The Parker IB7521 is a genuine ISO B insert type overload relief valve, engineered for robust hydraulic system protection. This high-performance valve features a 3/4-16 UNF thread for C-10-2 cavities, a nominal flow rate of 80 L/min (20 GPM), and a maximum operating pressure of 350 bar (5000 psi). Designed to prevent damage from pressure spikes, the IB7521 offers an adjustable cracking pressure range of 70-350 bar. Constructed from durable steel with reliable Nitrile seals, it ensures long-term stability and precise pressure control in demanding agricultural, construction, and industrial applications.