Blowers

Blower System Design Tips

In order to utilize your regenerative blower most efficiently, proper system design is essential. The most important thing to recognize is that by utilizing large diameter plumbing, friction losses in plumbing can be greatly reduced. Here are some guidelines to use when setting up your blower system:

  • The plumbing should at least be the same size as the blower port or ideally one size larger (example - blower has ports that are 1-1/2” NPT, plumbing should be 2” NPT). The plumbing should remain this size until it has reached the location of the work area.
  • Plumbing for Separate Drive Blowers operating above 3500 RPM should be at least one pipe size larger than the blower ports.
  • Elbows create additional friction which causes pressure loss and back pressure. Plumbing at least one pipe sizelarger than the blower pipe ports minimizes the friction loss they create.
  • The pressure/vacuum relief valve should be installed in a “T” which is at least one pipe size larger than that of the exhaust of the blower. To properly protect a large horsepower blower, set the relief value to limit the blowers duty to 5 in. H2O below its continuous duty rating.
  • Operating the blowers at high altitude decreases their maximum pressure or vacuum duty rating. If this is a consideration, review the information on Fan Laws in the Application Engineering section of this catalog.
  • The exhaust air temperature of the blowers increases with increasing duty. At duties over 70 in. H2O it is too hot for most plastic pipe. Metal pipe must be considered. To prevent danger of burns, access to these pipes should be limited, guarded or marked “Danger Hot.”

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