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HLB Series Metering Pumps

The tough and wear resistant H series Zenith pump series is designed for high temperature and viscosity service. The H series pumps provide precise, pulse free, repeatable flow in market segments such as adhesives, additives, polymers, plasticizers, oils, tars, inks and fibers.



Available Capacities
10 – 50 cc / rev
Flow Rate
0.008 – 2.4 gpm
Max Inlet Pressure
Up to 40 psi
Max Discharge Pressure
Up to 4,000 psi
Viscosity Range
cps Up to 2,000,000


  • High Accuracy. Stable, repeatable flows are assured even under varying conditions of pressure, viscosity and temperature.
  • Minimum Pulsation. Unique design offers virtually pulseless flow without valves or flexible elements to hinder performance
  • High Temperature Capability. Operating temperatures to 950°F (510°C).
  • Maximum Life. Only three moving parts; components are through hardened tool and die steels to 64 Rc or better. Replaceable sleeve bearings for low-cost rebuilds.
  • High Volumetric Efficiency. Maximum efficiency is achieved with optimum operating clearances and assured under pressure by built-in alignment dowels.
  • Precision Construction. Ground and lapped components for close of operating clearances.


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