Self-priming suction pump self-priming performance of the main reasons: 1. The storage volume and the height of the liquid storage The storage volume refers to the pump is stopped, the pump body can store the volume of the liquid part, which is the pump below the lowest point of the pump Body volume, 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 Hutan 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 liquid flow rate of 80-90% of the chamber. 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 pressure chamber at the lower part of 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 the impeller to determine that the lower diaphragm located in the base of the volute chamber. 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 internal mixing centrifugal self-priming pump, the area of ​​the backflow hole has a great influence on the self-priming performance. The area is large so that more liquid is returned to the inlet of the impeller through the backflow hole, 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.

Single Handle Faucets

The present invention provides a multifunctional pull faucet, comprising: a faucet body, a drawing part is provided at the water outlet port thereof, and the drawing part is connected to a main channel, wherein at least three are provided in the faucet body A branch channel, and the three branch channels are all connected to the main channel. A multifunctional pull faucet provided by the present invention, wherein the hot water channel, the cold water channel and the water purification channel (pure water channel) are all connected to the main channel , And the main channel is connected with the drawing part on the main body of the faucet, so that the drawing part can obtain the water quality (hot water, cold water, purified water or pure water) required by different users, thereby improving the user experience, and , By integrating the hot water channel, cold water channel and pure water channel (pure water channel) into the main channel, the internal structure of the faucet is simplified, and the production cost of the faucet is reduced..

Single Handle Faucets,Pull Out Laundry Faucet,Pull Out Shower Handle,Stainless Steel Single Handle Faucets

Yuyao Zelin Sanitary Ware Co., Ltd , https://www.kitchen-sinkfaucet.com

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