较小.低压力与大的打开面积的组合提供理想的流量.当出现高静压时,弹簧压缩并且阀芯移入文丘里阀,减小了打开面积,提高压力与较小开度的结合维持了流量的稳定.以高速电动式控制器，按照要求风量的变化进行高速控制。传统的变风量阀不可能实现。上海国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.
我们可对任何一款产品做出改动以满足客户需求。无论是尺寸或者材质。（耐高温聚丙烯等任何可焊接塑料） 我们为您提供最为专业的实验室PP/PVC产品以及一流的气流控制方案。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文丘里阀