SD25 Heavy-Duty Hydraulic Valve for Excavators & Cranes

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Product details

SD25 Heavy-Duty Hydraulic Valve for Excavators & Cranes

Product Overview

SD25 heavy-duty hydraulic valve is a robust sectional hydraulic valve developed for excavators, mobile cranes and other medium-duty mobile machinery. As a reliable hydraulic valve, it accurately controls the direction, flow and pressure of hydraulic oil in the hydraulic system, realizing coordinated and stable motion control for your Machine. Its modular sectional structure allows flexible customization of spool numbers to satisfy multi-function operation requirements of construction and lifting equipment.

Technical Specifications

- Rated flow: 250 L/min

- Maximum working pressure: 350 bar (5075 psi)

- Spool quantity: 1~12 sections, customizable

- Control modes: manual, cable remote, hydraulic, electro-hydraulic control

- Circuit type: parallel circuit / load sensing circuit optional

- Built-in components: main pressure relief valve, independent load check valve, anti-cavitation valve for each section

- Operating temperature: -30℃ ~ +70℃

- Port connection: G, NPT, SAE thread optional

Working Principle

This hydraulic valve distributes pressurized hydraulic fluid from the hydraulic system to different actuators of the Machine. Each spool separately controls movements such as boom lifting, arm telescoping, bucket digging and slewing. The built-in load check valve locks the load firmly to avoid unexpected falling when the control lever returns to neutral. The optional load-sensing structure automatically adjusts flow supply according to actual load demand, reducing energy loss and heat generation of the hydraulic system.

Core Advantages

1. Heavy-duty high-flow structure: large flow capacity to meet continuous high-load operation of excavators and cranes.

2. Modular sectional design: easy to add or remove valve sections, simple maintenance and spare parts replacement.

3. Precision machined spool: low internal leakage, smooth compound action with little impact, suitable for frequent working cycles.

4. Strong dirt resistance: high-strength cast valve body, stable performance under dusty construction sites and harsh outdoor environments.

5. Integrated safety protection: built-in relief and anti-cavitation valves protect the hydraulic system and machine parts from overload and pressure impact.

Application Range

Suitable for medium and large excavators, truck-mounted cranes, mobile cranes, material handlers, forestry machinery and other heavy-duty mobile Machine. Widely applied in construction, quarrying, waste handling and heavy lifting industries.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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Main Product: hydraulic motor, gear box , hydraulic pump, hydraulic valve , hydraulic winch, hydraulic system

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