Sun Hydraulics 251251-C Valve (ZTB) is a Sun Hydraulics hydraulic cartridge valve identified by the ZTB designation in the Sun Sandwich Catalog. The ZTB designation appears in both the US and UK editions of Sun's catalog, indicating a specific valve family within Sun's cartridge valve lineup. Sun's cartridge valves are designed to control force, speed, and motion in hydraulic circuits and are used within manifolds and power units to provide compact, high-performance fluid power control. Sun Hydraulics, now part of Helios Technologies, designs cartridge valves rated up to 5,000 psi with flows up to 400 gpm across five cartridge size series.
