EPVS系列水环真空泵结构特点说明：
EPVS series water ring vacuum pump structure features:
采用锥体双级设计，从根本上防止了汽蚀对泵的损害。
Adopt cone double-stage design, prevent cavitation damage to pump fundamentally.
较低的轴功率和双级设计降低了工作液的温升，使气泡的产生的数量降低。
The lower shaft power and two-stage design reduce the temperature rise of the working fluid and reduce the amounts of bubbles produced.
较低的叶轮线速度，使气泡产生的可能性降低。
Lower linear velocity of impeller reduces the possibility of bubble formation.
双级设计，降低了压缩比，防止了气泡的破裂。
The two-stage design reduces the compression ratio and prevents the bursting of bubbles.
特殊的锥体和叶轮的设计，锥体的排气口升入叶轮的内部，气泡在未能破裂的情况下已排到锥体的排气口，对叶轮没有冲击。
Special cone and impeller design, the cone of the exhaust port rise into the impeller inside, bubble in failed to break when discharged to the cone of the exhaust port, no impact on the impeller.
锥体真空泵由于锥体结构的特殊设计，使真空泵的进、排汽口通道较大，这就允许更多的液体夹带。对于凝汽器抽真空的场合，更适合使用锥体双级真空泵。
More liquid entrainment allowed because of the cone structure specially designed with larger channel of inlet and exhaust steam port of the cone vacuum pump. For the situation of condenser vacuuming, it is more suitable to use the two-stage cone vacuum pump.
在真空泵的入口处加冷凝喷嘴，对真空泵吸入口的气体进行预冷却，冷却大部分的水蒸汽，减小了吸入介质的体积流量，从而提高真空泵的抽干空气能力。
The condensing nozzle added at the inlet of the vacuum pump to pre-cool the gas at the inlet of the vacuum pump, cooling most of the water vapor, reducing the volume flow of the suction medium, so as to improve ability to drain air of the vacuum pump.
单双级自动切换设计，使锥体双级真空泵的效率更高。
Single and double stage automatic switch designed makes the cone double stage vacuum pump with better efficiency.
锥体泵启动电流小。
Starting current of taper pump is smaller.
平圆盘泵的排气口在泵的上部，所以叶轮偏于泵的上部，静止时液位较高，因而启动电流大。锥体开口真空泵的排气口在泵的下部，所以叶轮偏于泵的下部，静止时液位较低，因而启动电流小，在节能的同时也延长了电机使用寿命。
The exhaust port of the flat disk pump is in the upper part of the pump, so the impeller is partial to the upper part of the pump, and the liquid level is higher at rest, so the starting current is bigger. The exhaust port of the cone opening vacuum pump is in the lower part of the pump, so the impeller is inclined to the lower part of the pump, and the liquid level is low at rest, so the starting current is smaller, which not only saves energy but also extends the service life of the motor.
锥体泵允许有更大的磨损，
Cone pumps allow for more wearing.
真空泵运行多年时，叶轮不可避免地要产生磨损。试验表明，当叶轮与进口间隙增大0.0075英寸(0.2mm)时，锥体泵抽气能力仅下降2%，而平圆盘泵要下降5%。
When the vacuum pump runs for many years, the impeller inevitably be worn. Experiments show that when the clearance between impeller and inlet increases by 0.0075 inch (0.2mm), the pumping capacity of cone pump decreases by 2%, while that of flat disc pump decreases by 5%.
锥体双级真空泵有较高的极限真空度。
Cone double - stage vacuum pump has better limiting vacuum.
锥体部分特殊的真空铲斗设计使从排气口回流的气体经引流通道回到排气口，从而使真空泵保持较高的极限真空。
The cone part of the special vacuum bucket design from the exhaust back through the drainage channel back to the exhaust, so that the vacuum pump to maintain better limiting vacuum.
锥体式真空泵的节能效果明显
The energy-saving effect of cone vacuum pump is obvious
低运行费用带来的良好的经济性——总成本低
Good economics with lower overhead---the lowest total cost
对设备等固定资产投资而言，总成本是采购成本与使用成本（运行费用）之和。而使用成本（运行费用）=折旧＋水电等消耗＋维护费用及备品备件费用＋不可预见的故障处理及维修费用＋非计划的装置停运费用
For fixed asset investment such as equipment, the total cost is the sum of purchase cost and use cost (operation cost). Cost of use (operating expenses) = depreciation + utilities + maintenance and spare parts costs + unforeseen troubleshooting and repair costs + unplanned plant outage costs
武汉威龙双级锥体泵高效，节能、可靠的特点。使此产品使用成本（运行费用）低。
Wuhan Weilong two-stage cone pump has the features of high efficiency, energy saving and reliability. Make this product with the best cost (running cost).
|
型号 Model |
转速 Speed r/min |
最大轴功率 Max. shaft power kw |
最低吸入绝压 Min. inlet AP mbar |
气量 Volume m3/h |
泵重 Pump weight kg |
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|
吸入绝压 Inlet AP 60mbar |
吸入绝压 Inlet AP 100mbar |
吸入绝压 Inlet AP 200mbar |
吸入绝压 Inlet AP 400mbar |
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|
饱和空气 saturated air |
饱和空气 saturated air |
饱和空气 saturated air |
饱和空气 saturated air |
|||||
|
EPVS200-0 |
890 |
24.5 |
28 |
1100 |
1150 |
1200 |
1150 |
|
|
980 |
29 |
1200 |
1300 |
1350 |
1300 |
|||
|
1170 |
42 |
1400 |
1450 |
1550 |
1570 |
|||
|
EPVS250-0 |
590 |
32 |
28 |
1450 |
1550 |
1550 |
1500 |
|
|
740 |
43 |
1700 |
1850 |
1900 |
1900 |
|||
|
880 |
52 |
2150 |
2200 |
2250 |
2200 |
|||
|
EPVS280-0 |
500 |
50 |
28 |
2200 |
2400 |
2400 |
2300 |
|
|
590 |
60 |
2600 |
2900 |
2800 |
2900 |
|||
|
660 |
70 |
2800 |
3100 |
3190 |
3190 |
|||
|
740 |
80 |
3000 |
3400 |
3400 |
3390 |
|||
|
EPVS300-0 |
500 |
60 |
28 |
2800 |
3100 |
3100 |
2900 |
|
|
590 |
80 |
3600 |
3800 |
3700 |
3650 |
|||
|
660 |
90 |
3800 |
4000 |
4050 |
4000 |
|||
|
740 |
100 |
4200 |
4400 |
44050 |
4400 |
|||
|
EPVS350-0 |
450 |
70 |
28 |
3300 |
3500 |
3500 |
3400 |
|
|
500 |
85 |
3600 |
3990 |
3950 |
3850 |
|||
|
550 |
90 |
3800 |
4200 |
4300 |
4250 |
|||
|
590 |
105 |
4100 |
4500 |
4550 |
4450 |
|||
|
EPVS400-0 |
400 |
110 |
28 |
3600 |
4200 |
4250 |
4500 |
|
|
450 |
127 |
4000 |
4600 |
4700 |
5200 |
|||
|
490 |
155 |
4200 |
5000 |
5200 |
5450 |
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