ZJP 600A Roots Vacuum Pump: High-Capacity Oil-Free Vacuum System Core Equipment

The ZJP 600A Roots Vacuum Pump utilizes dual-rotor oil-free technology with 600 L/S pumping capacity and 5.5 KW motor power, ideal for vacuum smelting, distillation, and concentration applications. Its compact structure and low noise level (82 dB(A)) support efficient production across multiple industries.

ZJP 600A Roots Vacuum Pump Technical Specifications

Working Principle of ZJP 600A Roots Vacuum Pump

Basic Operation Mechanism
The ZJP 600A employs two figure-8 shaped rotors that counter-rotate via precision gears while maintaining non-contact clearance with the pump chamber for high-speed, frictionless operation:

Position I & II: Inlet volume expands to intake gas

Position III: Partial gas becomes isolated

Position IV: Gas discharges through outlet, completing two cycles per revolution for doubled efficiency

Pressure Differential Control
When inlet/outlet pressure difference exceeds 4300 Pa, the bypass valve automatically opens to recirculate partial gas back to the inlet, reducing load on the backing pump and preventing overload.

Collaborative Operation Mode

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

For higher vacuum requirements, two Roots pumps can be connected in series

Product Features

✔ Oil-free & contamination-free: Dry operation without lubricant pollution, suitable for cleanrooms and food/pharmaceutical applications
✔ High-capacity efficiency: 600 L/S pumping speed for rapid gas evacuation and shorter process cycles
✔ Energy-saving design: 5.5 KW motor power reduces energy consumption by 15% compared to industry equivalents
✔ Compact and flexible: Supports horizontal/vertical installation for complex workshop layouts
✔ Ultra-low noise: Optimized dynamic balance design with only 82 dB(A) noise, meeting environmental standards
✔ Corrosion-resistant options: Special coatings available for condensable gases (e.g., steam, solvents)
✔ Intelligent protection: Bypass valve overload protection extends equipment lifespan

Application Fields

Vacuum metallurgy: Metal smelting, degassing

Chemical industry: Solvent recovery, vacuum distillation

Food processing: Freeze-drying, vacuum packaging

Pharmaceutical manufacturing: Drug concentration, sterile drying

Electronics industry: Semiconductor packaging, LCD panel coating

Environmental engineering: Waste gas recovery, dust treatment

Scientific research: Laboratory high vacuum simulation

Frequently Asked Questions

Q1: Can the ZJP 600A start directly connected to atmosphere?
No, the backing pump must be started first to reduce system pressure below 1000 Pa before operating the Roots pump.

Q2: What is the maximum allowable inlet gas temperature?
80°C, with cooling devices required for higher temperature gases.

Q3: Is regular rotor replacement needed?
Rotor lifespan exceeds 20,000 hours, with only clearance inspections required every 5,000 hours.

Q4: How to handle condensable gases?
Recommended to install gas ballast valves or condensers to prevent liquid accumulation in the pump chamber.

Q5: Does vertical installation affect pumping speed?
No effect, but the outlet must face upward to prevent lubricant backflow (backing pump must be compatible).

Q6: Possible causes for motor overheating?
Check for excessive pressure difference, backing pump mismatch, or cooling system failure.

Q7: How to troubleshoot sudden noise increase?
Inspect for rotor bearing wear, gear synchronization issues, or clogged inlet filters.

Q8: Can flammable/explosive gases be pumped?
Requires customized explosion-proof motor and anti-static design with inert gas protection.

Q9: Recommended backing pump models?
Compatible with 2X-30 rotary vane pumps or 2BE3 liquid ring pumps, selected based on process requirements.

Q10: What are the maintenance costs?
Oil-free design reduces consumable expenses, with annual maintenance costs 30% lower than traditional oil pumps.