High-Speed Roots Vacuum Pump Operation - China Suppliers & Factory for Efficient Performance
01
The entire series is equipped with QT500 high-strength ductile iron rotor, with a tensile strength of 500 MPa and an elongation rate of 15%.
02
The accessories are precisely manufactured by imported processing centers, with strict control of the gaps between rotors and between rotors and the pump body, ensuring stable operation when the gap is less than 0.05mm.
03
The spiral jacket cooling method ensures excellent heat exchange efficiency, fully guaranteeing the low-temperature lubrication performance of the lubricating oil, thereby extending the service life of gears, bearings and mechanical seals.
04
The use of precision gears (5-level accuracy) for rotation and precision couplings for connection ensures the smoothness and accuracy of the pump's operation, with extremely low running noise.
Product Parameters
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ZJP / ZJ Series Roots Vacuum Pump — Model Specifications
| Model Number | Max. Suction Rate (L/S) | Intake Diameter (mm) | Exhaust Pipe Diameter (mm) | Noise ≤dB(A) | Motor Power (kW) | Speed (r/min) |
|---|---|---|---|---|---|---|
| ZJP-30 | 30 | 80 | 50 | 78 | 1.5 | 1420 |
| ZJP-70 | 70 | 80 | 50 | 78 | 1.5 | 2840 |
| ZJP-150 | 150 | 100 | 80 | 81 | 3 | 2880 |
| ZJP-300 | 300 | 150 | 100 | 82 | 4 | 2890 |
| ZJP-600 | 600 | 200 | 150 | 84 | 7.5 | 2900 |
| ZJ-1200 | 1200 | 250 | 200 | 85 | 11 | 2940 |
| ZJ-2500 | 2500 | 300 | 250 | 87 | 22 | 2940 |
| ZJ-5000 | 5000 | 400 | 400 | 88 | 37 | 2940 |
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Frequently Asked Questions
Q
What is the difference between the ZJP and ZJ series Roots vacuum pumps?
The ZJP series (e.g., ZJP-30 to ZJP-600) is designed for lower to mid-range pumping speeds, while the ZJ series (ZJ-1200, ZJ-2500, ZJ-5000) covers higher suction rates with larger intake and exhaust pipe diameters. Both series share a similar operating principle but differ in capacity and physical dimensions to suit different application scales.
Q
How do I select the right model based on my required pumping speed?
Choose a model whose maximum suction rate (L/S) meets or slightly exceeds your process requirement. For example, if your application requires approximately 250 L/S, the ZJP-300 with a maximum suction rate of 300 L/S would be the appropriate selection. Always allow a safety margin to ensure stable performance under varying conditions.
Q
What are the noise levels of these Roots vacuum pumps, and are they suitable for noise-sensitive environments?
Noise levels range from ≤78 dB(A) for smaller models (ZJP-30, ZJP-70) up to ≤88 dB(A) for the largest model (ZJ-5000). For noise-sensitive environments, it is recommended to use the lower-capacity models and to install appropriate acoustic enclosures or vibration-damping mounts to further reduce operational noise.
Q
What motor power is required for the ZJ-5000 model, and how should I plan my electrical supply?
The ZJ-5000 requires a motor power of 37 kW. You should ensure that your electrical infrastructure supports this load, including appropriate circuit breakers, cabling rated for the current draw, and a stable power supply. It is recommended to consult a qualified electrician to verify that your facility's electrical system can safely accommodate this requirement.
Q
Can these Roots vacuum pumps operate as standalone units?
Roots vacuum pumps (ZJP/ZJ series) are typically used as booster pumps in combination with a backing pump (such as a rotary vane or rotary piston pump). They cannot start from atmospheric pressure on their own and require the system pressure to be reduced to a suitable level by the backing pump before the Roots pump is activated. Always refer to the system design guidelines for proper installation.
Q
What routine maintenance is recommended for the ZJP / ZJ series pumps?
Regular maintenance should include checking and replacing gear oil and bearing lubrication at recommended intervals, inspecting seals and gaskets for wear or leakage, cleaning the pump housing and rotors to prevent buildup, verifying motor performance and electrical connections, and monitoring noise and vibration levels as indicators of mechanical condition. Following the manufacturer's maintenance schedule will extend the service life of the pump.