vacuum equipment

　　1) Adjust the pressure of unloading valve DA10, relief valve DB10 or DB20 to the minimum. 　　 2) Check in the slurry inlet valve and close the slurry outlet valve to the minimum, that is, the slurry flow rate of the pump is small at this time. 　　 3) Start the motor, slowly adjust the relief valve DB10 or DB20 to adjust the mud pressure to be about 0.1Mpa-0.2Mpa less than the required pressure. 　　 4) Slowly adjust the unloading valve DA10 until the unloading valve has pressure (that is, the pressure gauge corresponding to the unloading valve shows less than 0Mpa). 　　 5) If the state cannot be reached, adjust the unloading valve and the relief valve according to the above steps 3 and 4 until this state. 　　 6) After adjusting the unloading valve, tighten the nut. (Note: The pressure of the unloading valve should be zero at this time, if it is not zero, then slightly lower the pressure of the unloading valve, and the pressure will only be displayed when it reaches zero). 　　 ...

　 The basic characteristic of rainwater pumping station is large flow and small head, therefore. Axial-flow pumps are mostly used, and sometimes mixed-flow pumps are used. The general process flow of rainwater pumping station is as follows: Inlet pipe:'inlet gate well, grit tank, grid room, foretank, and catch basin' water outlet and one outlet pipe, outlet gate well and outlet. For combined pumping stations, the catch basin is generally sewage and rainwater combined, and the pump It can be set separately or shared. Basic types of pump rooms The rainwater pump house (combined pump house) is generally built together with the collection tank and the pump. According to whether the ditch pool and the pump are separated by unsuitable partition walls, they are divided into "dry room" and "wet room". The "dry room" pump room (as shown in Figure 5. Lo) is generally divided into three floors. The upper floor is the motor room. Install motors an...

 Performance range: 2CY gear oil pump is suitable for conveying lubricating oil with viscosity of 5 × 10-6 ～ 1.5 × 10-3m2 / S (5-1500cst) or other liquids similar to lubricating oil and used in hydraulic rotating system without solid particles and fibers, without corrosiveness, temperature not higher than 80 ℃. LB refrigerator special gear pump: suitable for conveying no solid particles and fibers, no corrosion, temperature not higher than 80 ℃, viscosity 5 ~ 1500st Ch y gear pump: ch, CHY gear pump is used to transport the viscosity below 200 ° e (1500 MPa. S) of mechanical oil, turbine oil and other media with similar lubrication performance and properties, and the temperature is not higher than 120 ℃. K1p gear pump: pump displacement: cm3 / R. High efficiency, low energy consumption, convenient operation, easy maintenance, strong structure and long service life. HGP type gear pump: QT internal gear pump internal gear contact smooth, silent continuous operation. Its ...

 Analysis on the use stage of well furnace There are several stages in the operation of a well furnace: Furnace installation, exhaust and temperature rise: 1, after the well furnace to the temperature insulation 0.5~1h, make the temperature uniform, into the parts, hanging parts should be more than 10mm gap, to ensure that the gas unblocked. 2, the parts must be placed in the effective heating zone of the furnace tank, the upper end should not exceed the exhaust pipe, the lower end should keep a certain distance from the intake pipe, after installing the furnace exhaust time is about 20~60min. 3. The sample should be placed in three different positions: upper, middle and lower. 4, after the installation of the furnace, should immediately send infiltration agent exhaust (ethanol drops), when the temperature of the furnace to the specified temperature, in the outlet of the exhaust gas, such as the flame does not point, should increase the amount of infiltration agent or ...

Always committed to the upgrading and transformation of liangbang pump and valve enterprises, Yongjia is the early origin of China's liangbang pump and valve industry. In the past, factors such as single product structure, small enterprise scale, no brand, poor information, and weak technical innovation ability have become the bottleneck restricting the rapid development of liangbang pump valve industry. "After more than 20 years of development, Yongjia liangbang pump valve gradually improves its quality in all aspects, and strives to seek new breakthroughs in the development of liangbang pump valve industry. At present, liangbang pump and valve industry production and manufacturing base has been established, which integrates product manufacturing, technological innovation, quality inspection, enterprise gathering and talent training. It has participated in the construction of several key projects, which has changed the overall pattern of China's liangbang pum...

