High‑Speed Industrial Roots Vacuum Pumps
Maximize your system’s pumping speed with Ever-Power ZJ/ZJC Series Roots Vacuum Pumps. Engineered for high-vacuum stability in coating, semiconductor, and metallurgical industries. Featuring CNC-machined precision, oil-free chambers, and robust booster capabilities. Get a quote for your Roots pump vacuum system today.
The Ultimate Roots Booster Vacuum Pump for High-Capacity Industrial Applications. Precision Engineered for Stability, Low Noise, and Long Service Life.
ZJ/ZJC Series Performance Specifications
Review the technical data below to select the appropriate model for your vacuum system.
| Model | Ultimate Pressure (Pa) | Pumping Speed (L/s) | Max Allowable Pressure Diff (hPa) | Inlet Diam (mm) | Outlet Diam (mm) | Motor Power (kW) | Rec. Backing Pump | Cooling Water (L/min) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|
| ZJ-70 / ZJC-70 | 3×10⁻² | 70 | 100 | 80 | 50 | 1.1 | 2XZ-18 / 2H15 | 4 | 75 / 80 |
| ZJ-150 / ZJC-150 | 3×10⁻² | 150 | 80 | 100 | 100 | 2.2 | 2H30B | 5 | 175 / 180 |
| ZJ-300 / ZJC-300 | 3×10⁻² | 300 | 60 | 150 | 150 | 4 | 2H70B | 6 | 230 / 245 |
| ZJ-600 / ZJC-600 | 3×10⁻² | 600 | 58 | 200 | 200 | 7.5 | 2H70B / 2H150 | 8 | 560 / 575 |
| ZJ-1200 / ZJC-1200 | 3×10⁻² | 1200 | 53 | 250 | 200 | 11 | LGB180 / 2H150 | 10 | 750 / 800 |
| ZJ-1800 / ZJC-1800 | 3×10⁻² | 1800 | 44 | 250 | 250 | 15 | 2H150 + 2H150 | 12 | 1100 |
| ZJ-2500 | 3×10⁻² | 2500 | 44 | 320 | 320 | 18.5 | ZJ600 / 2HGL150 | 12 | 1350 |
| ZJ-3750 | 3×10⁻² | 3750 | 30 | 400 | 320 | 37 | ZJ1200 / ZJ300 | 12 | 2710 |
| ZJ-5000 | 3×10⁻² | 5000 | 30 | 400 | 320 | 45 | ZJ2500 / ZJ600 | 12 | 3100 |
*Note: "C" denotes Magnetic Drive Roots Pump.
Product Overview: The Heart of High Vacuum
In the realm of advanced manufacturing, the need for rapid evacuation and stable high-vacuum environments is critical. Ever-Power presents the ZJ and ZJC Series, a premium line of Industrial Roots Vacuum Pumps designed to act as high-performance mechanical boosters. Unlike standalone pumps, these units are engineered to significantly increase the pumping speed of a system when paired with a backing pump, extending the vacuum range into the high-vacuum region.
Our Roots pumps are manufactured using advanced CNC machining centers, ensuring rigorous tolerances and interchangeability of parts. The pump body, side covers, and end covers are sealed with high-quality "O" rings, while cylindrical pins ensure precise positioning. This meticulous construction facilitates easy maintenance and ensures that our Roots vacuum pump for semiconductor industry applications meets the strictest standards for cleanliness and reliability.
Whether you are designing a new Roots pump vacuum system for vacuum coating or upgrading an existing metallurgical furnace, the Ever-Power ZJ series offers the durability required for continuous industrial operation.
Roots Vacuum Pump Working Principle
Understanding the Roots vacuum pump working principle is key to maximizing its efficiency. The ZJ series utilizes a pair of "8"-shaped rotors (skins) that rotate synchronously in opposite directions within the pump casing at constant speed. This rotation creates suction and exhaust actions.
- Contact-Free Rotation: The two rotors are supported by rolling bearings and synchronized by a pair of high-precision gears. Crucially, the relative position of the two rotors remains constant, maintaining a minute gap between rotor-to-rotor and rotor-to-casing. Because there is no friction in the working chamber, no lubrication is required, creating a clean vacuum environment.
- Dynamic Balance & Sealing: The rotating components undergo meticulous dynamic balancing. We utilize precision helical gears to ensure smooth operation and low noise. The dynamic seal area features a reliable design with imported oil seals, strictly controlling the shaft seal runout to ≤0.02mm to prevent oil leakage.
Note: A Roots pump cannot exhaust directly to the atmosphere. It must be used in conjunction with a fore-pump (backing pump).
