self-priming centrifugal pumps petroleum pumps roto-prime® self-priming centrifugal pumps are...
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Self-Priming Petroleum PumpsRoto-Prime® self-priming centrifugal pumps are specifically designed for pumping petroleum products, petrochemicals and solvents. The Roto-Prime 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.
ROTO-PRIME® SELF-PRIMING CENTRIFUGAL PUMPS
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Full Priming – With air or vapor in the lines, pressure of the spring on top of the movable slide holds the priming pump in full pumping position.
Partial Priming – As the pump evacuates air and vapor from the lines, liquid pressure builds up on the underside of this slide, moving it upward toward neutral.
Neutral – When air and vapor are removed, liquid pressure equalizes spring pressure and the pump automatically slides into neutral… where it remains until air and vapor again appear 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 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 pressures up to 8 pounds per square inch.
OPTIONAL AIR RELEASEThe GRP33-06 air release valve evacuates air in the suction line to ensure positive self-priming even when pumping against moderate to high static heads.
Sealed End Ball Bearings
Mechanical Seal
Balanced Impeller
Volute
Suction Inlet
Variable Displacement Priming Pump
ROTO-PRIME SELF-PRIMING CENTRIFUGAL PUMPS
Full Priming
Partial Priming
Neutral
ROTO-PRIME PROvIdES AUTOMATIC, POSITIvE PUMPINGWhenever 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.
PRIMING
PRIMING COMPLETEd
Discharge Outlet
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U.S. GALLONSPER MINUTE
PER MINUTE
TOTAL HEAD
M PSI FT
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COMPOSITE OF PERFORMANCE CURVESCurves are based on a specific gravity of 0.8 RS Series
RS2A-B
RS3A-B
RS5A-B
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U.S. GALLONSPER MINUTE
PER MINUTE
TOTAL HEAD
M PSI FT
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350
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250
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150
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140
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LITERS
COMPOSITE OF PERFORMANCE CURVESCurves are based on a specific gravity of 0.8 RD Series
RD2A-B
RD3A-B
RD4A-B
MATERIALS OF CONSTRUCTIONPumps have rugged ductile iron or cast steel housings, heavy-duty steel or stainless steel shafts, fluorocarbon fitted mechanical shaft seal with aluminum impellers. Consult the factory for optional Teflon® seals for today's liquid requirements.
Sizes range from 3" x 2" (76.2mm x 50.8mm) up to 6" x 5" (152.4mm x 127mm), capacities to 1450 gpm (91.3lps), heads to 390 feet (118.9m).
The single volute (RS) pump operates at 1750 rpm, with the double volute (RD) pump operating at 3450 rpm.
OPTIONAL ACCESSORIESStainless steel pump shafts, bronze impellers, companion flanges, swing check valves and mechanical seals are available to meet today's pumping needs.
Teflon® is a registered trademark of E.I. DuPont
AV-05972 1/07 Printed in the USA
Gorman-Rupp InternationalP.O. Box 1217Mansfield, Ohio 44901-1217Tel: 419-755-1011Fax: 419-755-1266E-mail: [email protected]
The Gorman-Rupp CompanyMansfield DivisionP.O. Box 1217Mansfield, Ohio 44901-1217Tel: 419-755-1011Fax: 419-755-1251E-mail: [email protected]
www.GRpumps.com©2007 The Gorman-Rupp Company. All rights reserved.
Gorman-Rupp of Canada, Ltd.70 Burwell RoadSt. Thomas, Ontario N5P 3R7, CanadaTel: 519-631-2870Fax: 519-631-4624E-mail: [email protected]
Product information is subject to change; consult factory for details.
Learn More about Gorman-Rupp Roto-Prime Pumps For more information on Gorman-Rupp Petroleum pumps go to www.GRpumps.com