Description
Viking 123A Universal Seal Pump & Heavy-Duty Bracket Mounted Universal Seal
The Universal Product Line has the broadest range of sealing options of all pumps built by Viking. The stuffing box on all sizes accepts packing, numerous component single mechanical seals, or a wide variety of cartridge seals. The Universal Product Line is Viking Pump’s most versatile line of internal gear pumps due to the availability of many design and material options.
Positive Displacement Internal Gear pumping principle handles a broad range of viscosities with a constant flow rate
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
Footed steel bracket provides rigid mounting to help maintain alignment, which extends seal and bearing life
Can use direct drive, gear reducer or gear motor drive, or belt-drive
Pressure relief valve standard on non-jacketed pumps; less valve / plain head option available
Series designed with an enlarged bearing housing; used in conjunction with a spacer coupling permits easy cartridge seal installation and removal in place without removing the head and rotor/shaft.
Seal options include packing, single component seals, cartridge lip seals and cartridge single and double mechanical seals; various seal flush plans are available
Steel externals for petroleum refineries, petrochemical plants and similar customers who require higher temperature and higher working pressures than cast iron pumps can provide
Options
SPECIAL MATERIALS & OPTIONS SELECTION GUIDELINES
For High Viscosities – Above 2,500 SSU (550 cSt)
• Steel fitted construction recommended above the following viscosities, according to pump size:
Viscosity Pump Size
H HL K KK LQ LL LS Q QS N R RS
SSU 25,000 7,500 25,000 75,000 25,000 2,500 75,000 7,500 75,000 75,000 25,000 75,000
cSt 5,500 1,700 5,500 17,000 5,500 550 17,000 1,700 17,000 17,000 5,500 17,000
• Extra clearances, depending on viscosity. See ES-2 for recommendations.
• Special Sealing:
FKM or Buna N Type 1 component seals good up to 15,000 SSU (3,300 cSt).
PTFE Type 9 seals good up to 25,000 SSU (5,500 cSt).
Packed gland good up to 2,000,000 SSU (440,000 cSt).
Cartridge triple lip seals available to 2,000,000 SSU (440,000 cSt).
• Larger ports may be required depending on suction conditions.
• Pump should be operated at slower than normal speeds, which may require a larger pump.
• For viscosities over 250,000 SSU (55,000 cSt), contact factory for additional pump construction and operation
recommendations.
For low viscosities or non-lubricating liquids – Below 100 SSU (20 cSt)
• Carbon graphite bushings.
• Pump should be operated at slower than normal speeds, which may require a larger pump.
For high temperatures – Above 225°F (105°C)
• High temperature elastomers – FKM up to 350°F (175°C); Buna up to 225°F (105°C); PTFE up to 450°F (230°C);
• High temperature bushings recommended depending on temperature, size and specific material.
See ESB-3 for recommendations.
• Additional operating clearances may be required depending on temperature, size and specific material.
See ES-2 for recommendations.
• For temperatures above 450°F (230°C), special materials and sealing requirements may be needed.
Contact factory for recommendations.
• Pump should be operated at slower than normal speeds, which may require a larger pump.
For abrasive or dirty liquids
• If possible, filter or strain out the abrasives present.
• Wear resistant bushings – hardened cast iron, tungsten carbide or Colmonoy coated.
• Abrasive-resistant idler pin – tungsten carbide or Colmonoy plus TC filler coated pins.
• Hardened or hard-coated shaft.
• Abrasive-resistant seals.
• For high concentrations of abrasives or particle sizes greater than 250 microns (0.010 in), contact factory for recommendations.
• Pump should be operated at slower than normal speeds, which may require a larger pump.
• Consult factory for specific recommendations
