ZJP 30A Roots Vacuum Pump: High-Efficiency Oil-Free Vacuum Solution

The ZJP 30A Roots Vacuum Pump adopts an oil-free design with a pumping speed of 30 L/S, ideal for high-volume vacuum systems. Equipped with a bypass valve for protection, low noise (76 dB), and energy efficiency, it is widely used in food, chemical, pharmaceutical, and other industries.

Working Principle of ZJP 30A Roots Vacuum Pump

1. Basic Operation Mechanism

The ZJP 30A Roots Vacuum Pump utilizes two figure-8-shaped rotors that rotate in opposite directions via synchronized gears, maintaining a minimal gap between the rotors and the pump chamber for high-speed, frictionless operation.

Suction Phase (Position I, II): The inlet volume expands, drawing gas in.

Sealing Phase (Position III): A portion of gas is isolated.

Exhaust Phase (Position IV): Gas is pushed toward the outlet for discharge.
Each full rotation completes two pumping cycles, ensuring high efficiency.

2. Pressure Differential Control

The ZJP 30A is equipped with a bypass valve that automatically opens when the pressure difference exceeds 5300 Pa, allowing partial gas recirculation to reduce load on the backing pump and prevent overload.

3. Collaborative Operation Mode

A Roots pump must be paired with a backing pump (e.g., rotary vane pump, water ring pump) to achieve higher vacuum levels. For enhanced performance, two Roots pumps can be connected in series for a three-stage vacuum system.

Key Advantages of ZJP 30A Roots Vacuum Pump

✅ Oil-Free & Contamination-Free: No lubrication required, eliminating oil vapor pollution.
✅ Compact Design: Small footprint, supports horizontal/vertical installation.
✅ Low Noise Operation: Optimized dynamic balance design, noise level at only 76 dB.
✅ Energy Efficient: 1.5 KW motor reduces operational costs.
✅ Fast Start-Up: Reaches ultimate vacuum quickly, improving productivity.
✅ Safe & Reliable: Bypass valve provides automatic overload protection.

Applications of ZJP 30A Roots Vacuum Pump

Food Industry: Freeze drying, vacuum packaging, concentration.

Chemical Industry: Vacuum distillation, reaction processes, solvent recovery.

Pharmaceuticals: Drug drying, sterile packaging, lyophilization.

Electronics: Vacuum coating, semiconductor manufacturing.

Environmental: Vacuum dust removal, exhaust gas treatment.

ZJP 30A Roots Vacuum Pump FAQ

Q1: Can the ZJP 30A operate alone?

 No, it must be paired with a backing pump (e.g., rotary vane pump).

Q2: Does this pump require lubrication?

 No, it is oil-free for clean operation.

Q3: What is the maximum allowable pressure difference?

 5300 Pa; the bypass valve activates beyond this limit.

Q4: How noisy is it?

 76 dB(A), compliant with industrial noise standards.

Q5: Is it suitable for corrosive gases?

 Standard models are not; anti-corrosion versions are available.

Q6: What checks are needed before startup?

 Inspect power supply, cooling system, and backing pump for blockages.

Q7: What is the maintenance interval?

 Check gear oil and seals every 2000 operating hours.

Q8: Does vertical installation affect performance?

 No, but ensure the exhaust port faces upward to prevent liquid accumulation.

Q9: Does pumping speed vary with vacuum level?

 Yes, speed slightly decreases at higher vacuums; optimize with a backing pump.

Q10: How to reduce operational noise?

 Use vibration dampers, silencers, and secure piping connections.

Conclusion

The ZJP 30A Roots Vacuum Pump, with its high pumping speed, oil-free design, and low energy consumption, is an ideal choice for food, chemical, pharmaceutical, and other industries. For customized solutions or technical support, contact us today!