ZM

Electrically operated gear pump for use in oil circulation systems

They consist of a gear pump, a flange, a coupling and an electric motor. The pump design suits mounting separately from the reservoir or vertically on top of the reservoir. The ZM family offers single-circuit and multi-circuit pump units.


ZM single-circuit gear pump units

ZM single-circuit gear pump units are used in small oil circulation lubrication systems with pressure ranges up to 30 bar (435 psi) and high viscosities up to 2 000 mm2/s. They consist of a gear pump, a flange, a coupling and an electric motor. The pump design suits mounting separately from the reservoir or vertically on top of the reservoir. Horizontal flange mounting below lubricant level is not allowed. ZM gear pump units come without integrated pressure relief and venting valves.

Features and benefits

  • High viscosity range
  • Low noise operation
  • High operating back pressure
  • Easy system planning

ZM multi-circuit, self-priming gear pump units

ZM1002

ZM multi-circuit gear pump units are self-priming and valveless pumps. They are used in oil circulation lubrication systems with 2 to 20 separate delivery circuits. Unused outlets must be returned to the reservoir. The pumps consists of an electric motor, adapter flange, coupling and a gear pump. The pump can be mounted separately from the reservoir or as a flanged pump on the reservoir. A special design with seals for horizontal mounting below lubricant level is available. The fluids to be pumped must have enough lubricity for the pump to lubricate itself.

Some of these distribution pumps require an attached, single-circuit priming pump that operates separately. The priming pump restricts differential pressure within the multi-circuit pumps and helps to provide uniform delivery rates. It is advisable to filter the oil upstream of the distribution pump inlet.

Features and benefits

  • High viscosity range
  • Flexible due to up to 20 circuits per pump
  • Suitable for hydrostatic operation
  • Easy system planning
  • Space-saving pump design
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