Key Features & Advantages
High-Speed Performance
Designed as High‑speed Roots vacuum pumps, capable of handling large volumes of gas at low pressures. The optimized rotor profile maximizes volumetric efficiency.
Robust Sealing Technology
Eliminate leaks with our advanced shaft seal design. Controlling runout to ≤0.02mm ensures that our Roots booster vacuum pump remains oil-tight and reliable over long operational periods.
Versatile Configuration
The pump body features a flexible structure with one exhaust port and three potential positions, facilitating easy installation and connection in complex Roots vacuum pump applications.
System Compatibility
Can be paired with screw pumps, oil seal pumps, or liquid ring pumps. When used with screw or liquid ring pumps, it excels at pumping large amounts of condensable gases.
Installation Dimensions
ZJ/ZJC Series Dimensions (70 - 1200) - Part 1
| Model | L0 | L1 | L2 | L3 | L4 | H1 | H2 | H3 | W1 | W2 | W3 | 4-ΦV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ZJ-70 / ZJC-70 | 773 | 221 | 155 | 310 | 15 | 250 | 30 | / | 220 | 265 | / | 4-φ14 |
| ZJ-150 / ZJC-150 | 922 | 267 | 170 | 340 | 20 | 320 | 30 | / | 297 | 357 | / | 4-φ18 |
| ZJ-300 / ZJC-300 | 1100 | 327 | 230 | 460 | 20 | 360 | 30 | 120 | 300 | 360 | 370 | 4-φ18 |
| ZJ-600 / ZJC-600 | 1370 | 399 | 292.5 | 585 | 25 | 540 | 50 | 175 | 460 | 560 | 560 | 4-φ24 |
| ZJ-1200 / ZJC-1200 | 1730 | 509 | 315 | 630 | 25 | 570 | 50 | 200 | 500 | 600 | 560 | 4-φ24 |
ZJ/ZJC Series Dimensions (70 - 1200) - Part 2
| Model | D1 | D2 | D3 | d1 | d2 | d3 | d1' | d2' | d3' | n1-MA | n2-MB | n3-MC | Cooling Water Inlet | Cooling Water Outlet | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | 2 | 3 | |||||||||||||
| ZJ-70 / ZJC-70 | 145 | 125 | 80 | 110 | 90 | 50 | / | / | / | 4-M8 | 4-M8 | / | Φ12 | / | Φ12 | / |
| ZJ-150 / ZJC-150 | 170 | 145 | 100 | 170 | 145 | 100 | / | / | / | 4-M10 | 4-M10 | / | Φ12 | / | Φ12 | / |
| ZJ-300 / ZJC-300 | 225 | 195 | 150 | 225 | 195 | 150 | 170 | 145 | 100 | 8-M10 | 8-M10 | 4-M10 | Φ12 | / | Φ12 | / |
| ZJ-600 / ZJC-600 | 285 | 260 | 200 | 285 | 260 | 200 | 225 | 195 | 150 | 12-M10 | 12-M10 | 8-M10 | G1/2" | G1/2" | G1/2" | G1/2" |
| ZJ-1200 / ZJC-1200 | 335 | 310 | 250 | 285 | 260 | 200 | 285 | 260 | 200 | 12-M10 | 12-M10 | 12-M10 | G1/2" | G1/2" | G1/2" | G1/2" |
ZJ-1800 & ZJ-2500 Dimensions
| Model | L0 | L1 | L2 | L3 | L4 | H | D1 | D2 | D3 | D4 | D5 | D6 | n1-MA | Water Inlet | Water Outlet | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | 2 | 3 | ||||||||||||||
| ZJ1800 | 1840 | 520 | 490 | 660 | 750 | 70 | 335 | 310 | 250 | 285 | 260 | 200 | 12-M10 | G1/2" | G1/2" | G1/2" | G1/2" |
| ZJ2500 | 2000 | 605 | 660 | 830 | 920 | 40 | 425 | 395 | 320 | 335 | 310 | 250 | 12-M12 | G1/2" | G1/2" | G1/2" | G1/2" |
ZJ-3750 & ZJ-5000 Dimensions
| Model | L | L1 | L2 | L3 | L4 | H | H1 | H2 | H3 | H4 | W | W1 | W2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ZJ3750 | 630 | 806 | 671 | 215 | 106 | 960 | 40 | 50 | 525 | 290 | 1086 | 980 | 555 |
| ZJ5000 | 840 | 911 | 776 | 320 | 106 | 960 | 40 | 50 | 525 | 290 | 1086 | 980 | 555 |
| Model | D | D1 | D2 | d | d1 | d2 | 4-φK | n-K1 | n-K2 | φS |
|---|---|---|---|---|---|---|---|---|---|---|
| ZJ3750 | 400 | 480 | 510 | 320 | 395 | 425 | 4-φ33 | 16-M12 | 12-M12 | φ75h6 |
| ZJ5000 | 400 | 480 | 510 | 320 | 395 | 425 | 4-φ33 | 16-M12 | 12-M12 | φ75h6 |
Industry Applications
The Ever-Power Roots booster vacuum pump series is versatile, serving as a critical component in various high-tech sectors.
