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About UsFUTEN was established in 2011, specializing in the research and development of vacuum pumps and vacuum application technology.
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ProductsOur main products are vacuum acquisition equipment and composite vacuum systems, providing customers with advanced vacuum industry application system solutions.
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BusinessThe existing products not only serve customers in basic industrial fields such as scientific research, petroleum and petrochemical, coal, paper, chemical, pharmaceutical, power, tobacco, new energy, new materials, electronic semiconductors, etc.
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CaseCommitted to becoming a brand of application system solutions for the vacuum industry.
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RecruitFUTEN is committed to becoming the preferred brand for application system solutions in the vacuum industry. The company adheres to a people-oriented approach, creates value, and pursues excellence.
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Contact UsPursuing innovation, customer first, fast professionalism, and outstanding talents.
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Address: No. 48 Fengxia Road, Shuangfeng Economic Development Zone, Hefei City, Anhui Province
Business TikTok: 87793105475 / 66296077970
TEL: +86-551-65684227
Roots Liquid Ring Vacuum Pump Unit
- Description
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The Roots vacuum pump is a positive-displacement rotary vacuum pump that operates without internal compression, also known as a mechanical booster pump. A typical Roots liquid-ring vacuum unit consists of a Roots pump (the main pump) connected in series with a liquid-ring pump (the forepump). The Roots pump achieves gas suction through two synchronously rotating, counter-rotating impeller-shaped rotors, while the liquid-ring pump completes gas compression and discharge by cyclically varying the volume of its pumping chamber. When used in tandem, this configuration enables operation across a broader pressure range and delivers significantly higher pumping efficiency. Additionally, the system can be customized to include instrumentation, condensers, control units, piping, valves, and fully or partially recirculating working fluid systems—providing customers with tailored, comprehensive solutions.
Overview
A standard Roots vacuum pump cannot be used alone and must be paired with a suitable forepump to form a complete system. The primary function of the forepump is to reduce the discharge pressure of the Roots vacuum pump, ensuring that the inlet-to-outlet pressure difference and compression ratio of the Roots unit remain within a specific range. Since the Roots pump has a limited compression ratio, selecting an appropriately sized forepump with the right pumping speed is crucial. Note that the maximum compression ratio of a Roots vacuum pump varies depending on the discharge pressure—typically around 3:1 at higher discharge pressures. In contrast, when combined with a liquid-ring forepump, the Roots vacuum unit can achieve a much higher compression ratio, often reaching up to 40:1 or even higher.
Since Roots vacuum pumps have a relatively low compression ratio, to achieve higher vacuum levels and greater pumping speeds, multiple Roots vacuum pumps can be connected in series with a forepump to form a multistage Roots vacuum pump unit, thereby meeting the demands of high-vacuum applications. The number of stages in the vacuum unit is determined by the desired working vacuum level—typically, the ultimate vacuum of the system should be half to one order of magnitude higher than the actual working vacuum. Additionally, since different vacuum systems operate at varying pressure ranges, it’s crucial to keep the following key points in mind when selecting and configuring the appropriate pump unit.
1. The main pump must operate within its optimal performance range;
2. The compression ratio of the main pump or intermediate pump relative to the backing pump must not exceed the allowable range;
3. The ratio between the forepump and the first-stage Roots pump should be kept as low as possible, ensuring that a decline in the forepump's performance will not significantly affect the system's overall vacuum capability.
Type/Model
Pumping rate
(I/s)Extreme Pressure
(pa)Unit assembly pump model
Rated power consumption
(kw)Intake port diameter
(mm)Exhaust port diameter
(mm)Main pump
Intermediate pump
Preliminary-stage pump
2FW4-70-180
70
650
ZJB-70
2FV5-180
5.5
80
50
2FW4-70-70-180
70
25
ZJB-70
ZJB-70
2FV5-180
7
80
50
2FW4-150-70-180
150
25
ZJB-150
ZJB-70
2FV5-180
8.5
100
50
2FW4-150-400
150
650
ZJB-150
2FV5-400
14
100
65
2FW4-300-500
300
650
ZJB-300
2FV5-500
19
150
80
2FW4-300-150-400
300
25
ZJB-300
ZJB-150
2FV5-400
18
150
65
2FW4-600-150-400
600
25
ZJB-600
ZJB-150
2FV5-400
19.5
200
65
2FW4-1200-300-500
1200
25
ZJB-1200
ZJB-300
2FV5-500
30
250
80
2FW4-600-300-150-400
600
1
ZJB-600
ZJB-300
ZJB-1502FV5-400
23.5
200
65
2FW4-1200-300-150-400
1200
1
ZJB-1200
ZJB-300
ZJB-1502FV5-400
29
250
65
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Product Inquiry
Address: No. 48 Fengxia Road, Shuangfeng Economic Development Zone, Hefei City, Anhui Province
Website: www.hkfuten.com
Business TikTok: 87793105475 / 66296077970
Tel: +86-551-65684227