The opportunities for consultants to make troubleshooting a niche business can be very beneficial when the economy slows down and, in turn, design engineering for construction projects slows down.

We may receive a commission on purchases made from links. HVAC professionals need a good vacuum pump to evacuate air, moisture, and contaminants from refrigerant lines before recharging older systems ...

If you need to create a high vacuum, there are basically two options: turbomolecular pumps and diffusion pumps. Turbomolecular pumps require rotors spinning at many thousands of rotations per minute ...