DH220-5 HYDRAULIC MAIN RELIEF VALVE

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Product details

DH220‑5 MAIN RELIEF VALVE

Product Overview

DH220‑5 Main Relief Valve is a threaded‑in CARTRIDGE VALVE, a critical Hydraulic valve for Doosan DH220‑5 excavator Machine. As the safety pressure‑control component of the hydraulic system, this cartridge‑style Hydraulic valve limits maximum working pressure, protects the whole hydraulic system from pressure spikes, and ensures stable operation of the excavator Machine. It is an ideal aftermarket replacement for worn‑out original relief valve units during equipment overhaul .

Technical Specifications

- Model: DH220‑5 Main Relief Valve

- Product Type: CARTRIDGE VALVE, Main Relief Hydraulic valve

- Compatible Machine: Doosan DH220‑5 excavator

- Mounting: Threaded cartridge installation into main control valve block

- Function: System pressure limiting, overload protection for hydraulic system

- Working Medium: Anti‑wear hydraulic oil

- Feature: Adjustable pressure setting, quick‑response pressure relief

Working Principle

As a key CARTRIDGE VALVE inside the main control valve, this Hydraulic valve monitors the pressure of the hydraulic system. When oil pressure exceeds the preset threshold, the valve spool opens to discharge excess hydraulic oil back to the oil tank. This action prevents over‑pressure damage to hydraulic pumps, cylinders and other parts of the Machine. It maintains stable system pressure to support smooth digging, slewing and traveling movements of the excavator.

Core Advantages

1. Strict original‑dimension matching, high interchangeability for DH220‑5, easy installation without modifying the valve block of the Machine.

2. Precision‑machined spool and seat, low internal leakage, keeps steady pressure regulation for the hydraulic system.

3. Fast response to pressure surge, effectively protects the whole hydraulic system from overload damage.

4. High‑strength alloy material, good wear‑resistance, adapts to frequent heavy‑load cycles on construction sites.

5. Reliable sealing structure, reduces oil leakage, lowers maintenance frequency for the Machine.

Application Scope

This DH220‑5 CARTRIDGE VALVE is specially designed for Doosan DH220‑5 excavator Machine. It is the core safety Hydraulic valve of the main hydraulic system. Widely used in excavator repair workshops, to restore normal pressure performance and solve common faults such as weak movement and system over‑pressure.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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