Consider performance at your desired vacuum, some do better than other at different ranges and rebuild ouch factor, a Busch 50 hp rebuild is 40k, new is 50k. Do not rely on local distributors to be technically proficient on the other side of the zero, I have seen costly errors in engineering from them.
~Rich F, Technical Support, Hammonton, NJ
Go for comparatively lesser speed machines. Though they are big in size, they are more trouble free. Also go for ‘Over-Hung’ type rather than ‘Simply Supported’ type
~Sankar Narayan N, Engineering Consultant, Chennai, India
After sales service should have provided from installation to commissioning of the system. Clear application instruction must be provided in every user.
~Pete B., Design Engineer, Manila, Philippines
The most expensive manufacturers often don't offer any benefits over manufacturers at half the price. Won Chang offer really good value for money.
~Eric P., Marketing/Sales, Johannesburg, South Africa
Do not buy the cheapest vacuum pump or system. This equipment is sized and recommended based on actual process conditions.
~Robert C, Sr. Manager - Marketing and Services, Export, PA
Make sure the warranty is solid and the equipment has been factory tested to some standard such as HEI.
~Herb H, Technical Support, Leesburg, FL
Fine tune the application so that a system can be sized appropriately to minimize energy usage.
~Tom S., Engineer, Rockland, MA
Magnetic coupling between the rotor and motor increases reliability.
~Terry R, Marketing/Sales, Rochester, NY
An auto shutoff system is better.
~Harold P, Builder/Contractor, Cherryfield, ME
Dont by rotary vane pumps 10 hp
~Paul Van Ostrand, Builder/Contractor, Canoga Park, CA
No, I' haven't
~Arturo Loucel, General Management, San Salvador, El Salvador
GOMCO is ideal
~Maurice Peress, Professor, New York City, NY