back to top
My wish lists
Save your wish list
If you want to add more content to your wish list, simply log in. If you do not have a user account, please register for the Hanser Customer Center.

» Do you already have a user account? Please log in here.
» Don't have a user account yet? Please register here.
Your wish lists
If you want to use your wish list during your next visit, simply log in. If you do not have a user account, please register for the Hanser Customer Center.
» Do you already have a user account? Please log in here.
» Don't have a user account yet? Please register here.

« Back

Your advantages at a glance

  • One login for all Hanser portals
  • Individual home page for faster access to preferred content
  • Exclusive access to selected content
  • Personal wish lists on all portals
  • Central management of your personal information and newsletter subscriptions

Register now
Deutsch
Bookmark Bookmarked
05-06-2020

Three-Stage Pump Design with Regenerative Impellers

Conair HRG Series Vacuum Pumps

HRG Series vacuum pumps develop deep vacuum power for conveying plastic pellets over long distances, while keeping noise levels low (© Conair)

HRG Series vacuum pumps develop deep vacuum power for conveying plastic pellets over long distances, while keeping noise levels low
(© Conair)

The multi-stage regenerative impeller design of the new Conair HRG Series vacuum pumps is the key to developing deep vacuum power for conveying plastic pellets over long distances, while keeping noise levels comfortably low. An optional variable-frequency drive is available to save energy and enables the use of the new pump in Conair Wave Conveying systems.

“Until now, processors have had to accept various trade-offs when selecting a central vacuum pump,” explains Rich Shaffer, VP Product Development. “Single-stage regenerative pumps are quiet and inexpensive but limited to short- and middle-distance conveying applications. Positive displacement pumps have been the workhorses of conveying -- powerful and reliable but the low cost versions don’t handle long distances and are noisy. Long-distance pumps (LDP) are special positive displacement pumps that convey over long distances, at high rates, with low noise levels, but they can be quite expensive. Conair’s new hybrid regenerative pumps offer many of the best features of previous designs at a price that is about 30% lower than a comparable LDP unit.”

Distinctive Features

The secret is in the three-stage pump design, with regenerative impellers that smoothly cut, capture and compress the air with minimal draft or vibration. Like twin turbo chargers on automobile engines, the vacuum becomes deeper and more powerful at each stage allowing the HRG Series pumps to convey material up to 1000 linear feet. Vacuum levels below 12 inches of mercury are possible.

Hybrid regenerative technology makes the HRG pumps extremely quiet. Operating at 60 Hz, the average sound level ranges between 74 and 77 dBA, a comfortable range that does not require hearing protection.

Variable-Speed Option

Equipping the HRG pumps with a variable-speed drive (VFD) motor reportedly makes them ideal for use with Conair’s patented Wave Conveying System, which previously required a more costly LDP pump.

Instead of moving plastic materials at 5000 ft/min or more, creating dust, angel hair and equipment wear, Wave Conveying uses controlled speed conveying (300 to 2800 ft/min) to move material in compact slugs, waves or streams.

The VFD also saves energy by allowing the pump to operate using only the amount of power necessary to achieve the desired material speed and throughput. According to the company, an HRG pump, running in a Wave Conveying System, was shown to save as much as 50% on energy compared to similarly sized positive-displacement pump at equivalent throughput rates. Even in standard (non-Wave) operation, savings of up to 25% were observed. In addition to energy savings, the VFD option extends pump life by only running at the capacity necessary.

There are three different sizes: the HRG-10 pump has an 11.5-hp motor and is intended for 2.5-inch conveying lines; the HRG-15 (16.9 hp) and the HRG- 30 (42.9 hp) service up to 3-inch line sizes.
The new HRG pumps are also virtually maintenance free. The direct-drive system eliminates drive belts that wear and require constant adjustment. No lubrication is required.

Additional information
  • Powerful Demonstration
    Kunststoffe international 2018/04, PAGE 35 - 36

    Powerful Demonstration

    Coextrusion of Venous Catheters with Active Pharmaceutical Ingredients

    Coextrusion can be used to manufacture a catheter tube of thermoplastic polyurethane with active ingredients incorporated into the thin...   more

Company profile

Conair Corporate Office

200 West Kensinger Drive
US 16066 CRANBERRY TOWNSHIP, PA
Tel.: +1 724 584-5500

These articles might be interesting for you
Patents Stimulate Innovation

Patents encourage innovation: Stay on the ball with the latest innovations in the plastics industry in our patents section.

Patents

Newsletter

Would you like to subscribe to our Newsletters on plastics technology and profit from the latest information?

Subscribe here

Subscribe here

Trade Names

You know the trade name but want to know the material manufacturer, type of polymer and delivery form? Search here!

Trade Names