Influence of gear pump head lift

【Asia Pump Network News】 Gear pump is suitable for the temperature is not higher than 70 ℃, the delivery of a variety of lubricating liquid, is now in the petroleum, chemical, shipbuilding, electricity, food, food, medical, building materials, metallurgy and defense research Other industries play an important role, widely praised by market users. However, people know little about its relevant information, which should pay attention to the design and layout of the pipeline, what the impact of the flow head, this Xiaobian for you to answer one by one. Gear pump head flow impact analysis First, the gear pump in the design layout of the pipe, the main pipe diameter should be considered, the pressure of the exhaust pipe and the joint and whether the need to install the valve and other aspects to consider, as follows: 1. Reasonable choice of gear pump pipe diameter , The pipe diameter is large, the same flow rate, the flow rate is small, the resistance loss is small, but the price is high, the pipe diameter is small, will lead to a sharp increase in resistance loss, so that the selected pump lift, with increased power, cost and Operating costs have increased. Therefore, it should be considered technically and economically. 2. Exhaust pipe and fittings should consider the maximum pressure can withstand. 3. Pipe layout should be arranged as straight pipe as far as possible to minimize the pipe attachment and minimize the length of the pipe, you must turn when bending the elbow bend radius should be 3 to 5 times the pipe diameter, the angle is greater than 90 ℃. 4. The discharge side of the pump must be fitted with a valve (ball valve or globe valve, etc.) and check valve. The valve is used to adjust the operating conditions of the pump. The check valve prevents the pump from reversing when the fluid is flowing backwards and prevents the pump from hitting the water hammer. (When the liquid back, it will have a huge reverse pressure, so that the pump damage) Second, the impact of gear pump flow head gear pump flow to determine the following three aspects to consider: 1. If the production process has been given the smallest, Normal, maximum flow should be considered the maximum flow. 2. If the production process gives only normal flow, should consider leaving a certain margin. For ns100 large flow low-lift pump, take 5% of the flow margin, the ns50 low-flow high-lift pump, the flow margin of 10%, 50 ≤ ns ≤ 100 pump, the flow margin also take 5% of the quality Poor pump performance and poor operating conditions, flow margin should be taken 10%. 3. If the basic data only to the weight flow, should be converted into volume flow. Above is the gear pump pump design considerations and the impact of the flow head, I hope for your help. This article is copyrighted industry interconnect (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: Zeng Fenfen (QQ / micro letter:) starting: http: //beng.liuti.cn / (Service Hotline:)

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