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NEWS & BLOGS

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2023-02-15

Use, Maintenance, and Servicing of Shandong Reciprocating Vacuum Pumps

As winter temperatures drop, water pumps in many settings are forced to stop operating due to the cold. This makes maintenance and upkeep all the more critical. So, let’s take a closer look at the operation, maintenance, and servicing of Shandong reciprocating vacuum pumps. I. Maintenance and Servicing of Shandong Reciprocating Vacuum Pumps: 1. After shutting down the pump, drain any remaining water from both the pump itself and the pipelines, and thoroughly clean off any external dirt. This prevents the pump body and pipes from bursting due to freezing and subsequent ice expansion. 2. Cast-iron components such as bottom valves and elbows of Shandong reciprocating vacuum pumps should be cleaned thoroughly with a wire brush. Before coating, apply an anti-rust paint, then store them in a well-ventilated, dry area within the machine room or in a properly dried storage room. 3. If the pump is driven by belts, remove the belts, wash them with warm water, and allow them to air-dry completely. Then hang them in a dry place, avoiding direct sunlight. Do not store them in areas contaminated with oil, corrosive substances, or smoke. Under no circumstances should belts come into contact with oily substances such as engine oil, diesel, or gasoline, nor should they be coated with sticky materials like rosin. 4. Inspect the ball bearings. If the inner and outer races show signs of wear, movement, ball wear, or surface discoloration, replace them. For bearings that do not need replacing, clean them thoroughly using gasoline or kerosene, apply grease, and then reinstall them. 5. Check the impeller for cracks or small holes, and ensure that the impeller’s fixing nuts are securely tightened. If any damage is found, it should be repaired or replaced.

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2023-02-09

The water-ring vacuum pump manufacturer would like to share with everyone the advantages of water-ring vacuum pumps!

The manufacturer of liquid-ring vacuum pumps states that these pumps are equipped with an axial-force motor rotor featuring fixed blades. During operation, water (or liquid) is thrown onto the stator wall of the motor, forming a liquid ring that works in tandem with the motor stator. Together, the liquid ring and the rotor blades constitute a variable-capacity rotary vacuum pump with adjustable inlet capacity. The manufacturer further notes that liquid-ring vacuum pumps have a compact structure and relatively high rotational speeds; they can typically be directly connected to a motor without requiring any speed-reducing equipment. As a result, these pumps feature small overall dimensions, large drainage capacities, and a minimal footprint. Moreover, the compression of air within the pump chamber is largely isothermal, meaning the temperature of the compressed air remains virtually unchanged throughout the process. Since there are no metal-to-metal friction surfaces inside the pump cavity, lubrication is unnecessary, minimizing wear and tear. Additionally, the exhaust valve ensures immediate sealing between the rotating components and the stationary housing. Consequently, liquid-ring vacuum pumps offer advantages such as uniform suction, stable and reliable operation, and ease of use and maintenance. These pumps are widely used in various industries, including coal mining, chemical plants, pharmaceutical manufacturing, mining, paper production, food processing, brewing, decorative building materials, plastics, metallurgy, and electrical equipment manufacturing. Furthermore, liquid-ring vacuum pumps boast high pumping speeds and can generally be directly coupled to motors without the need for speed-reducing devices. Thus, liquid-ring vacuum

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2023-02-03

Working Principle and Installation Considerations for Reciprocating Vacuum Pumps in Shandong

The Shandong reciprocating vacuum pump is a low-vacuum device used to extract gases from containers where the internal pressure is equal to or lower than one atmosphere. The temperature of the gas being pumped generally does not exceed 35°C. The ultimate pressure achievable by a reciprocating pump ranges from 4102 to 100 Pa for single-stage pumps and can reach as low as 1 Pa for two-stage pumps. The pump boasts a large displacement, with pumping speeds ranging from 15 to 5500 L/s. Reciprocating pumps are widely used in applications such as vacuum impregnation, vacuum treatment of molten steel, distillation, crystallization, and filtration. Next, let’s take a closer look at the working principle and installation considerations for the Shandong reciprocating vacuum pump. I. Structure and Working Principle of the Shandong Reciprocating Vacuum Pump: 1. Main Components: The vacuum pump cylinder, piston, piston rod, suction valve, and discharge valve. 2. Working Principle: When the piston moves from left to right, a negative pressure is created inside the vacuum pump cylinder, causing liquid from the storage tank to enter the cylinder through the suction valve. As the piston moves from right to left, the liquid inside the cylinder is compressed, increasing the pressure and forcing it out through the discharge valve. Each reciprocating motion of the piston—during which liquid is alternately drawn into and expelled from the cylinder—constitutes one working cycle; this...

