Busch NC0400 B LZ1 Dry Screw Vacuum Pump

I. Five Industry Applications Overview

II. Photovoltaic & Monocrystal Silicon

2.1 Typical Duty

• Crystal pulling furnace vacuum and inert-gas systems: stable medium-speed continuous pumping
• Process characteristics: silicon particulates, 24/7 continuous operation
• NC0400 B LZ1 fit:
• 420 m³/h covers a single medium-frequency furnace station
• Dry screw structure tolerates particulates better than oil-sealed pumps
• 0.05 hPa ultimate vacuum meets pulling requirements

2.2 Selection Advice

• PV buyers of used dry pumps value: low unit cost + immediate availability
• At ¥68,500/unit with 3 units in stock, ideal for furnace expansion or batch replacement of aging pumps
• Suggested configuration: 2 running + 1 hot standby for redundancy

III. Chemical & Petrochemical

3.1 Typical Duty

• Solvent recovery and vacuum distillation: heavy condensable solvent vapor load
• Exhaust extraction and VOC transfer: potentially corrosive, fouling media
• NC0400 B LZ1 fit:
• Oil-free chamber — solvent vapor cannot emulsify pump oil
• Dry screw compression handles condensable gas loads
• Only 1.0 L of VE 101 in the gearbox — low running cost

3.2 Selection Advice

• For strongly corrosive media, confirm rotor coating configuration; Taixing can support refurbishment
• Front-end cold trap / dust removal recommended to extend overhaul intervals

IV. Pharmaceutical

4.1 Typical Duty

• Freeze dryer backing pumps, vacuum concentration, distillation recovery
• Media: water vapor, ethanol — cleanliness required
• NC0400 B LZ1 fit:
• Oil-free, prevents oil mist backstreaming into product
• 500 kg unit — flexible vacuum-station layout

4.2 Selection Advice

• GMP peripheral vacuum stations favor dry screw solutions
• Can serve as intermediate/backing stage with water-ring pumps to deepen system vacuum

V. Food & Packaging

5.1 Typical Duty

• Large vacuum packing lines, produce vacuum pre-cooling, impregnation
• Media: mostly water vapor, mostly intermittent
• NC0400 B LZ1 fit:
• Oil-free pumping — zero food-contact oil contamination risk
• Used pricing cuts packaging-line vacuum capex dramatically

5.2 Selection Advice

• Intermittent duty consumes equipment slowly — used pumps shine economically
• Manage gas ballast / condensate drainage properly

VI. Semiconductor Back-End & Laboratory

6.1 Typical Duty

• Rough vacuum steps outside cleanrooms, chamber pre-pumping, R&D platforms
• NC0400 B LZ1 fit:
• Backing pump for roots booster sets or standalone rough vacuum
• Lab duty of 4-8 h/day leaves ample equipment margin

6.2 Selection Advice

• For budget-limited R&D platforms, a used Busch delivers "top-brand performance at half the price"
• Backup requirement: 3 units in stock can cover main + standby in one purchase

VII. Universal Advantages of Used Pumps Across Industries

VIII. FAQ

Q1: Can this pump handle corrosive gases?

A: The COBRA NC series tolerates most chemical media well. For strongly corrosive duty, tell us the gas composition so we can confirm the coating configuration.

Q2: Can it pump water vapor?

A: Yes. Dry screw pumps handle condensable vapor well; manage gas ballast and drainage per your duty.

Q3: Is 420 m³/h enough for a crystal pulling furnace?

A: Yes — it matches a single medium-frequency furnace station; multiple furnaces can run pumps in parallel (3 in stock).

Q4: Any concern about used pumps for pharma?

A: The oil-free chamber is inherently clean, units are cleaned and tested before delivery, and GMP-peripheral vacuum stations use them widely.

Q5: Is a used pump worthwhile for a lab running a few hours daily?

A: Extremely worthwhile. Intermittent duty wears equipment slowly — ¥68,500 gets a top-brand 420 m³/h dry pump.

Q6: Can 3 pumps form a vacuum station?

A: Yes. 3 units in parallel form a ~1260 m³/h class dry vacuum station; Taixing provides piping design advice.

Q7: How do remote customers complete installation?

A: Units ship nationwide; installation is included in Fujian and engineers can be arranged elsewhere.