Viking-Built Double Pumps
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Like getting two pumps in one! VIKING–BUILT DOUBLE PUMPS Viking double pumps are ideally suited to many applications in the industrial and mobile markets. Two independent pumping units are operated from a single power source to reduce equipment costs and simplify installation. System flexibility is maintained as each pumping unit can be operated at a different pressure without affecting the other. A total of 96 different double pump combinations are available to match your requirements. A special version of the double pump has an integral hi-lo circuit. This arrangement has the advantage of providing a fast cycle time and at the same time reduces the HP required by unloading the high volume pump when it is not needed. A double pump with an integral hi-lo circuit basically consists of a high volume and low volume set of pumping elements, a built-in unloading valve and a built-in check valve. The hydraulic circuit is arranged to provide rapid advance, feed and rapid return. The total volume from both sets of pumping elements is delivered until the work load is contacted. At this point, system pressure increases causing the unloading valve to function. Flow from the high volume set of pumping elements is directed back to the suction side of the pump at minimum pressure. The low volume set of pumping elements continues to deliver flow for the high pressure feed part of the operation. Both sets of pumping elements deliver flow on the return stroke. VIKING PUMP

VIKING DOUBLE PUMPS SERIES GP-04, GP-05, GP-07 * Note: Ductile iron construction and combinations of the 04 and 05 pump sections are available, consult factory. DOUBLE PUMP MODEL NUMBERING CODE GP - 05 18 25 - E 0 - B EXTERNAL GEAR PUMP PRINCIPLE DRIVE EQUIPMENT B = FOOT MOUNTED BRACKET D = BASE MOUNTED DIRECT DRIVE M = C-FLANGE MOTOR DRIVE M4 = FOUR-BOLT MOTOR DRIVE *FIRST PUMP CAPACITY (SMALLER) *SECOND PUMP CAPACITY (LARGER) DESIGN SERIES G = HEAVY DUTY H = HEAVY-DUTY WITH HI-LO CIRCUIT * FOR TOTAL PUMP CAPACITY ADD THE GPM RATING OF EACH SECTION: (1825 = 0.7 + 1.0 for TOTAL of 1.7 GPM @...

VIKING DOUBLE PUMPS SERIES GP-04, GP-05, GP-07 PUMP SELECTION To determine whether a pump is rated for continuous or intermittent duty, use Figures 2, 3 and/or 4 to arrive at the number of units for each pumping section. These values should be based on the maximum pressure expected from each pumping section during simultaneous operations. Add the units for each pumping section together. Use this total number of units and Figure 1 to arrive at a service cycle rating. EXAMPLE: GP-052510 with the 25 section at 1500 PSIG and the 10 section at 200 PSIG. Figure 3 shows the 25 section yields 88...

VIKING DOUBLE PUMPS SERIES GP-04, GP-05, GP-07 HORSEPOWER REQUIREMENTS Figures 5, 6, 7, 8, 9 and 10 relate required horsepower to discharge pressure for each pump section. Total horsepower required for the double pump is found by adding the requirements for each pump section. EXAMPLE: Using the pump from the first example (page 3) operating at 1750 RPM (Figure 7), the 25 section yields a horsepower requirement of 1.1 and the 10 section yields a requirement of 0.6. Total horsepower required is 1.7. PUMP DISCHARGE PRESSURE – PSIG PUMP DISCHARGE PRESSURE – PSIG PUMP DISCHARGE PRESSURE – PSIG...

VIKING DOUBLE PUMPS SERIES GP-04, GP-05, GP-07 1000 1500 2000 PUMP DISCHARGE PRESSURE – PSIG 1000 1500 2000 PUMP DISCHARGE PRESSURE – PSIG GENERAL INFORMATION HYDRAULIC OIL The best performance can be obtained by utilizing an industrial grade hydraulic oil. Operating viscosity should be between 100 and 300 SSU. Temperature should not exceed 150°F. for optimum life of the hydraulic oil. STANDARD CONSTRUCTION Quality materials and precision manufacturing are used in every pump with the following materials as standard: ■ Head, Casing and Bracket — cast iron ■ Gears — Heat-treated steel (GP-04...

VIKING DOUBLE PUMPS PUMP DIMENSIONS, Series GP-04, GP-05 HEAVY-DUTY DOUBLE PUMP FOUR HOLES SEPARATE SUCTION & DISCHARGE PORTS COMMON SUCTION SEPARATE DISCHARGE PORTS SEPARATE SUCTION COMMON DISCHARGE PORT HEAVY-DUTY DOUBLE PUMP WITH HI-LO CIRCUIT DISCHARGE PORT SUCTION PORT * SUCTION PORT * CIRCUIT DIAGRAM t WHEN OPERATING 10 OR 14 SECTION PUMPS ABOVE 1800 RPM OR HANDLING LIQUIDS WITH VISCOSITIES ABOVE 300 SSU, CONSULT FACTORY FOR PORT RECOMMENDATIONS. *1/2" NPT SUCTION PORT IS STANDARD ON ALL PUMP MODELS EXCEPT THOSE WITH A 14 SECOND SECTION (GP-05xx14-CO). THEN 3/4" NPT PORT IS STANDARD....

VIKING DOUBLE PUMPS SERIES GP-04, GP-05, GP-07 PUMP DIMENSIONS, Series GP-07 Pump Model/Size HEAVY-DUTY DOUBLE PUMP SEPARATE SUCTION & DISCHARGE PORTS COMMON SUCTION, SEPARATE DISCHARGE PORTS SEPARATE SUCTION, COMMON DISCHARGE PORT HEAVY-DUTY DOUBLE PUMP WITH HI-LO CIRCUIT † WHEN OPERATING 11 OR 16 SECTION PUMPS ABOVE 1800 RPM OR HANDLING LIQUIDS WITH VISCOSITIES ABOVE 300 SSU, CONSULT FACTORY FOR PORT RECOMMENDATIONS. VIKING PUMP • A Unit of IDEX Corporation • Cedar Falls, IA 7

VIKING DOUBLE PUMPS SERIES GP-04, GP-05, GP-07 MOUNTING OPTIONS Viking Double and Hi-Lo Double pumps offer efficient gear set combinations allowing maximum pressure with minimum horsepower. Hi-Lo Double pumps include a highly-efficient sequencing valve and a heat-treated guided poppet check valve. GP-05 “B” DRIVE FOOT-BRACKET MOUNTED A sturdy cast iron bracket, cast and machined by Viking, assures accurate fit with the pump. Mountings are available for all sizes of Double and Hi-Lo Double pumps. FOUR-BOLT MOTOR MOUNTED UNIT Integral pump and motor units help reduce on-site assembly costs...