DH80 Small Excavator Relief Valve Main Circuit Overload Protection Steel Cartridge Parts

Q1: Which Doosan mini excavators fit ZVEZDA DH80 main relief valve?

A: Direct replacement for Doosan DH80 mini excavators, standard cartridge size, directly insert into main valve block without modifying valve cavity. In stock, ship within 1–7 working days.

Q2: Excavator still weak digging and engine stall under heavy load after replacement?

A: Fatigued pressure spring leads to drifted relief pressure, replace complete ZVEZDA integrated main relief cartridge to restore standard main circuit pressure and normal digging power.

Q3: Can this main relief valve replace fuel rail pressure sensor or oil pressure switch?

A: Not interchangeable. This high pressure hydraulic cartridge valve is used for main circuit overload protection; fuel sensor detects diesel pressure, oil pressure switch is mechanical low pressure lubrication alarm part, different medium, pressure range and working principle.

Q4: Core advantages of ZVEZDA DH80 main relief valve?

A: High strength alloy steel anti-wear spool, high fatigue resistant silicon manganese pressure spring, stable fixed relief pressure, double-layer HNBR high pressure anti-leakage sealing, full anti-rust precision ground cartridge body, OEM standard cartridge dimension direct replacement, neutral unbranded packaging, perfectly match DH80 main hydraulic overload protection system.