Counterbalance valves are specialized hydraulic pressure control valves designed to maintain load holding and prevent uncontrolled lowering by modulating actuator pressure. Key product types include screw-in counterbalance cartridges and sandwich-style valves, with prominent Parker CB series counterbalance sandwich valves and Parker ZNS series counterbalance valves represented in this category. Parker counterbalance valves offer a range of setting pressures, pilot-assisted options, and compact configurations, providing stable load control and safety in hydraulic systems supported by original Parker components and express shipping.