ZJP 300A Roots Vacuum Pump High-Efficiency Oil-Free Vacuum Solution

The ZJP 300A Roots vacuum pump features an oil-free design with a pumping speed of 300 L/S, making it ideal for industrial processes like vacuum coating, heat treatment, and distillation. Compact in structure and low in noise, it includes a bypass valve for safe operation.

Technical Specifications

Working Principle of ZJP 300A Roots Vacuum Pump

1. Basic Operation Mechanism

The ZJP 300A Roots vacuum pump uses two figure-8-shaped rotors that rotate in opposite directions via synchronized gears. The rotors maintain a minimal clearance with the pump chamber, enabling high-speed, frictionless operation.

Position I & II: The volume on the intake side increases, drawing in gas.

Position III: A portion of the gas is isolated.

Position IV: The gas is discharged through the outlet, completing the pumping cycle.

2. Pressure Difference Control Mechanism

If the pressure difference between the inlet and outlet becomes too high, the bypass valve automatically opens, allowing some gas to recirculate to the inlet, reducing load and protecting the pump.

Ensures safe operation when paired with a backing pump (e.g., rotary vane or liquid ring pump).

3. Collaborative Operation Mode

Must be used with a backing pump (e.g., rotary vane or liquid ring pump).

For higher vacuum requirements, two Roots pumps can be connected in series to form a three-stage pumping system.

Features of ZJP 300A Roots Vacuum Pump

✅ Oil-Free & Contamination-Free: No lubricating oil, eliminating oil vapor pollution—ideal for clean environments.
✅ Compact Design: Small footprint, supports horizontal or vertical installation.
✅ Low Noise Operation: Optimized dynamic balance, noise level at only 80 dB(A).
✅ Handles Special Gases: Can process condensable gases (e.g., water vapor).
✅ Fast Start-Up: Reaches ultimate vacuum quickly.
✅ Energy Efficient: 4 KW motor ensures low operating costs.
✅ Safe & Reliable: Bypass valve provides overload protection, extending service life.

Applications of ZJP 300A Roots Vacuum Pump

Vacuum Coating: Optical coatings, PVD/CVD deposition.

Vacuum Heat Treatment: Metal annealing, quenching.

Food Industry: Freeze-drying, dehydration.

Chemical & Pharmaceutical: Distillation, concentration, impregnation.

Electronics Industry: Semiconductor manufacturing, LCD panel production.

Environmental Protection: Vacuum dust removal, waste gas recovery.

ZJP 300A Roots Vacuum Pump FAQs

Q1: Can the ZJP 300A operate alone?

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

Q2: What is the maximum allowable pressure difference?

✅ 4300 Pa; the bypass valve activates if exceeded.

Q3: Does it require lubrication?

❌ Oil-free design, no lubrication needed, preventing contamination.

Q4: Is it suitable for corrosive gases?

⚠️ Requires optional anti-corrosion coating or special rotor materials.

Q5: What is the noise level?

�� 80 dB(A), compliant with industrial standards.

Q6: Does it need preheating before startup?

⏱️ No preheating required; starts quickly.

Q7: Does vertical installation affect performance?

�� No impact; supports multiple installation orientations.

Q8: What is the maintenance interval?

��️ Inspect gears and seals every 2000 operating hours.

Q9: Will pumping speed degrade over time?

�� Regular maintenance ensures stable performance.

Q10: How to choose a backing pump?

�� Select based on system requirements, such as rotary vane (2X series) or liquid ring pumps.

Conclusion

The ZJP 300A Roots vacuum pump, with its high pumping speed, oil-free operation, and low maintenance costs, is an ideal choice for industrial vacuum systems. It is widely used in food processing, chemicals, electronics, and more, providing reliable and efficient vacuum solutions. For technical support, contact our engineering team!