Roto Prime Series

//Roto Prime Series
Roto Prime Series 2018-02-19T18:37:52+00:00
fuel pumps australia

Roto Prime Series

The Gorman-Rupp Roto-Prime range of self priming centrifugal pumps is specifically designed for pumping petroleum products, petrochemicals and solvents. The Roto-Prime fuel pump incorporates a variable capacity vane [priming] pump which quickly and automatically evacuates air and vapour from suction lines, making them ideal for loading, off-loading transports and stripping hoses. Advantages include:

  • Ability to mount high and dry above the liquid source
  • Eliminates vapour lock or air lock in suction lines
  • Easy access for monitoring or service

Roto Prime Series Fuel Pump – Performance

  • Flows: 5 l/s – 75 l/s
  • Heads: 5m – 80m
  • Solids: None
  • Size: 2″, 3″, 4″+ 5″
  • Priming: In-built priming system. Re-primer. Remove vapour
  • Application: Fuel only

Roto Prime Series Fuel Pump – Special Features

Automatically Removes Air and Vapour
Whenever air or vapour is present at the start of the pumping operation – or when there is a loss of suction because of air or vapour during pumping – the priming pump automatically moves air and vapour from the suction line to the discharge line. Once the flowing liquid from the centrifugal portion of the fuel pump builds up sufficient pressure in the discharge system, the priming pump stops.
Here is a more in-depth look at how the priming system works:
submersible pump

Full Priming Position.  When air or vapour is in the suction line, the spring is able to hold the priming pump in full air pumping position.

fuel pumps australia

Partial Priming.  As the pump evacuates air and vapour from the lines, liquid pressure builds up on the underside of the sliding priming pump housing, moving it toward neutral.

fuel pump

Neutral.  When air and vapour are removed, liquid pressure equalises spring pressure and the priming pump automatically slides into neutral…..where it remains until air and vapour appear again in the system.

Roto-Prime pumps are actually two pumps in one. The small powerful vane-type pump within the main centrifugal housing can prime an absolutely dry 100mm line with zero back pressure in approximately 6 seconds per metre without initial manual priming.

Roto Prime Series Fuel Pump – Video

Self Priming

The Gorman-Rupp Roto Prime series will automatically remove air and vapour from suction lines.
Whenever air or vapour is present at the start of the pumping operation – or when there is a loss of suction because of air or vapour during pumping – the priming pump automatically moves air and vapour from the suction line to the discharge line. Once the flowing liquid from the centrifugal portion of the pump builds up sufficient pressure in the discharge system, the priming pump stops.

Here is a more in-depth look at how the priming system works:

self priming roto 1

Full Priming Position. When air or vapour is in the suction line, the spring is able to hold the priming pump in full air pumping position.

self priming roto 2

Partial Priming. As the pump evacuates air and vapour from the lines, liquid pressure builds up on the underside of the sliding priming pump housing, moving it toward neutral.

self priming roto 3

Neutral. When air and vapour are removed, liquid pressure equalises spring pressure and the priming pump automatically slides into neutral…..where it remains until air and vapour appear again in the system.

Roto-Prime pumps are actually two pumps in one. The small powerful vane-type pump within the main centrifugal housing can prime an absolutely dry 100mm line with zero back pressure in approximately 6 seconds per metre without initial manual priming.

Roto-Prime pumps are actually two pumps in one. The small powerful vane-type pump within the main centrifugal housing can prime an absolutely dry 4 inch (102mm) line with zero back pressure in approximately two seconds per foot without initial manual priming. And, this priming pump will evacuate suction lines against back pressure up to 8 pounds per square inch.

High and Dry

Gorman-Rupp self priming centrifugal pumps can be mounted “high and dry” above the sump liquid level. No need for (submersible) pumps to be in the liquid being pumped (wearing and corroding from the inside and the outside). This means there are no guide rails to maintain, no [leaking?] discharge bend to maintain/replace, and no need to open wet well lids and expose operators to falls.

Self priming pumps also virtually eliminate confined spaces issues and eliminate the need for lifting devices such as cranes or hoists, because pumps are at the surface [ground level], so are easy to access for monitoring and maintenance.

Easy Access

Because Gorman-Rupp self priming pumps are located at ground level, high and dry above the liquid level, they are easy to access for monitoring, service and repair.

Whereas submersible pumps can only be accessed by opening wet well lids (exposing operators to “working at heights” and “working over water”) and winching or craning pumps to the surface (exposing operators to “working with swinging weights”), operators can access Gorman-Rupp self primers at ground level.

End suction pumps will often need a “dry well” which is accessed by going down stairs or a ladder. They need isolation valves on the suction. This makes them more difficult to access than Gorman-Rupp self primers.