ZWB explosion-proof self-priming sewage pump for chemical, petroleum, pharmaceutical, mining, paper, fiber, pulp, textiles, food, power plants and municipal sewage works, public facilities sewage, pond culture and other industries. So in the process of using, what factors will affect the ZWB explosion-proof self-priming sewage pump self-absorption capacity? Xiaobian give you a brief introduction of the impact of ZWB explosion-proof self-priming sewage pump self-priming performance of the main factors. After Effects ZWB proof self-absorption main factors sewage pump self-priming performance determine reservoir volume 1. accumulator volume of the reservoir height refers to the pumps stop, the pump body can store the volume of the liquid portion, i.e. the pump suction port lowest point less Of the volume of the pump body, this part of the volume is mainly the pressure chamber and gas-liquid separation chamber part. The volume of the reservoir should be not less than half of the pump design flow in seconds (for example, if the pump design flow is not less than the volume of the reservoir and the volume of the reservoir is too small (too little liquid is stored in the pump), self-priming Time increases, or even self-absorption; over, making the pump bulky. In addition to having a sufficient reservoir volume, there must also be a reservoir height, which is the height at which the pump sucks in to the center of the impeller, usually approximately equal to the impeller radius. 2 · Determination of the volume of the gas-liquid separation chamber and the height of the outlet of the pump Gas-liquid separation refers to the part outside the pressure chamber of the pump. The larger the volume, the better the separation effect of gas and liquid and the faster the separation. Liquid separation chamber volume to a certain extent, and then increase the effect is not significant, the reverse will make the pump body bulky, so the gas-liquid separation chamber has an optimal volume value, according to the experience of its value is equal to or slightly larger than the liquid storage Volume, in ensuring the gas-liquid separation chamber capacity of the case, the pump outlet to the centerline of the impeller height can be based on liquid storage volume and gas-liquid separation chamber volume at the time of drawing to determine the height. 3. Determination of liquid flow rate out of the chamber Centrifugal pump self-priming pump out of the chamber liquid flow rate than the average centrifugal pump is lower, about equal to the general centrifugal pump out of the chamber liquid flow rate of 80-90%. 4 · Determination of the gap between the tongue and the impeller gap For the centrifugal self-priming pump, the gap between the tongue and the impeller has a great influence on the self-priming performance, the gap between the tongue and the impeller in the upper pressure chamber is smaller, Shorter, this gap is usually mixed outside; take mixed inside. If the design of the double cochlear chamber then the lower part of the pressure chamber separating the gap between the tongue and the impeller, usually according to the general centrifugal pump pressure chamber to determine the gap between the tongue and impeller to determine that the lower diaphragm located in the base of the volute chamber, and . 5. Turning of the impeller rear cover For external mixing centrifugal self-priming pumps, when the impeller outer circle speed is less than the self-priming effect, the method of turning the impeller rear cover may be used to improve the self-priming capability because of the ease of self- Suction process of liquid and gas mixture. Turn the amount can not be too large, otherwise it will significantly reduce the pump head and efficiency. At that time, the impeller rear cover diameter after cutting; at that time, and in the separation of the tongue at the ribs to prevent bubbles with liquid in the cut off the back cover at the cycle, affecting self-absorption effect. 6. Area of Backflow Hole For the inner mixing centrifugal self-priming pump, the area of the backflow hole has a great influence on the self-priming performance and the area is large so that the liquid that returns to the inlet of the impeller through the backflow hole is large, so the self-priming time is short but The maximum vacuum degree of self-priming decreases; self-priming time is longer when the backflow hole area is small, and the height of the maximum self-priming vacuum is high. In summary, to determine the area of the backflow hole, we must consider the self-priming time and self-priming height requirements. Extended reading: Top ten brands of motor China Construction Water Exhibition Pump manufacturers ranked ptc exhibition industry Internet (Xiamen) Technology Co., Ltd. Asia Pump Network Editor: He Daohui (QQ / WeChat:) http://beng.liuti.cn/ (service Hotline:)
A flange can also be a plate or ring to form a rim at the end of a pipe when fastened to the pipe. A blind flange is a plate for covering or closing the end of a pipe. A flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together.
Although the word flange generally refers to the actual raised rim or lip of a fitting, many flanged plumbing fittings are themselves known as 'flanges':
There are many different flange standards to be found worldwide. To allow easy functionality and interchangeability, these are designed to have standardised dimensions. Common world standards include ASA/ASME (USA), PN/DIN (European), BS10 (British/Australian), and JIS/KS (Japanese/Korean). In the USA, ANSI stopped publishing B16.5 in 1996, and the standard is ASME B16.5
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