What sealing requirements do vacuum pumps have to prevent oil leakage People who have used water ring vacuum pump know that the sealing of the equipment is a very important part of the process of use, must not be careless. If the sealing is done well, the vacuum drop can be avoided during use. If the seal work is perfunctory, then at some time the equipment will have a failure problem, resulting in its damage, not normal use, affecting our work efficiency. Under its working pressure, the vacuum pump should drain all the gas produced in the process of vacuum equipment in time. Correct combination of vacuum pumps. Because the vacuum pump has selective pumping, therefore, sometimes choose a pump can not meet the requirements of pumping, need several kinds of pump combination, complement each other to meet the requirements of pumping. For example, titanium sublimation pump has a high pumping speed on hydrogen, but cannot pump helium, while triode sputtering ion pump, (or di...

First of all, in terms of the daily maintenance of the complete vacuum pump equipment, for the operators, to a large extent, they should be familiar with different types of instruments, pumps and various parts of the complete vacuum pump equipment. In fact, we should pay attention to reading carefully and understand different kinds of instructions. Then, the cooling water pressure on the whole set of vacuum pump equipment should be kept between 0.1 and 0.2 MPa directly. Next, we should pay attention to the outlet water temperature of the vacuum pump which should be kept at ≤ 45 ℃. For its own compressed air pressure, in fact, it should be between 0.4 and 0.5 MPa. Moreover, before starting up each furnace of the complete vacuum pump equipment, we should pay attention to check the capacity of the protective gas cylinder. In this regard, to a large extent, it can avoid insufficient gas filling and replace the gas cylinder. If there is any abnormal situation after startup, i...

Fire pump is an important equipment for fire fighting and rescue. According to our habitual thinking, all important equipment should be equipped with overload protection. However, according to article 8.6.3.5 and article 1 0.2.2.4 (3) of the civil regulation, "for distribution lines whose sudden power failure will lead to greater losses than those caused by over-load, over-load protective appliances (such as power supply lines of fire pumps) that cut off the circuit shall not be installed, but over-load alarm appliances shall be installed. According to this regulation, the fire pump should not be equipped with overload protection cut-off device. This is mainly in view of the fire, the need to ensure the fire water, because the pump overload may cause line, equipment loss compared with the fire loss is negligible. But in engineering practice, and even in some construction standard atlas, including college textbooks introduced in fire pump electrical diagram, fire pump ...

Today, the centrifugal pump manufacturer Jian'an small edition briefly describes the working principle of centrifugal pump for you. Before starting, the liquid shall be poured into the pump body and suction pipe from the type pipe. When the impeller rotates very fast, the liquid in the impeller also follows the rotation under the promotion of the blade in the impeller, so that the liquid gets the centripetal force, and moves outward from the impeller management center along the blade passage, and then is thrown out from the beam end of the blade into the worm chamber or outer diffusion tube (or guide wheel) in the pump body. When the liquid flows into the outer diffusion tube, due to the gradual expansion of the total cross-sectional area of the flowing liquid and the slow reduction of the water flow, part of the mechanical energy is converted into the static energy head, so that the working pressure is increased, and finally it is pressed out from the discharge tub...

Different vacuum systems require different degrees of vacuum. Therefore, a set of vacuum units must be used to complete, that is, the vacuum pumps working in different pressure ranges are connected in series. The vacuum pump on the high-vacuum side can achieve the vacuum required by the system, while the vacuum pump on the low-vacuum side is directly exhausted to the atmosphere. Obviously, the simplest vacuum unit is a straight-line vacuum pump. However, high-vacuum systems generally require three-stage units, and medium-vacuum systems generally require two-stage units. A high vacuum pump and a low vacuum pump are difficult to form an effective high vacuum unit. There are several reasons for this. Traffic continuity is one of them. High-vacuum pumps have the limitation of the pressure resistance of the fore stage, that is, the fore stage is higher than a certain pressure, the pump cannot work normally. When the current stage pump reaches this critical pressure, the pump...

