Vacuum Solutions for All Heat Treatment Processes

Busch vacuum technology in heat treatment processes has a fundamental advantage: the materials undergoing treatment are prevented from reacting with atmospheric gases, which leads to enormous improvements in product quality and surface finish. Vacuum levels can be set precisely within the treatment cycle, helping to keep processes controlled and results reproducible.
The guaranteed high vacuum levels allow many processes to run
at lower temperatures, an additional (and possibly substantial)
energy saving.
 

• Nitriding / Nitrocarburising
• Annealing
• Hardening
• Tempering
• Vacuum Soldering

With its extensive network of over 60 Busch companies in more than 40 countries and agencies worldwide, Busch is present  at every location in the world where steel and other materials are vacuum heat treated. Both manufacturers and users of heat treatment equipment can benefit from our know-how and long experience as vacuum specialists.

Busch offers a huge range of vacuum units suitable for low to high vacuum ranges. Systems are designed to provide the optimal solution for any process or heat treatment combination. We supply large and small - from complete units with control systems to the replacement of existing plant components.

Both dry-running (fluid free) and classical (oil-lubricated rotary vane) vacuum systems can be supplied, tailored to suit process requirements and customer preferences.

Furnace manufacturers and plant designers throughout the world rely on Busch vacuum technology, and appreciate the competent advice and support given to the development of new plant and processes. The owners of heat treatment plant benefit from system reliability and the extensive Busch service network, which is supported by offices throughout the world.

Whatever your vacuum needs, Busch will offer you the system best suited to your technical and economic requirements. We can also recommend an attractive maintenance plan from our wide range of service options.

Vacuum heat treatment is the most economical, reliable and reproducible way of imparting characteristics to materials and surfaces. Compared to inert gas ovens it is cleaner - a vacuum contains far fewer contaminants than the best quality gas. Vacuum supply is thus both an important part of heat treatment processes and an indicator of high product quality. Here is a selection from the extensive Busch product range:

Combi vacuum systems
Combi vacuum systems can be built with several types of pump, and always include a backing pump combined with a booster. The number of combinations of pump types and sizes is very large, permitting the operating pressure and throughput to be matched exactly to the heat treatment process.

COBRA dry screw vacuum pumps
COBRA backing pumps used in Combi vacuum systems allow your fine and high vacuum supplies to operate entirely without fluids. COBRA screw vacuum pumps compress in a single stage, operate contact-free and are dry-running. Used with Puma or Panda vacuum-boosters, they make the ideal combination for even the most demanding of heat treatment processes.

R 5 rotary vane vacuum pumps
R 5 rotary vane vacuum pumps have a robust and proven oil-lubricated design and may be used as fore pumps. They are air-cooled, and available in a wide range of sizes. They may be combined with Puma or Panda Vacuum-Boosters and are ideal for all fine vacuum applications.

Rangu diffusion vacuum pumps
Rangu diffusion pumps deliver top performance for high vacuum applications. They have an innovative multi-stage jet design, and are ideal for large-scale heat treatment processes in which high vacuum levels must be achieved in the shortest possible time. Rangu diffusion pumps are best used in a Combi system that generates the required rough vacuum.

Turbo turbomolecular vacuum pumps
Turbo vacuum pumps were developed specifically for industrial high vacuum applications at up to 1·10^-10 hPa (mbar). They are used when high pumping speeds are required, and in cases where the  evacuated gases must remain completely free of operating fluids.