Metering valves

Metering valves are hydraulic restrictors. The following factors affect the metered quantity:
  • Pump pressure
  • Operating viscosity of the oil
  • Geometry of the centralized lubrication system
  • Line cross-sections
  • Back pressures downstream of the metering valve distributor

Metering valve systems are often operated with piston pumps that distribute the pump's entire volume throughout the system with each delivery stroke. For the lubricant to be apportioned as desired it is necessary for the hydraulic resistance of the metering valves to be greater than the pressure losses in the tubing.

Hydraulic metering valves are available in various designs to handle the respective quantity and viscosity:
  • as a fine annular gap
  • as a helical coiled rectangular cross section (helical coil)
  • as a sinter insert or felt insert

Besides non-adjustable metering valves, there are adjustable metering valve distributors allowing the flow rate to be individually regulated. Metering valves are used for total loss lubrication systems and circulating lubrication systems.

In the table you can find the technical details of metering valves.
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