Product Description
Working principle
Roots pumps with pre-admission cooling mainly consists of rotor 1 and 2, pump body 4, gas cooler 7, etc(see figure below). Due to its special internal structure design, it can operate reliably for a long time under high differential pressure and high compression ratio.
The cooling gas enters the suction chamber of the pump from both sides of the pump body so that the pump does not overheat due to the compressed gas, but has no effect on the pumping performance. The figure below shows the rotor rotating 120 degrees in the pump chamber and completing 1 suction and exhaust.
Cooler and motor are necessary accessories for each pump, and the specifications of cooler and motor are based on different working conditions. The pumps can be used individually or in series, or in combinations with liquid ring vacuum pumps and Roots vacuum pumps to achieve higher vacuum to meet various process requirements.
Main features
1. When used alone, the working vacuum can reach 150 mbar in direct discharge to atmosphere.
2. Multi-stage tandem or tandem with other backing pumps can reach medium vacuum.
3. Special structure design ensures that the pump will not overheat and overload when operating at high differential pressure and high compression ratio.
4. Tri-Lobe profile and high precision machining ensure smooth and quiet operation.
5. Pumping performance, noise, vibration and other major performances are much improved than the traditional two-lobe pump.
6. An optional advanced balanced mechanical seal makes the pump sealing performance more reliable than the traditional lip seal.
7. The pump housing is oil-free structure, which is suitable for pumping out general air and various special gases.
8. Compared with other mechanical vacuum pumps, the energy-saving is up to 20%.
Product Parameters
| Type | Nominal pumping speed(50Hz) | Ultimate pressure | Nominal motor rating (50Hz) | Nominal motor speed (50Hz) | Suction Connection size | Discharge Connection size | Maximum cooling water required |
Weight (Without Motor) |
| L/s | Pa | Kw | rpm | mm | mm | L/h | Kg | |
| ZJTQ-150 | 150 | 15000 | 3~18.5 | 2900 | 80 | 80 | 3500 | 350 |
| ZJTQ-300 | 300 | 15000 | 5.5~37 | 2900 | 125 | 125 | 6000 | 350 |
| ZJTQ-600 | 600 | 15000 | 7.5~75 | 1460 | 250 | 200 | 9000 | 650 |
| ZJTQ-1200 | 1200 | 15000 | 11~132 | 1470 | 300 | 250 | 15000 | 1200 |
| ZJTQ-2500 | 2500 | 15000 | 22~280 | 980 | 350 | 350 | 28000 | 2300 |
| ZJTQ-3750 | 3750 | 15000 | 30~400 | 1470 | 350 | 350 | 35000 | 2300 |
Note: The motor power and cooler surface area are determined by the working differential pressure, and different motors and coolers can be configured for different differential pressures.
Pressure diagram
Dimension
| Model | DN | DNI | A | A] | A2 | A3 | B | B1 | B2 | H | H1 | H2 | Φ |
| ZJTQ-150 | 80 | 80 | 554 | 281 | 55 | 132 | 358 | 300 | 210 | 340 | 170 | 20 | 32 |
| ZJTQ-300 | 125 | 125 | 652 | 325 | 60 | 185 | 428 | 360 | 240 | 405 | 215 | 25 | 42 |
| ZJTQ-600 | 250 | 250 | 965 | 492 | 90 | 296 | 678 | 560 | 370 | 630 | 210 | 50 | 60 |
| ZJTQ-1200 | 300 | 300 | 1236 | 642 | 117 | 440 | 770 | 650 | 450 | 680 | 230 | 50 | 85 |
| ZJTQ-2500 | 350 | 300 | 1465 | 763 | 128 | 616 | 942 | 730 | 612 | 880 | 415 | 65 | 90 |
| ZJTQ-3750 | 400 | 350 | 1730 | 925 | 130 | 820 | 980 | 800 | 600 | 880 | 265 | 70 | 105 |
FAQ
Q: What information should I offer for an inquiry?
A: You can inquire based on the model directly, but it is always recommended that you contact us so that we can help you to check if the pump is the most appropriate for your application.
Q: Can you make a customized vacuum pump?
A: Yes, we can do some special designs to meet customer applications. Such as customized sealing systems, speical surface treatment can be applied for roots vacuum pump and screw vacuum pump. Please contact us if you have special requirements.
Q: I have problems with our vacuum pumps or vacuum systems, can you offer some help?
A: We have application and design engineers with more than 30 years of experience in vacuum applications in different industries and help a lot of customers resolve their problems, such as leakage issues, energy-saving solutions, more environment-friendly vacuum systems, etc. Please contact us and we’ll be very happy if we can offer any help to your vacuum system.
