SUN HYDRAULICS
FQBAXAV

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics FQBAXAV (FQBAXAV) is a flow fuse cartridge designed to maintain the position of a hydraulic actuator in the event of a hose or line break. This valve allows fluid to flow to and from the actuator under normal conditions but instantly closes if the flow exceeds a pre-set threshold, effectively preventing uncontrolled movement. It is crucial to specify a flow rating when ordering, as factory settings are within 15% of the requested specification. The valve closes when the flow from port 1 to port 2 surpasses its setting and resets when pressures at both ports equalize. To ensure proper function, the flow setting should be at least 25% above maximum normal system flow. This spool-type valve may experience some leakage, leading to potential actuator drift. It features Sun's floating style construction, which minimizes internal part binding due to excessive installation torque or machining variations. The FQBAXAV fits into cavity T-162A and belongs to series 0, with a capacity of 2.25 gpm (8.5 L/min) and can handle pressures up to 5000 psi (350 bar). Maximum valve leakage at 110 SUS (24 cSt) is rated at 1 in\u00b3/min at 1000 psi (15 cc/min at 70 bar). The hex size for installation is 3/4 inch (19.1 mm), requiring an installation torque between 20 - 25 lbf ft (27 - 34 Nm). A Viton seal kit is available for this cartridge under part number 990162006. This product should not be used for oil loss prevention or fire protection but rather as a safety measure against hose failure-induced uncontrolled actuator movement. Proper selection and tuning based on system specifications are essential for optimal performance without false tripping during transient flows.