4227C Series Universal Product Line Stainless Steel Internal Gear Pumps
The Universal Product Line 4227C Series has the broadest range of sealing options of all pumps built by Viking Pump®.
The U-Plus™ bracket design accepts numerous component seals for use in the stuffing box or behind the rotor, packing, cartridge seals and Viking Pump’s own O-Pro® seals. These products come standard with a jacketed head and bracket.
Viking Pump’s 4227C Series is most versatile line of internal gear pumps with many design and material options. These series are available with the ProPort™ casing and a wide variety of flange types and sizes as well as both 90 degree and opposite port arrangements* enabling flexibility when connecting pumps to piping.
Viking Pump 4227C Series Features & Benefits
• For acids and caustics, the positive displacement internal gear pump ensures accurate, non-pulsating flow with materials engineered for chemical resistance, providing safe and reliable transfer of corrosive fluids across a broad viscosity range.
• ProPort™ Casing (4227C Series™): » Adaptable port design offers a variety of ports sizes and types, enabling flexibility when connecting pumps to piping. » Casing drain allows the pump to be drained without removing the head. » Optional O-ring joint seals for high pressure or difficult to seal applications. » Internal circulation promotes flow behind the rotor.
• U-Plus™ Bracket (4227C Series™): » Seal options include packing, O-Pro® Guard Seal, single component seals, cartridge lip seals and cartridge single and double mechanical seals. Various seal flush plans are available. » Stainless steel window guards offer protection from rotating parts.
• Footed one-piece stainless steel bracket provides rigid mounting to help maintain alignment, which extends seal and bearing life.
• Series designed with an enlarged bearing housing; used in conjunction with a spacer coupling permits easy cartridge seal or O-Pro® Guard seal installation and removal in place without removing the head and rotor/shaft.
• Stainless steel construction for reliable handling of corrosive liquids.
• Axial rotor thrust is controlled by double row ball bearing or tapered roller bearings; bushings provided a secondary point of radial shaft support.
• Rotatable bearing housing provides easy rotor end clearance adjustment to compensate for viscosity or wear.
• Numerous material options are available for bushings, idler pins, shafts, rotors, idlers and elastomers.
• Gear and pump geometry has been optimized based on more than 100 years of experience.
• Can be used with direct drive, gear reducer or gearmotor drive, or belt-drive.
Specifications
Capacity: to 320 GPM, to 73 m³/h
Viscosity: 28 to 2,000,000 SSU, 0.1 to 440,000 cSt
Pressure: to 150 PSI, to 10 BAR
Temperature: -120°F to +500°F, -85°C to +260°C
Porting: Right Angle (90°) (Rotatable Casing), H-Q, Opposite (180°) (Rotatable Casing), H-QS NPT Flanged (ASME / ANSI or DIN Compatible)
Drives: R Offset Gear Reducer Drive | P Purchased Gear Reducer Drive | D Direct-Mounted Drive, H-HL | V Drive | V-Belt Drive
Mounting: Foot Mount
Sealing: Mechanical Seals | Component Mechanical Seal | Cartridge Mechanical Seal
Typical Applications: Soaps, Detergents & Surfactants I Acids & Caustics I Water-based Liquids I Vegetable Oil I General Chemicals

