Asynchronous Water-cooled Series Roots Vacuum Pump
Upgrade your vacuum system with Ever-Power’s Water-Cooled Motor Roots Vacuum Pumps (ZJ/ZJP Series). Featuring zero leakage, high-temperature stability, and compact design. Ideal for semiconductor and coating applications.
The advanced solution for zero-leakage, high-temperature, and space-constrained industrial vacuum applications.
Product Overview: Innovation in Vacuum Technology
The ZJ and ZJP series Roots pump vacuum system represents a significant leap forward in vacuum engineering. While retaining the robust pumping capabilities of traditional Roots pumps, this series addresses critical industrial challenges such as oil leakage, heat dissipation, and installation footprint. By integrating a specialized water-cooled motor directly with the pump, Ever-Power has created a unit that is not only more efficient but also cleaner and more reliable.
Unlike standard industrial Roots vacuum pumps that rely on shaft seals and air cooling, this innovative design eliminates dynamic seals entirely. This makes it the premier choice for applications where environmental purity and equipment longevity are paramount, such as in the semiconductor and fine chemical industries.
Key Advantages of the Water-Cooled Design
- ✓
Zero Leakage Assurance: By eliminating the dynamic seal, we have removed the risk of oil leakage. The motor and vacuum pump form a fully enclosed space, ensuring zero leakage and a clean process environment. - ✓
Superior Water Cooling: The water-cooled design offers significantly higher heat dissipation efficiency compared to ordinary air-cooled motors. This results in lower operating temperatures and extended motor life. - ✓
High-Temperature Adaptability: Designed to perform reliably in harsh conditions, this pump is perfect for enclosed spaces or high-temperature environments where air-cooled pumps would overheat. - ✓
Compact Installation: The integrated design drastically reduces the external dimensions of the unit, saving valuable factory floor space.
Roots Vacuum Pump Working Principle
To understand why this pump is superior, one must look at the Roots vacuum pump working principle. A Roots pump is a positive displacement pump that utilizes two figure-eight shaped rotors. These rotors rotate in opposite directions within the housing, synchronized by a set of timing gears. Crucially, the rotors do not touch each other or the housing, allowing for high rotational speeds and oil-free operation within the pumping chamber.
In our water-cooled ZJ/ZJP series, this mechanism is driven by a canned motor. The stator of the motor is cooled by a water jacket, which efficiently removes the heat generated during the compression of gases. This allows the pump to operate at higher loads and pressure differentials without the thermal expansion issues that plague standard dry Roots vacuum pump designs.
This pump acts as a Roots booster vacuum pump. It effectively increases the pumping speed and improves the ultimate vacuum of the system when paired with a backing pump. It is designed to handle large volumes of gas at relatively low pressures, making it the workhorse of any multi-stage Roots vacuum pump system.
Main Performance Parameters
We offer two variations in this series: The ZJ-A/ZJP-A Series and the ZJ-B/ZJP-B Series. Please refer to the tables below to select the model that fits your Roots pump vacuum system requirements.
Series A Performance Table
| Model | Ultimate Pressure (Pa) | Pumping Speed (L/s) | Max Allowed Pressure Diff (hPa) | Inlet Diam (mm) | Outlet Diam (mm) | Motor Power (KW) | Recommended Backing Pump | Cooling Water (L/min) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| ZJ-600A | 5×10⁻² | 600 | 58 | 200 | 200 | 7.5 | 2H-70B 2H-150 | 8 | 500 |
| ZJ-1200A | 5×10⁻² | 1200 | 53 | 250 | 200 | 11 | 2H-150 | 10 | 650 |
| ZJP-600A | 5×10⁻² | 600 | 32 | 200 | 200 | 7.5 | 2H-70B 2H-150 | 8 | 573 |
| ZJP-1200A | 5×10⁻² | 1200 | 44 | 250 | 200 | 11 | 2H-150 | 10 | 740 |
Series B Performance Table
| Model | Ultimate Pressure (Pa) | Pumping Speed (L/s) | Max Allowed Pressure Diff (hPa) | Inlet Diam (mm) | Outlet Diam (mm) | Motor Power (KW) | Recommended Backing Pump | Cooling Water (L/min) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| ZJ-600B | 3×10⁻² | 600 | 58 | 200 | 200 | 7.5 | 2H-70B 2H-150 | 8 | 499 |
| ZJ-1200B | 3×10⁻² | 1200 | 53 | 250 | 200 | 11 | 2H-150 | 10 | 650 |
| ZJP-600B | 3×10⁻² | 600 | 32 | 200 | 200 | 7.5 | 2H-70B 2H-150 | 8 | 573 |
| ZJP-1200B | 3×10⁻² | 1200 | 44 | 250 | 200 | 11 | 2H-150 | 10 | 740 |
Roots Vacuum Pump Applications
The Ever-Power Water-Cooled Roots Pumps are engineered for demanding industries. Their zero-leakage capability makes them the best Roots vacuum pumps for coating systems and other sensitive applications.