Q: Can you design and make customized vacuum systems?
A: Yes, we are good for this.
Q: What is your MOQ?
A: 1 piece or 1 set.
Q: How about your delivery time?
A: 5-10 working days for the standard vacuum pump if the quantity is below 20 pieces, 20-30 working days for the conventional vacuum system with less than 5 sets. For more quantity or special requirements, please contact us to check the lead time.
Q: What are your payment terms?
A: By T/T, 50% advance payment/deposit and 50% paid before shipment.
Q: How about the warranty?
A: We offer 1-year warranty (except for the wearing parts).
Q: How about the service?
A: We offer remote video technical support. We can send the service engineer to the site for some special requirements.
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| After-sales Service: | Online Video Instruction |
|---|---|
| Warranty: | 1 Year |
| Nominal Pumping Speed(50Hz): | 600 L/S |
| Ultimate Pressure: | 15000 PA |
| Nominal Motor Rating(50Hz): | 7.5~75 Kw |
| Nominal Motor Speed(50Hz): | 1460 Rpm |
Disadvantages of using a vacuum pump
A vacuum pump is a device that pulls gas molecules out of a volume and leaves a partial vacuum. Its main function is to create a relative vacuum within a given volume. There are several types of vacuum pumps. Some of them are better suited for specific purposes than others. However, there are some disadvantages to using a vacuum pump.
Application of vacuum pump
Vacuum pumps are invaluable tools in many industrial and scientific processes. They are often used to move gas and other harmful substances and to clear clogged drains. They are also used to support mechanical equipment. For example, they can be mounted on the engine of a motor vehicle or the power hydraulic component of an aircraft. No matter how they are used, they should fit the application.
The principle of a vacuum pump is to draw gas from a sealed chamber to create a partial vacuum. Over the years, vacuum pump technology has evolved from its original beginnings to its current form. Today, there are many types of vacuum pumps, including rotary vane pumps, momentum transfer pumps, and regeneration pumps.
The semiconductor industry is a major user of vacuum pumps. Among other applications, these pumps are commonly used for mounting circuit boards, securing components, blowing and jetting, and pumping. The use of renewable resources has paved the way for widespread semiconductor production, where vacuum pumps are crucial. This manufacturing shift is expected to boost vacuum pump sales across Europe. 
The most common types of vacuum pumps are positive displacement and rotary vane pumps. Positive displacement pumps are most effective for rough vacuum applications and are usually paired with momentum transfer pumps. These pumps are used in pharmaceutical, food and medical processes. They are also used in diesel engines, hydraulic brakes and sewage systems.
Positive displacement pumps are used to create low vacuum conditions and create a partial vacuum. These pumps create lower air pressure by enlarging the chamber and allowing gas to flow into the chamber. The air in the cavity is then vented to the atmosphere. Alternatively, momentum transfer pumps, also known as molecular pumps, use high-speed rotating blades to create dense fluids. 
Their drawbacks
Vacuum pumps are useful in industrial applications. However, they are not perfect and have some drawbacks. One of them is that their output is limited by the vacuum hose. Vacuum hoses are the bottleneck for vacuum pump performance and evacuation rates. The hose must be kept free of water and organic matter to ensure the highest possible vacuum.
Dry vacuum pumps do not have these problems. They may be more cost-effective but will increase maintenance costs. Water consumption is another disadvantage. When pond water is used, the pump puts additional pressure on the treatment facility. Additionally, contaminants from the gas can become trapped in the water, shortening the life of the pump.
Another disadvantage of vacuum pumps is their limited operating time at low vacuum. Therefore, they are only suitable for extremely high vacuum levels. Diaphragm pumps are another option for industrial applications. They have a sealed fluid chamber that allows a moderate vacuum. They also feature short strokes and a low compression ratio, making them quieter than their reciprocating counterparts.
Vacuum pumps are used in many industrial and scientific processes. They can be used to transport hazardous materials or clear clogged drains. They are also used in rear doors and dump tanks. Certain types of vacuum pumps can cause fluid blockages, which can be harmful. The vacuum pump should also be well suited to the fluid in it to avoid contamination.
Another disadvantage is the lack of proper vacuum system testing equipment. Mechanics often underestimate the importance of a properly functioning vacuum system. Most stores lack the equipment needed for proper troubleshooting. Typically, mechanics rely on the cockpit vacuum gauge to determine if the pump is working properly.
Some vacuum pumps are capable of providing constant vacuum. These pumps are also capable of eliminating odors and spills. However, these advantages are outweighed by some disadvantages of vacuum pumps.
editor by CX 2024-03-27