ZX55 Variable Main Relief Valve

The ZX55 Variable Main Relief Valve is a dedicated adjustable pressure control core component for Hitachi ZX55 series mini excavator hydraulic systems, also compatible with industrial PU foaming auxiliary hydraulic equipment. Developed for precise operation and dynamic load fluctuation of small construction machinery, it is widely applied in municipal engineering equipment, agricultural renovation machinery, precision PU foaming lines and high-pressure hydraulic casting units. Different from fixed relief valves, it supports stepless wide-range pressure adjustment to match diverse working conditions, effectively solving common defects such as limited pressure adaptation, low-pressure jitter and delayed overpressure relief, ensuring stable and accurate hydraulic system operation. Fully compatible with complete PU Foaming Hydraulic Components, it seamlessly cooperates with all linear mixing head hydraulic modules and adapts to low and high-viscosity PU material delivery for various produ…

Pressure Relief Valve Hydraulic Control Valves Hydraulic Safety Valve PU Mixing Head Magnetic Coupler