| After-sales Service: | Online Support |
|---|---|
| Warranty: | 6 Months |
| Type: | Valve |
| Application: | Excavator |
| Certification: | CE |
| Condition: | New |
| Customization: |
|---|
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Excavator Hydraulic Valves Relief Valve 4289604 Fits Hitachi Ex200-2
| Compatible Models | Ex200-2 |
| Part Number | 4289604 |
| Part Name | Relief Control Valve |
| Application | Excavator |
| Delivery | Express/Air/Sea |
| Item Type | Relief Valve |
| Condition | New Original/OEM High Quality |
| Availability | Stock |
| Operating Voltage | 24V |
| Quality | OEM Best Quality |
Types of Relief Valves There are several types of relief valves available, including direct-acting relief valves, pilot-operated relief valves, and proportional relief valves.
Direct-acting relief valves are the simplest type of relief valve and consist of a spring-loaded poppet that is held closed by a spring. When the pressure in the hydraulic system exceeds the spring force, the poppet opens and allows fluid to escape.
Pilot-operated relief valves are more complex than direct-acting relief valves and use a pilot valve to control the opening and closing of the main valve. The pilot valve is typically controlled by an external signal, such as pressure or flow rate.
Proportional relief valves are designed to provide variable pressure relief based on an input signal. They are commonly used in applications that require precise control over pressure, such as in hydraulic presses or injection molding machines.
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