Q:Can the inlet and outlet of butterfly valve be reversed? Why? What will happen if the reverse gear is installed?

Are butterfly valves and check valves fitted together?Butterfly valve is nothing positive and negative ah!

Q:The flow ratio of area and maximum flow area of the valve is? If it refers to the opening of the valve rotation angle? Butterfly linear closure refers to the butterfly valve at constant angular velocity close? When the change trend of flow is what? These valves problem bothering me for a long time,

Butterfly valve "opening - flow" curve in the flow of 25%-75%, that section is basically linear. That is, the opening of 40%, that flow is about 40%Butterfly valve opening degree of 0.5, should be opened 50%, that is, opening to 45 degrees;

Q:What's the difference between butterfly valves and check valves?

Butterfly valve is manual, only switch function.The check valve is an automatic valve, which prevents backflow of the pipe medium.

Q:What do D71, D371 and D341 represent in butterfly valves?

D71 in D is the meaning of butterfly valve, 7 refers to the connection is the clamp, and 1 refers to the butterfly plate is the center of verticalD371 in D is the meaning of butterfly valve, 3 refers to the drive mode is the turbine, 7 refers to the connection is the clamp, and 1 refers to the butterfly plate is the center of verticalD341 in D is the meaning of butterfly valve, 3 refers to the drive is turbine, 4 refers to the connection is flange connection, and 1 refers to the butterfly plate is the center of vertical. China valve Holding Group Co., Ltd. Zhang Chao 021-55601036 Fax: 021-66289822

Q:That industry uses most of the butterfly valve, and only use the butterfly valve, a large number of use of butterfly valve, seek expert advice!

I know there are automatic fire fighting systems and the oil industry.

Q:Butterfly valve D71X-10 and butterfly D371X-10 what is the difference?

Different structure. The handwheel (or handle) of the D71X-10 is mounted directly on the valve stem, and the D371X-10 is operated by means of a bevel gear in combination with the worm, and the handwheel is mounted on the worm.

Q:What does butterfly valve do?

[1] butterfly valve is also known as turn over plate valve, is a simple structure of the control valve, but also can be used for low pressure pipe medium switch control.[2] butterfly valve: butterfly valve refers to the closure of parts (valve or butterfly plate) for the disk, around the valve shaft to achieve rotation and closing of a valve, the main cut off on the pipe and throttling role. Butterfly valve headstock is a disc shaped disc, in the valve body around its own axis of rotation, so as to achieve the purpose of opening or closing or regulation. Butterfly valve used in furnace, coal gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation environmental protection engineering system, conveying a variety of corrosive and non corrosive media pipeline, used to adjust and cut off the media flow. Butterfly valve categories are: handle butterfly valve, turbine butterfly valve, pneumatic butterfly valve, electric butterfly valve and so on.

Q:The difference between gate valve and butterfly valve, as well as cut-off valve, what are their applicable conditions? Advantages and disadvantages?

Without strict conditions and advantages and disadvantages, of course, the equipment requires a relatively high degree of automatic control. I can check it out on Baidu.

Q:Which is better, the round two lobe butterfly valve?

The company has advanced sheet metal CNC processing line, strong technical force and strong production capacity. At present, the main products are: air outlet, air valve, muffler, fire damper, static pressure box, wind box, etc.. Especially round type double butterfly butterfly valve has obvious advantages.

Q:What is the meaning of American Standard butterfly valve B series

American Standard flange connection is divided into A, B series. A series for normal flanges, B series for compact flanges. 24 "to no AB series, flange standards for B16.5, 24" above B16.47.