Circulating Water Vacuum Pump

Circulating water vacuum pump is a kind of vacuum pump. It is a supporting equipment for extraction equipment such as rotary evaporator, glass reactor and short path distillation,etc.Our circulating water vacuum pumps are available in desktop and vertical types. The desktop is suitable for small extraction equipment, and the vertical type is suitable for large extraction equipment.

Circulating water vacuum pump working principle

The working medium of the circulating water suction vacuum pump is water, which belongs to the centrifugal mechanical pump. The impeller rotor is installed in the cylindrical pump casing. Its blades are forward curved. when the impeller rotates. Under the action of centrifugal force, water forms a water ring that swirls along the pump casing. The water ring runs relative to the blades. The space volume between two adjacent blades changes periodically. When the blade rotates from top right to bottom. The water between the two leaves is pushed outwards. Make the volume of this space gradually increase from small to large. It reaches the maximum when it reaches the bottom. So the gas is sucked in from the axial suction port. And when the blade rotates from the bottom to the top left. The water moves relative to the axis. The space between the two blades gradually changes from large to small. The inhaled gas is gradually compressed and finally discharged through the exhaust port. With the stable rotation of the impeller. Each volume wheel changes repeatedly. Continue the suction and exhaust process.

Models and components of circulating water vacuum pump

The circulating water vacuum pump is divided into a vertical circulating water vacuum pump and a desktop circulating water vacuum pump. There are two models of the desktop circulating water vacuum pump: SHZ-D (two meters and two taps) and SHZ-D (four meters and four taps). There is one type of circulating water vacuum pump: SHZ-C. The circulating water vacuum pump is composed of a water tank, a water pump, a pressure gauge, a check valve and other components. It is designed with circulating water as the working fluid and the principle of negative pressure generated by jet flow.

1. Multi-meter multi-tap design, can be used alone or in parallel.

2. The pump head is made of corrosion-resistant material.

3. The shell is made of high-strength ABS engineering plastic at one time.

4. The core motor part is stainless steel motor shaft, which will not rust after long-term work.

5. Turbine ducted structure to ensure the fastest and fastest passage of water flow.

6. Equipped with a fluid muffler to reduce the friction noise between gas and liquid in water.

7. All-copper coil AC motor, with a cooling fan at the rear, which can work continuously.

8. A check valve is installed on the pumping line to prevent accidental shutdown during vacuuming.

Steps of using the circulating water vacuum pump

1. Preparatory work: Place the multi-purpose vacuum pump for water circulation on the workbench. When using it for the first time, open the upper cover of the water tank and inject clean cold water (you can also add water through the drain hose). When the water surface is about to rise to the height of the overflow nozzle behind the water tank Stop adding water when the machine is turned on again. Change the water at least once a week. If the water quality is seriously polluted and the usage rate is high, the water replacement time must be shortened to keep the water in the water tank clean.

2. Vacuum work. Tightly sleeve the suction sleeve of the equipment that needs to be vacuumed on the suction nozzle of the machine, turn off the cycle switch, turn on the power supply, and turn on the power switch to start the vacuuming operation. The degree of vacuum can be observed.

3. When the multi-purpose vacuum pump for water circulation needs to operate continuously for a long time, the water temperature in the water tank will increase, which will affect the vacuum degree. At this time, the water discharge hose can be connected to the water source (tap water), and the overflow nozzle can be used as a drainage outlet. The flow of tap water can keep the water temperature in the water tank from rising so that the vacuum degree is stable.

4. When it is necessary to provide cooling circulating water for the reaction device, based on the operation in the previous item 3, connect the water inlet and outlet pipes of the device to be cooled to the circulating water outlet and inlet nozzles at the rear of the machine respectively. , turn the circulating water switch to the ON position, and the circulating cooling water supply can be realized.