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2022-12-29

What are the key points to note when using a liquid-ring vacuum pump? Here’s what the liquid-ring vacuum pump manufacturer has to say.

The manufacturer of liquid-ring vacuum pumps says that these pumps have a wide range of applications, so it’s essential to understand the operational precautions before using them. Only by doing so can you make better use of them. If you’re interested in this topic, let’s take a closer look together—it might be helpful for those who are involved. The manufacturer of liquid-ring vacuum pumps points out that these pumps are widely used across various industries, making their broad application all the more important. In fact, the specific type of liquid-ring vacuum pump is primarily determined by the medium being pumped, the required gas flow rate, the desired vacuum level, or the exhaust pressure. When using a liquid-ring vacuum pump, it’s crucial to ensure that the selected pump’s vacuum level is as high as possible—that is, the pump should operate within its critical zone, where the required vacuum level or critical exhaust pressure is achieved. Only under these conditions can the vacuum pump function properly and meet the intended requirements. Avoid operating the vacuum pump near its maximum vacuum or exhaust pressure range. Operating in this region not only results in extremely low efficiency but also makes the pump highly unstable; sometimes, it can easily cause vibrations and noise. When a liquid-ring vacuum pump with a high vacuum level operates in this region, cavitation often occurs. An obvious sign of cavitation is the noise and vibration generated inside the pump. Excessive cavitation can damage components such as the pump body and impeller, eventually rendering the vacuum pump unusable.

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2022-12-23

The water-ring vacuum pump manufacturer would like to share with you some important considerations for the installation and maintenance of water-ring vacuum pumps.

The manufacturer of liquid-ring vacuum pumps says that, with the rapid development of urban planning and construction, these pumps are widely used in various fields and offer advantages such as long service life and low investment costs. However, as product performance requirements become increasingly stringent, the technical demands for operation have also risen. Next, let’s take a look at the precautions to be observed during the installation of liquid-ring vacuum pumps. 1. The liquid-ring vacuum pump should be installed on a solid, level surface with sufficient surrounding space to facilitate inspection and maintenance. 2. The foundation elevation should be kept below the base level. It is recommended to place vibration-damping rubber pads at the four corners of the base or to cast bolts into the foundation to ensure smooth operation and minimize vibration. 3. Pipelines connected to the system must be reliably sealed. For small-sized products, oil-resistant rubber gaskets can be used for metal pipe connections, and vacuum hoses can also be employed for connections. However, the pipe diameter must not be smaller than the pump’s suction diameter, and the pipelines should be short with as few bends as possible. 4. During pipeline connection, users can install valves and vacuum gauges above the inlet port to monitor pressure at any time. 5. According to the motor’s markings, connect the power supply, ground wire, and install the appropriate…

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2022-12-19

Seven Reasons Affecting Insufficient Vacuum Levels in Shandong Vacuum Pumps

Seven Reasons for Insufficient Vacuum in Shandong Vacuum Pumps: 1. The impeller of the Shandong vacuum pump is damaged, resulting in insufficient contact area when rubbing against the cylinder head and thus leading to inadequate vacuum levels. 2. The cylinder head is damaged, potentially causing internal cavities within the cylinder head to become impaired and consequently reducing the vacuum level. 3. The rotor of the motor has shifted. Misalignment between the motor rotor and the bearing end cover during installation can cause insufficient vacuum; this issue can be corrected by having the manufacturer perform calibration. 4. Steam leakage in the Shandong vacuum pump. After prolonged use, the sealing gaskets may age, leading to steam leakage and a drop in vacuum levels. 5. There may be an issue with the motor itself. If the motor speed is abnormal, its pumping rate will slow down, which could result in insufficient vacuum. 6. Emulsification or carbonization of the vacuum pump oil. If the vacuum pump is not regularly disassembled and maintained manually over a long period of use, the vacuum pump oil may become emulsified or carbonized, potentially causing damage to the pump’s cylinder head, blockage of oil lines, clogging of oil filters, and other related problems.

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