- Vacuum Coating
Essential for evaporation coating, magnetron sputtering, and ion plating lines where rapid evacuation and clean vacuum are mandatory. - Metallurgy
Used in special steel smelting, vacuum induction furnaces, vacuum desulfurization, and degassing processes. - Semiconductor & Electronics
Reliable performance for transformer drying, epoxy resin casting, and capacitor oil immersion. - Chemical & Drying
When paired with our screw pumps, it creates an ideal dry Roots vacuum pump system for distillation, freeze-drying, and solvent recovery.
Selection Guide: How to Choose Your Roots Pump
Choosing the right Roots vacuum pump backing pump combination is crucial for efficiency.
- Determine Required Vacuum: Roots pumps are boosters. For rough vacuum, a liquid ring backing pump is suitable. For high vacuum, a rotary vane or screw backing pump is preferred.
- Calculate Compression Ratio: Ensure the backing pump has sufficient capacity to handle the discharge of the Roots pump to prevent overheating.
- Gas Composition: For condensable gases, use a screw or liquid ring backing pump. For clean, dry air, an oil-sealed pump is cost-effective.
- Consider the Environment: Check if a magnetic drive Roots pump (ZJC series) is needed for zero-leakage requirements in hazardous environments.
What Our Clients Say
"We integrated the Ever-Power ZJ-1200 into our optical coating line. The vibration is virtually non-existent, and the pump down time improved by 20%. The Roots vacuum pump maintenance tips provided by their support team were very helpful."
- Process Engineer, Precision Optics Ltd.
"The Best Roots vacuum pumps for coating systems we have sourced. We use the ZJ-600 with a screw backing pump for our metallurgical furnace. The robust design handles the dust load surprisingly well."
- Plant Manager, Alloy Tech Solutions
Frequently Asked Questions (FAQ)
1. Can the Roots vacuum pump operate alone?
No, a Roots pump must work with a backing pump (fore-pump). Starting it directly at atmospheric pressure can cause overheating and motor overload due to high pressure differences. It typically starts once the backing pump has reduced the system pressure.
2. What type of backing pump should I use?
It depends on the application. For clean applications, use oil-sealed pumps. For applications with water vapor or solvents, dry Roots vacuum pump systems using Screw or Liquid Ring backing pumps are best.
3. How often does the gear oil need changing?
Check the oil level regularly. We generally recommend changing the gear oil every 1,500 to 2,000 operating hours, or more frequently if the operating environment is harsh. Refer to our Roots vacuum pump troubleshooting guide for oil specs.
4. What is the difference between ZJ and ZJC series?
The ZJ series uses standard high-quality shaft seals. The ZJC series utilizes a magnetic drive coupling, ensuring zero leakage, making it ideal for hazardous, toxic, or high-purity gas applications.
5. Do you provide spare parts?
Yes, we are a comprehensive Roots vacuum pump manufacturer and supply all necessary Roots vacuum pump spare parts, including O-rings, seals, bearings, and gears.
Boost Your Vacuum Performance Today
Contact Ever-Power for expert advice on configuring your Roots Vacuum System.
Additional information
| edited | by hyw |
|---|
Related products
-
Asynchronous Water-cooled Series Roots Vacuum Pump
-
Air-Cooled Roots Vacuum Pumps For Sale
-
High-Efficiency Integrated Vacuum Unit For Semiconductor Industry
-
Permanent Magnet Frequency Conversion Roots Vacuum Pumps
-
Industrial Roots Vacuum Pumps For Coating Systems
-
High-performance Roots Pump Systems With Rotary Piston Pumps
Product Quick Detail:
- Standard and non-standard available
- With high quality and competitive price
- Prompt delivery
- Packing as per customer’s demand.
We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.
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
English 
Bulgarian 
Russian 
Czech 
Bosnian 
Thai 
Arabic 
Chinese 
Swahili 
Amharic 
Japanese 
Korean 
Hungarian 
Spanish 
Azerbaijani 
Greek 
Vietnamese 
Danish 
Malay 
Hebrew 
Croatian 
Bengali 
Kyrgyz 
Italian 
Polish 
French 
Kazakh 
Portuguese