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Spool Type, Pilot Operated, Metric Cartridge – DB12121PE-01

Pressure Relief valve DB12121PE-01

The DB12121PE is a pilot-operated, spring-loaded spool valve with a pilot drain at port 3.

HYDAC pressure relief valve DB12121PE, corrosion-proof with ground control spool:

This means that any pressure at port 2 has no influence on pressure adjustment. Therefore, if the pressure at port 1 exceeds the preset spring tension, the pilot-stage opens. The oil will flow from behind the main spool to tank port 3. Therefore, the resulting pressure differential causes the main spool to move against the reset-spring. This movement will allow the oil to flow from port 1 to port 2.

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
  • Additional tank connection to drain the pilot stage
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HYDAC Australia

HYDAC New Zealand

AUSTRALIA 1300 449 322

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