SUN HYDRAULICS
FQIAXAN

***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 FQIAXAN (FQIAXAN) is a flow fuse cartridge designed to maintain the position of a hydraulic actuator in the event of a hose or line break. This spool-type valve allows fluid flow to and from the actuator but closes instantly if the flow exceeds its set threshold, effectively preventing uncontrolled actuator movement. It incorporates Sun's floating style construction to minimize internal part binding due to excessive installation torque or machining variations. With a cavity type of T18A and a series designation of 4, this model has a capacity of 50 gpm (200 L/min) and can operate at a maximum pressure of 5000 psi (350 bar). The valve has a hex size of 1-5/8 inches (41.3 mm) and requires an installation torque between 350 and 375 lbf-ft (475 to 508 Nm). Weighing 2.90 lb (1.30 kg), it features Viton seals with an optional seal kit available under part number 990018006. The FQIAXAN is sensitive to transient flows above its setting, necessitating careful selection of its flow rating\u2014ideally at least 25% above the maximum normal system flow, though up to 50% is recommended for optimal performance without false tripping. This valve resets when pressures at ports one and two are equalized but may experience some leakage, resulting in minor actuator drift. It's crucial for users to specify their required flow rating when ordering this valve, as factory settings are within \u00b110% of the requested value. This product is not suitable for preventing oil loss or providing fire protection; it's specifically engineered for preventing uncontrolled actuator movement during hose failures.