Classic (Classical) the venturi tube (29) Classic Venturi tube structure diagram standard venturi tube for measuring single phase stable closed conduit the volume flow of the fluid (liquid, gas or vapor). ISO5167 and GB/T2624 standard design and manufacturing. It requires all standard throttling device on the downstream straight pipe shortest, and minimum pressure loss, stable performance, easy maintenance. Confidence stems from the quality, the facts speak for Company Name: Henan Airlines Traffic Instrument Co., Ltd. Address: Xinxiang City, Henan Province, western part of high-Bay, Grace Avenue northbound Tel: 0373-2678866 26788772678778 26780882677766 Fax: 0373-2678899 Zip Code: 453003 E - mail: hnxhyb@163.com URL: http://www.hnxhyb.com http://www.hnxhyb.com.cn http://www.llyb.cn/ MSN: jeany2012@hotmail.com main technical parameters are shown in Table (2): Venturi tube type male said through diameter DN of the (mm) aperture ratio (β = d / D) Reynolds number ReD material has a "rough cast" contraction segment of the classic text venturi tube 100 to 800 0.3 to 0.75 2 × 105 ~ 2 × 106 of cast iron or copper, having a mechanical processing shrinkage segment classical Venturi tube 50 ~ 250 0.4 ~ 0.75 2 × 105 ~ 2 × 106 of carbon steel or stainless steel having a rough welding sizzling contraction section classical Venturi tube 200 ~ 2600 0.4 ~ 0.7 2 × 105 ~ 2 × 106 of carbon steel or stainless steel, when measuring the flow of dirty media, may be equalizing ring structure: cloth 4 to 8 taps are taken at the same section of the pressure port, the pressure are summarized in equalizing the pressure tube ring spread to the differential pressure transmitter. Possibility of clogging is smaller and can be periodically discharged from the outfall impurity, clear at the pressure port of the buildup. Henan Airlines Traffic Instrument Co., Ltd. Address: Xinxiang City, Henan Province, western part of high-Bay, Grace Avenue North Tel: 0373-2678866 26788772678778 26780882677766 Fax: 0373-2678899 Postcode: 453003, China E - mail: hnxhyb@163.com URL: http://www.hnxhyb.com http://www.hnxhyb.com.cn http://www.llyb.cn/ MSN: jeany2012@hotmail.com