During the operation of Roots vacuum unit, friction may be caused by improper operation of workers, which is not good for our machine. In order to avoid this phenomenon, we will take certain measures to solve it. What are the specific steps? When the wear size of the transmission part is relatively small, the polymer composite repair material can be used on site without disassembly and repair, which not only avoids machining, but also does not have the thermal stress and heat effect of repair welding, and the repair thickness is not limited. At the same time, the wear resistance of the product and the fallback of the metal material are not provided, which ensures 100% contact and coordination of the repair part and reduces the impact vibration of the equipment, Avoid the possibility of wear, and greatly extend the service life of equipment components (including bearings), save a lot of downtime for enterprises, and create huge economic value. Its suction port is connecte...

Roots vacuum unit has a kind of filtering function in use, which is inseparable from the role of filter element. In order to better realize the filtering function and improve the efficiency of the equipment, it is also necessary to regularly maintain the filter element. Refer to the following for specific maintenance methods. The filter element of Roots vacuum unit shall be inspected frequently to avoid failure affecting the whole equipment. After the filter element is used for a period of time, it is strongly recommended to replace it. It can't be used for any other purpose, so that not only the good filtering effect can't be achieved, but also the operation of the machine will be affected. Generally, before opening roots vacuum unit, we will check whether the parts are complete and whether there is any fault, so as to avoid problems in use and affect the working efficiency. For filter element, we can open the machine to see the driving current after all the par...

The influence of the position of suction and exhaust hole on pump performance of liquid ring vacuum pump was studied. Through technical renovation project, the concept of critical compression ratio of liquid ring pump and its influence on pump performance are theoretically expounded, and the relationship between suction and exhaust hole area and opening position of liquid ring pump and compression ratio is analyzed. When the operating condition of the pump exceeds the critical compression ratio, how to reduce the flow loss of the pump to the minimum by modifying the internal structure and how to achieve high performance of the pump have important reference significance for future project application and system transformation. liquid ring pump as a varactor type gas conveying equipment, gas can not only as a vacuum pump suction as well as make the system get the negative pressure, and can be used as compressor compressed gas so as to make the system get positive pressure...

The temperature rise of Roots vacuum unit refers to the difference between the maximum temperature and the room temperature measured at all parts of the pump surface under the condition of stable operation of limit vacuum or rated vacuum (direct discharge atmosphere roots vacuum unit). There is no limit to the types of thermometers used to measure temperature rise, but they should have a measurement accuracy of ± 1 ℃. When marking the temperature rise, the room temperature at that time and the cooling conditions of the pump, including the cooling method, shall be indicated at the same time. If it is water-cooled, the temperature of water in and out shall be indicated. The outlet pressure of Roots vacuum unit refers to the pressure measured near the exhaust port under the condition of stable operation of Roots vacuum unit, corresponding to a certain inlet pressure value. The test of the outlet pressure can be carried out at the same time with the measurement of the pumping ...

Water as a very common working fluid or coolant, it also plays an indispensable important role in the normal operation of the water ring vacuum pump, and in the water ring vacuum pump, it can be recycled, but also need to pay attention to some details of knowledge, in order to avoid unnecessary trouble. Below we will specifically understand the use of water ring vacuum pump working fluid to understand the problem: 1. When the working fluid is recycled, it can be kept free of impurities. If it is recycled, it needs to be combined with water tank and cooling. Need to pay attention to the use of water ring vacuum pump 2, generally need to add equipment cooling, more important is the on-site process, temperature control, most of the industry is in fact recycled water repeated use, do not waste, if water can be used, but the circulation pipeline must be installed, usually, water ring vacuum pump working fluid should choose industrial soft water. 3, water ring vacuum pump in ...

2BV water ring vacuum pump will produce more or less friction after use. We need to constantly lubricate it to keep it in good working condition, and maintain it for a longer time after use. If you don't know how to do maintenance, give you a detailed introduction. Under normal working conditions, the waste grease and its dirt in bearing and accessory space shall be removed and new grease shall be added after rotating speed of 20000h or 3 years at most. The added grease shall account for 50% of the bearing free space and 65% of the bearing cover space. If the working conditions are very bad, the replacement period of the grease should be shortened accordingly. 1. If hard water is used as working fluid, it can only be used after softening treatment, or the pump can be cleaned with solution within a certain period (to avoid abrasion of impeller and pump body or jamming of impeller, dust particles entering the pump cavity with gas and working fluid shall be cleaned thro...