N-Butyl-N-Methyl-Piperidinium Bromide,N-Butyl-N-Methyl-Piperidinium Bromide 94280-72-5,N-Butyl-N-Methyl-Piperidinium Bromide Cas 94280-72-5,Piperidine Ionic Liquids Henan Tianfu Chemical Co.,Ltd , https://www.hnionicliquids.com
Gate valve is the closing piece (gate) along the vertical axis of the channel to move the valve, the pipeline is mainly used as a cut-off medium, that is, fully open or closed. In general, the gate valve can not be used as regulating flow. It can be applied to low temperature pressure can also be applied to high temperature and pressure, and according to the valve of different materials. However, the gate valve is generally not used for transporting medium such as mud in the pipeline. Advantages: ①small fluid resistance; ② Kai, closing the required torque is small; ③ can be used in the medium flow in both directions of the ring network pipeline, which means that the flow of media is not restricted; ④ fully open, the sealing surface by the work Medium erosion than the globe valve is small; ⑤ body structure is relatively simple, manufacturing technology is better; ⑥ shorter length of the structure. Disadvantages: ①large size and opening height, the installation space is also larger; ② in the opening and closing process, the sealing surface relative friction, wear larger, even at high temperatures can easily lead to scratching; ③ The general valve has two sealing surfaces, to the processing, grinding and maintenance increased some difficulties; ④ open and close a long time. Butterfly valve is used to open and close the circular opening and closing pieces about 90 ° to open, close and regulate the fluid channel of a valve. Advantages: ①simple structure, small size, light weight, supplies province, especially for large-diameter valves; ② quick opening and closing, the flow resistance coefficient is small; ③ can be used for medium with suspended solids, based on the strength of the sealing surface is also available In powdered and granular media. It can be used for bidirectional opening and closing and adjustment of ventilation and dust removal pipeline. It is widely used in gas pipeline and waterway of metallurgy, light industry, electricity and petrochemical industry. Disadvantages: ①flow adjustment range is not large, when the open up to 30%, the flow will be more than 95%. ② Due to the structure of the butterfly valve and sealing material restrictions, should not be used for high temperature, high pressure piping system. General working temperature below 300 ℃, PN40 (6 ~ 40) the following. ③ sealing performance relative to the ball valve, globe valve is poor, it is used for sealing the place is not very high.