Features of circulating water vacuum pump

1. The water-saving effect is obvious. Due to the use of water circulation, the water added to the water tank can be recycled. It overcomes the phenomenon that a lot of water is wasted when the vacuum is obtained by directly flushing tap water. According to the actual measurement, based on the continuous operation of one working day, under the condition of reaching the same vacuum degree, the use of this product can save more than 10 tons of water, and it can be used for a long time by adding water once. room is especially suitable.

2. Multi-functional comprehensive use, in addition to providing vacuum conditions, the circulating water suction vacuum pump can also perform external circulation operations at the same time to provide circulating cooling water for the reaction device. This machine is connected to the tap water source, and by injecting an appropriate amount of water source, the temperature and water quality of the vacuum circulating water can be kept unchanged under the condition of continuous operation for a long time, which can not only ensure that the vacuum degree does not drop, but also realize the supply of circulating cooling water.

3. The shape is new and easy to use. The pump head of this machine is directly immersed in water, the whole machine is low in height, small in size, light in weight, by placing it on the workbench, it is easy to move, operate, and observe.

4. The machine is equipped with two air extraction nozzles, which can be operated independently or at the same time. Each air extraction nozzle is equipped with a vacuum gauge, which can easily observe the degree of vacuum. When the vacuum operation is stopped unexpectedly, the circulating water returns to the vacuumed equipment.

5. Corrosion-resistant, the parts of the vacuum pump of the circulating water absorber are made of stainless steel, which is not affected by corrosive substances such as acid and alkali, and also does not pollute the laboratory such as oil pollution.

6. The machine operates stably and reliably with low noise.

7. The main components of this vacuum pump are made of stainless steel and anti-corrosion materials.

Advantages of circulating water vacuum pump

Multifunctional comprehensive effect. The circulating water vacuum pump can not only provide vacuum conditions but also perform external circulation operations to provide circulating cooling water for the reaction device. By connecting the circulating vacuum pump to the tap water source and adding an appropriate amount of water injection source, it is possible to prevent the temperature and quality of the circulating vacuum water from changing during long-term continuous operation. It not only reliably lowers the vacuum level, but also realizes the supply of circulating cooling water.

2. The water-saving effect is obvious. Due to the use of water circulation operation, the water added to the water tank can be recycled, thereby overcoming the phenomenon of a large amount of water wasting when the vacuum is obtained by directly flushing tap water. According to the actual measurement, it is calculated by continuous operation for one working day. Using this product under the condition of reaching the same vacuum degree can save more than 10 tons of water, and it can be used for a long time after adding water once. Especially suitable for laboratories with inadequate water sources and pressure.

3. The circulating water vacuum pump is equipped with two air extraction nozzles, which can be operated independently or at the same time. Each suction nozzle is equipped with a vacuum gauge to easily observe the degree of vacuum, and a check valve is installed on the suction line to prevent the circulating water from flowing back into the vacuumed equipment when the vacuuming operation is stopped unexpectedly.

4. Corrosion-resistant and pollution-free. The pump parts of the circulating water vacuum pump are made of stainless steel, which is not affected by corrosive substances such as acid and alkali and does not produce any oil stains and impurities that pollute the laboratory.

Precautions for the use of circulating water vacuum pump

1. Keeping the water clean is the key to the long-term stable operation of the equipment.

2. The water must be changed and the water tank cleaned regularly. Dust and solid substances cannot be extracted.

3. Some corrosive gases can cause the water quality in the water tank to deteriorate, generate air bubbles, and affect the vacuum degree, so attention should be paid to continuous water replacement.

4. For special strong corrosive gases, carefully judge whether it reacts with the materials used in this equipment, and use them with caution.

5. If the vacuum level does not go up, you should first judge whether it is leaked by the pumping container or the hose connection is loose. If it is a problem with the pump, check whether the water inlet or each air circuit is blocked or loose and leaking.

6. If the motor of the circulating water vacuum pump does not rotate, the power supply or fuse should be checked.

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