Gorman-Rupp - RD3A3 Series - Roto-Prime Double Volute Self-Priming Centrifugal Pump

The Roto-Prime self-priming centrifugal pump is specially designed for pumping petroleum products, related derivatives, petrochemicals and solvents. The Roto-Primes unique design incorporates a variable capacity vane pump which quickly and automatically evacuates air and vapor, making them ideal for loading, off-loading transports and stripping hoses.

Whenever air or vapor is present at the start of the pumping operation - or when there is a loss of suction because of air or vapor during pumping - the priming pump automatically moves air and vapor from the suction line to discharge line. Once the flowing liquid from the centrifugal portion of the pump builds up sufficient pressure in the discharge system, the pressure backs up through a tube to act on the bottom of the priming pump's movable slide block, placing it in a neutral position. Under these conditions the priming pump no longer evacuates a small amount of liquid.

The small powerful vane-type pump found within the main centrifugal housing can prime an absolutely dry 4-inch (102 mm) 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.

Constructed out of rugged ductile iron or cast steel housing, heavy-duty steel or stainless steel shafts, fluorocarbon fitted mechanical shaft seal with aluminum impellers. Available in either pump only models or with installed air release for your convenience (shown with installed air release). Additional air release kits available for Ethanol and other solvent applications.

FEATURES

• 4 in. Suction, 3 in. Discharge
• 1800 RPM
• Max Capacity: 720 GPM
• Max Head: 135' TDH
• Max Solids: 0.5
• Max Temperature: 160° F
• Heavy-Duty Steel or Stainless Steel Shafts
• Fluorocarbon Fitted Mechanical Shaft Seal with Aluminum Impellers

OPTIONAL ACCESSORIES

• Stainless Steel Pump Shafts
• Bronze Impellers
• Teflon Seal (Fluorocarbon O-Ring)
• Seal for Ethanol (E10)
• Air Release Valve w/SST Floats for Ethanol Applications
• Group Grind (Iron Rotors)

For proper operation of this pump, it is a requirement to check the chemical resistance chart before ordering. If the pump is used for an application that the pump material is not compatible with the warranty will be voided.