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Spool Type, Pilot Operated, Metric Cartridge – DB12121PF-01

Pressure relief DB12121PF-01

The pressure relief valve DB12121PF is a pilot operated, spool valve with a remote control option via the additional port 3.

Therefore, if the pressure across port 1 exceeds the pre-set value, the pilot-stage opens and oil flows from behind the main spool to the tank port 2. Then, the resulting pressure differential allows the main spool to lift against the reset-spring and allows oil to flow from port 1 to port 2. Additionally, the valve may switch the system to unpressurized flow by draining a flow over port 3.

See datasheet for drawings, dimensions, model code, etc…


  • External surfaces zinc-plated and corrosion-proof
  • Hardened and ground control spool to ensure minimal wear and extended service life
  • Various pressure ranges up to 350 bar
  • Quick response
  • Increased operating reliability due to protective strainer
  • Low hysteresis and excellent stability throughout the flow range
  • Compact design enables space-saving installation in connection housings and control blocks
  • Finally, valve can be operated via its remote control line in combination with a directional valve.
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