280m3/h,BSJ70L Roots Booster Vacuum Pump 0.75kW ,AL alloy

BSJ70L 165cfm (280m³/h) 50Hz 0.75kW 2Poles Mechanical Booster Pump,Roots Pump


Description

The roots vacuum pump, also known as a roots blower, is a positive-displacement pump that operates by using two synchronized lobed rotors (shaped like "roots") to transfer gases and create vacuum conditions. Its core function is to efficiently increase the pumping speed in the medium to high vacuum range, often used in conjunction with a backing pump (such as a rotary vane pump) to form a compound vacuum system. Below are its specific functions and application characteristics:


Characteristics:

• The use of an oil-free intermediate seal,and multiple-sealed ways ensures a high clean vacuum environment in the rotor chamber.
• Advanced processing ensures a good geometrical symmetry of the rotors, as well as low noise and long service life.
• A special shaft seal is used to achieve long, stable running without oil leakage.
• The BSJ-L series is made of all-aluminum alloy, a heat sink, corrosion-resistant, and efficient, energy-saving.
• The BSJ-LC series is made of cast iron. The unique liquid coupling method enables the pump to start directly under the atmosphere, which greatly reduces the time of pumping.
• Compact structure, light weight, and small volume.

​Technical Parameter :

Note: The value of 'Ultimate Pressure' in this sheet is measured by a Pirani gauge when the Baosi special pump oil is used,and the value should be 4x10^-3 if the McLeod gauge is used.

Performance Curve:




Dimensions:






Applications

• Semiconductor Fabrication
• LED & Display Manufacturing
• Vacuum Heat Treatment
• Physical Vapor Deposition (PVD)
• Vacuum Distillation & Drying
• Food Preservation & Processing
• Vacuum Packaging
• Scientific Research

Key Roles in Compound Vacuum Systems

• As a Booster Pump
  When paired with a backing pump (e.g., a rotary vane pump or a screw pump), the roots pump acts as a "booster" to bridge the gap between the backing pump's capacity and the system's required vacuum performance. For example:
  • The backing pump handles the low vacuum range (high pressure), while the roots pump takes over in the medium to high vacuum range, reducing overall evacuation time.
  • This combination enables systems to reach higher vacuum degrees (e.g., 10⁻³ Pa) more efficiently than single pumps.
• Energy Savings & Efficiency Enhancement
  By sharing the pumping load, roots pumps reduce the workload on backing pumps, extending their lifespan and lowering energy consumption. For instance, in large vacuum chambers, a roots pump can quickly remove most gases, while the backing pump focuses on achieving the ultimate vacuum.

Company Profile
Suzhou Kaco Vacuum Equipment Co., Ltd. is a leading high-tech enterprise specializing in delivering comprehensive vacuum demand solutions and advanced vacuum application processes. Integrating production, sales, technical R&D, and application services, the company is committed to providing innovative and reliable vacuum system solutions for diverse industrial sectors. Its core product portfolio includes single-stage oil rotary vane pumps, double-stage oil rotary vane pumps, roots vacuum pumps, screw dry pumps, scroll dry pumps, vacuum valves, and oil-based accessories. Backed by a team of professional engineers, the company offers end-to-end vacuum technical services, covering equipment supply, customized vacuum process design, central vacuum system integration, complete unit configuration, and after-sales maintenance. Upholding the principle of "Technology and Service in Parallel", it strives to deliver professional, reliable, and tailored vacuum solutions to clients worldwide.

Core Services & Products

1. Vacuum Equipment Maintenance & Support

• Comprehensive maintenance and repair services for vacuum equipment to ensure optimal operational performance, including long-term maintenance contracts.

2. Bowser Vacuum Equipment Solutions

• Sales, maintenance, and repair of Bowser-branded vacuum equipment, accompanied by a full range of accessories, consumables (e.g., vacuum pump oil, oil seals), and technical support.

3. Imported Vacuum Pump Services

• One-stop services for imported vacuum pumps, covering sales, maintenance, and repair of renowned brands such as ALCATEL, BUSCH, Becker, Rietschle, Pfeiffer, Leybold, Edwards, ULVAC, and Japan Orion. Also provides genuine accessories for various vacuum pump brands.

4. Imported Vacuum Pump Accessories & Lubricants

• Distribution of high-quality imported vacuum pump accessories and lubricants, including:
  • Leybold Vacuum Pump Oil, Edwards Vacuum Pump Oil, ULVAC Vacuum Pump Oil, Rietschle Vacuum Pump Oil, Becker Vacuum Pump Oil.

5. Vacuum Pump Spare Parts

• A wide range of spare parts is available:
  • Oil mist separators (exhaust filters), rotor vanes, carbon vanes, oil seals (shaft seals), sealing kits, shaft sleeves, bearings, coupling pads/sleeves, couplings, exhaust valves/plates, sight glasses, air assemblies, air filters, oil filters, fan blades, fan covers, check valves, gas ballast valves, radiators, shock-absorbing mounts, vacuum pump sealing kits, and repair kits.