The Isis Fluid RV58-20 is a screw-in hydraulic relief valve which is cartridge style, direct acting poppet-type, mainly used for lower flow circuits requiring low internal leakage having higher pressures.

Rated for higher operating pressure of 345 bar
Bi-directional pressure option available
Adjustments cannot be backed out of the valve
Adjustments prohibit springs from going solid
Variety of adjustment options available
Rapid response to pressure changes
Compact size