Fluid handling, regulation and control

Fluid handling, regulation and control

Fluid handling, regulation and control

VIKING Ammonia – Internal gear pumps



The Viking 4924A Series Positive Displacement (PD) pumps offer safety, reliability and high efficiency in refrigeration ammonia recirculation applications. Safety is achieved through use of a double mechanical dynamic shaft seal located between bearings for minimum possible shaft run-out, with a pressurized barrier fluid system, and O-ring type static seals where components are joined. Reliability is provided by slow speed operation and low differential pressures, which maximize bearing and seal life. And efficiency is inherent in the PD Internal Gear pumping principle, compared to centrifugal pumps. Viking pumps can usually use at least one motor size smaller than these technologies.


  • Max. Capacity: 60 GPM (14 M³/hr)
  • Max. Pressure: 50 PSI (3.5 BAR)
  • Max. Viscosity: N/A
  • Temperature Range: Down to -40°F (-40°C)
  • Sealing / Coupling: Double Mechanical Seal
  • Porting: Right Angle (90°), NPT/BSP, Flanged
  •  Mounting: Foot Mount


  • Double mechanical seals with pressurized seal chamber and oil reservoir pressurized by ammonia, no external flush system required.
  • Adjustable return-to-tank pressure relief valve.
  • Pressure-lubricated idler bushing maximizes bushing life.
  • Designed for ammonia refrigeration systems.


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