Semiconductor Industry
As a specialized Roots vacuum pump for semiconductor industry, it handles process gases without the risk of oil back-streaming or seal leakage, ensuring high wafer yield.
Vacuum Coating (PVD/CVD)
The high pumping speed and clean operation are critical for depositing thin films on glass, optics, and solar panels.
Chemical & Pharmaceutical
The sealed motor design makes it safe for handling volatile or toxic solvents in vacuum drying and distillation processes.
New Material Production
Ideal for vacuum melting, sintering, and heat treatment where high-temperature adaptability is required.
Installation Dimensions
Correct installation is key to performance. Use the following Roots vacuum pump installation guide data to plan your system layout.
ZJ-600B & ZJ-1200B External Dimensions (mm)
| Model | L0 | L1 | L2 | L3 | L4 | H1 | H2 | H3 | W1 | W2 | W3 | D1 | D2 | n1-MA | Cooling In/Out |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ZJ-600B | 1204 | 399 | 292.5 | 585 | 25 | 540 | 50 | 175 | 460 | 560 | 560 | 285 | 260 | 12-M10 | G1/2" |
| ZJ-1200B | 1500 | 509 | 315 | 630 | 25 | 570 | 50 | 200 | 500 | 600 | 560 | 335 | 310 | 12-M10 |
ZJP-600B & ZJP-1200B External Dimensions (mm)
| Model | L0 | L1 | L2 | L3 | L4 | H1 | H2 | H3 | W1 | W2 | W3 | D1 | D2 | n1-MA | Cooling In/Out |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ZJP-600B | 1024 | 399 | 277.5 | 760 | 27.5 | 673 | 70 | 235 | 480 | 590 | 375 | 285 | 250 | 8-M10 | G1/2" |
| ZJP-1200B | 1500 | 509 | 316 | 948 | 26 | 675 | 65 | 250 | 520 | 650 | 425 | 335 | 310 | 12-M10 |
Roots Vacuum Pump Maintenance Tips & Reliability
Although the canned motor design reduces maintenance by removing the dynamic seal, regular care is still essential for an industrial Roots vacuum pump.
- Cooling Water Check: Ensure the cooling water flow rate (8-10 L/min) is maintained. Blockages in the water jacket can lead to overheating.
- Gearbox Oil: Periodically check and change the gear oil to ensure smooth rotor synchronization. This is a vital part of any Roots vacuum pump troubleshooting guide.
- Backing Pump: Always ensure your Roots vacuum pump backing pump (e.g., slide valve or rotary vane pump) is functioning correctly, as the Roots pump cannot discharge directly to the atmosphere.
Need replacements? We are a full-service Roots vacuum pump manufacturer offering genuine Roots vacuum pump spare parts to keep your system running efficiently.
Frequently Asked Questions (FAQ)
1. What is the main difference between the ZJ and ZJP series?
The ZJP series features an internal bypass relief valve (overflow valve). This allows the pump to start at higher pressures and automatically protects the motor from overload if the pressure differential becomes too high. The ZJ series is a standard booster without this valve.
2. Why is water cooling better than air cooling for this pump?
Water cooling provides more consistent and efficient heat dissipation, especially for the canned motor design where the motor is enclosed. This allows the pump to operate in high-temperature environments or enclosed spaces where air cooling would be insufficient.
3. Can this pump be used alone?
No, this is a Roots booster vacuum pump. It must be connected to a backing pump (such as a rotary vane, screw, or liquid ring pump) to exhaust gas to the atmosphere.
4. Is this pump suitable for corrosive gases?
The standard version is made of cast iron. For corrosive applications in the semiconductor or chemical industries, we can provide special anti-corrosion coatings or materials upon request.
5. What are the installation requirements for the water cooling system?
You need a clean water source with a flow rate of 8-10 L/min depending on the model. The inlet water temperature should ideally be below 25°C to maximize cooling efficiency.
Additional information
| edited | by hyw |
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Product Quick Detail:
- Standard and non-standard available
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- Packing as per customer’s demand.
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Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.
Materials Available
1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
4. Bronze: C51000, C52100, C54400, etc
5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
7.OEM according to your request
Surface Treatment
Annealing, natural canonization, heat treatment, polishing, nickel plating, chrome plating, zinc plating,yellow passivization, gold passivization, satin, Black surface painted etc.
Processing Method
CNC machining, punch,turning, milling, drilling, grinding, broaching, welding and assembly
QC & Certificate
Technicians self-check in production,final-check before package by professional Quality inspector
ISO9001:2008 , ISO14001:2001,ISO/TS 16949:2009
Package & Lead Time
Size: Drawings
Wooden Case/Container and pallet, or as per customized specifications.
15-25days samples. 30-45days offcial order
Port: Shanghai/Ningbo port
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