Overview of SK vacuum pump:

Pumps and compressors are used to suction or compress air and other non corrosive, water-insoluble, and solid particle free gases, in order to create a vacuum and pressure in a closed container. A small amount of liquid is allowed to mix in the inhaled gas.

Working principle of SK vacuum pump:

As shown in the figure, the impeller 3 is eccentrically installed inside the pump body 2. Therefore, when the impeller 3 rotates, water is subjected to centrifugal force and forms a rotating water ring 5 on the inner wall of the pump body. The upper inner surface of the water ring is tangent to the hub and rotates in the direction of the arrow. During the first half of the rotation, the inner surface of the water ring gradually separates from the hub, forming a closed space between the impeller blades and the water ring. As the impeller rotates, the space gradually expands, the gas pressure in the space decreases, and gas is introduced into the space; During the second half of the rotation, the inner surface of the water ring gradually approaches the hub, and the space between the blades gradually shrinks. The gas pressure in the space increases, and when it is higher than the exhaust port, the gas between the blades is discharged. In this way, every time the impeller rotates, the space between the blades is sucked and discharged once, and many spaces work continuously. The pump continuously sucks or compresses gas.

Due to the generation of heat during work, the working water ring will generate heat, and some water and gas will be discharged together. Therefore, it is necessary to continuously supply water to the pump during work to cool and replenish the water consumed in the pump, in order to meet the working requirements of the pump.

When the gas discharged by the pump is no longer used, a gas water separator (which can be replaced by a self-made water tank) is connected to the exhaust end of the pump. After the wastewater and some of the carried water are discharged into the gas water separator, the gas is separated and the gas is discharged through the exhaust pipe. The remaining water is supplied to the pump through the return pipe for continued use. With the extension of working hours, the temperature of the working water will continue to rise. At this time, a certain amount of cold water (tap water) needs to be supplied from the water supply of the gas water separator to reduce the temperature of the working water and ensure that the pump can meet the required technical requirements and indicators.

When used as a compressor, the pump exhaust port is connected to a gas water separator, and the gas water mixture automatically separates after entering the gas water separator. The gas is transported to the required system through the exhaust pipe, and the working water is automatically released through the overflow switch. When compressing the gas, the working water is prone to heat up, and the water is discharged from the pump outlet, causing the temperature to become higher. Therefore, at the bottom of the gas water separator, cold water should be continuously supplied to supplement the released hot water, while also playing a cooling role to prevent the working water temperature from being too high, thereby ensuring the performance of the compressor, achieving technical indicators, and meeting process requirements.

The purpose of SK vacuum pump:

Widely used in the fields of machinery, petroleum, food, sugar industry, and electronics. Due to the isothermal compression process of gas during operation, it is less prone to danger when compressing and suctioning explosive gases, making it more widely used.

The working vacuum range is -0.03-0.08MPa.

Compact structure and easy maintenance;

Widely applicable, it can extract various gases containing water vapor, flammable, explosive, small amounts of dust, and small amounts of liquid;

Mainly using water as the working medium, with low maintenance costs;

Can work in harsh environments.

SKvacuum pumpPerformance Table:

model	swept volume(m3/min)		limiting pressure	Motor power（kW)	pump speed	Suction and exhaust diameter	Pump weight	Recommend alternative products
	Maximum gas volume	The suction pressure is-0.041MPatime	(mmHg)	kw	(r.p.m)	(mm)	(complete machine)(Kg)
SK-0.15	0.15	0.12	-670	0.75	2850	G1'	30	2BV2060
SK-0.4	0.4	0.36	-670	1.5	2850	G1'	50	2BV2060
SK-0.8	0.8	0.75	-670	2.2	2850	G1'	80	2BV2061
SK-1.5	1.5	1.35	-700	4	1440	70	200	2BV5110
SK-3	3	2.8	-700	5.5	1440	70	320	2BV5111
SK-6	6	5.4	-700	11	1440	80	460	2BV5131
SK-12	12	10.8	-700	18.5	970	80	750	2BE1 202-970
SK-20	20	18	-700	37	730	150	1700	2BE1 203-970
SK-30	30	27	-700	55	730	150	2300	2BE1 252-740
SK-42	42	37.8	-700	75	730	150	2500	2BE1 253-740
SK-60	60	54	-700	95	550	250	3500	2BE1 303-740
SK-85	85	76.5	-700	132	550	250	3800	2BE1 353-592
SK-120	120	108	-700	185	490	300	5520	2BE3 420-390

