Gear Pump · Pumps
Utilizing external gear technology, the SG Series™ spur gear pump by Viking Pump is designed for high pressure and efficient performance in a variety of industrial applications. This robust pump can handle flows up to 190 GPM (719 LPM) and pressures up to 500 PSI (34 Bar), making it suitable for tasks such as pipeline injection, sampling, and oil polishing. The SG Series™ is constructed from ductile iron, ensuring durability and reliability in demanding environments. The pump features needle bearings that enhance its high-pressure capabilities, with options for sleeve bearings available upon request. It offers flexible mounting configurations, including close-coupled motor mounts or foot brackets, to fit various space requirements and motor specifications. Additionally, double pump configurations are available, providing two flow rates from a single power source, which can significantly reduce equipment costs. The SG Series™ is versatile in its porting options, offering standard NPT connections ranging from 3/8 inch to 4 inches, as well as SAE connections for larger capacities. It supports a wide range of viscosities, from 1 cSt (28 SSU) to 250,000 cSt (1,000,000 SSU), and can operate at temperatures from -40°F (-40°C) to +450°F (+230°C). Specific models like the SG-1456 are optimized for high flow rates up to 190 GPM at a maximum pressure of 190 PSI (13 Bar), while maintaining a temperature range of 225°F (105°C). This pump is designed with options for direct-mounted, motor-mounted, and bracket-mounted drives, as well as foot mounting. Sealing options include lip seals, mechanical seals, and magnetic drive configurations to suit different operational needs. Whether you require precise control in a compact setup or the power to handle large volumes, the SG Series™ by Viking Pump is engineered to meet your industrial pumping requirements with reliability and efficiency.
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| Suction strainer inspection/cleaning | typically every 250-500 hours or per the system's fouling rate |
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| Mechanical seal inspection | typically every 4,000-8,000 hours or on leakage |
| Coupling alignment check | at each overhaul or after any disturbance to piping or foundation |
| Internal clearance/gear wear check | condition-based, typically 8,000-12,000 hour intervals or on falling performance |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Gear/bushing radial clearance | condition-based - the maker typically specifies a maximum clearance before flow/pressure performance drops unacceptably; confirm against Viking Pump's service manual for the specific SG frame size |
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Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Pumps in fuel oil or lube oil transfer/polishing service typically fall under general machinery survey rather than a dedicated pump notation; class will want to see the relief valve correctly set and evidence of routine seal/leakage inspection, particularly on fuel or lube oil duty.
Estimated lifetime: Well-maintained external gear pumps of this type typically run for years between bushing/seal renewals, with actual life driven mainly by fluid cleanliness and dry-running incidents rather than calendar time - no single generic hour figure applies.
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