SK vacuum pump curve diagram:

SK vacuum pump size diagram:

SK vacuum pump maintenance:

1. The packing should be regularly compressed. If the packing cannot guarantee the required sealing due to wear, it should be replaced with a new packing. The packing should not be compressed too tightly. Normally compressed packing allows water to drip out. But the quantity should not be too much, and oil immersed asbestos rope should be used as filler.

2. Ball bearings should have good working conditions, and their working temperature should not be higher than the surrounding temperature by 35 ℃, but the measured temperature value should not exceed 70 ℃. 2/3 of the entire space in the bearing chamber should be filled with butter. For normal working bearings, oil should be added 3-4 times a year, the bearings should be cleaned at least once a year, and all lubricating oil should be replaced.

8、 Disassembly and assembly of pumps

1） Disassembly:

The disassembly of the pump is divided into partial disassembly inspection and cleaning, and complete disassembly repair and replacement of parts. Before dismantling, all water in the pump should be drained. When disassembling, various sealing gaskets should be carefully removed. If damage is found, new gaskets of the same thickness and material should be replaced. When disassembling, marks should be made on the parts to ensure correct installation. The disassembly sequence is as follows (see Figure 2).

1. Firstly, disconnect the pump from the system pipeline, separator, motor, and base, and place the pump head on a flat plate.

2. Remove the connecting pipe.

3. For ease of disassembly, the pump should be placed upright with the drive end facing downwards as much as possible.

4. Remove the rear bearing cover 1 (Figure 2), and remove the bearing frame 3 (Figure) along with the bearing.

5. Remove all tightening bolts and remove the non drive end cover along with the disc fixed to the end cover.

6. Remove pump body 5 (Figure 2), short impeller back cap, short impeller 16 (Figure 2, middle walls 6 and 7, shaft sleeve 520, and long pump body 9 (Figure 2) in sequence,

Long impeller (as shown in Figure 2, if long impeller 17 and shaft 2 do not need to be replaced, please do not remove the long impeller from the shaft).

7. Lie down the remaining part, as shown in Figure 2, take pump coupling 18, front axle pressure cover 13, front axle support frame 3, and front end cover 4. At this point, the entire disassembly is complete

The department is over.

During disassembly, special attention should be paid to whether the gap between the end faces of the two impellers and the pump cover and middle wall is appropriate, and the thickness of the cushion should be appropriately increased or decreased according to its size.

2） Assembly:

Before assembly, the parts should be cleaned and oil should be applied to the mating surfaces and threads. Old oil should be removed from the ball bearings and bearing seats, and new oil should be added. Scrapped parts should be replaced. A new pad with the same thickness and material should be manufactured, and the damaged old pad should be replaced.

The order of pump assembly is opposite to the order of disassembly, but the following points should be noted:

1. In Figure 2, the bearing on the drive end is a positioning bearing, which must be fixed properly and adjusted with adjusting pad 11 to adjust the long impeller 17 and the front

The gap between the end caps and the disk.

2. Pay attention to the uniform tightening force of the long tension bolt.

3. The key to assembling a two-stage water ring pump is how to ensure that the clearance between the two ends of the impeller meets the specified requirements. This gap is too large, too small, or not on both sides

Uniformity has a significant impact on the performance of the pump, especially the pumping volume, and may even cause malfunctions such as blockage or blade breakage due to friction between adjacent parts on both sides of the impeller. Therefore, it must be highly valued during assembly.

4. The clearance between the two end faces of the impeller should be: SK-1.5, SK-3, SK-6: 0.13-0.18, SK-12: 0.15-0.25, SK-20

SK-30 is 0.20-0.30

SK vacuum pump products hot selling cities: Jiangsu, Shandong, Henan, Zhejiang, Hebei