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The SD8-2 Directional Control Valve is a core component designed for modern hydraulic systems, engineered to precisely regulate the direction, on-off, and flow of hydraulic fluid. As a premium hydraulic directional valve, it integrates advanced structural design and robust materials to meet the rigorous demands of industrial automation and mobile machinery. This valve features a compact structure that saves installation space while supporting two hydraulic system options—open center and closed center—to adapt to diverse circuit configurations. With versatile control modes and reliable performance, the SD8-2 serves as a critical link in optimizing hydraulic system efficiency and operational accuracy.
Crafted with a high-hardness ductile iron valve body and 60HRC+ hardened valve core, the SD8-2 delivers outstanding high-pressure resistance up to 350bar. This feature ensures stable operation in harsh high-pressure environments, minimizing leakage and extending service life even under long-term high-frequency use.
Adopting CNC precision machining technology, the valve achieves precision flow control with a repeatability of ±1%. Its optimized internal flow channel design reduces pressure loss, ensuring smooth fluid circulation and precise response to control signals, which is essential for automated production processes.
The SD8-2 supports diverse control methods including manual, solenoid, electro-hydraulic, and remote control. This flexibility allows seamless integration into various systems, from simple manual operations to complex automated workflows, enhancing system compatibility and operational convenience.
With strong anti-pollution capability, the valve resists clogging and wear caused by impure hydraulic fluid. The modular coil design enables easy replacement without disassembling the entire valve, reducing maintenance time and costs. Additionally, its mute operation meets environmental requirements for low-noise workplaces.
By minimizing internal leakage and pressure drop, the SD8-2 improves hydraulic system energy efficiency. It reduces unnecessary power consumption, making it an eco-friendly choice for energy-conscious applications while maintaining top-tier performance.
Parameter | Specification |
Model | SD8-2 Directional Control Valve |
Maximum Working Pressure | 350 bar (5075 psi) |
Maximum Flow Rate | 60 L/min (15.85 US gal/min) |
Control Modes | Manual, Solenoid, Electro-hydraulic, Pneumatic, Remote Control |
Valve Body Material | Ductile Iron (60HRC+ hardness) |
Valve Core Material | High-hardness alloy steel |
Medium Temperature Range | -20℃ ~ +80℃ (-4℉ ~ 176℉) |
Protection Class | IP65 |
Response Time | ≤ 100 ms (24VDC) |
Compatible Medium | Mineral hydraulic oil, high-water-based emulsion |
Mounting Standard | ISO 4401 |
Ideal for excavators, loaders, and bulldozers, the SD8-2 controls hydraulic cylinders for boom, bucket, and travel movements. Its high-pressure resistance and shock resistance adapt to rugged construction sites.
Widely used in tractors, combine harvesters, and planting equipment, it regulates the lifting of implements and precise flow for seeding/fertilizing systems, enhancing farming efficiency and operational accuracy.
Suitable for injection molding machines, stamping presses, and metallurgical equipment, the valve ensures precise control of mold clamping, injection speed, and roller adjustments, improving product quality and production stability.
In mining trucks and sanitation vehicles, its robust design withstands dusty, high-vibration environments while maintaining reliable fluid control for loading, unloading, and waste handling operations.
Applied in aerial work platforms and fire trucks, it provides safe, precise control for lifting and positioning functions, ensuring operator safety and equipment stability.
It works with mineral hydraulic oil (ISO VG 32-68) and high-water-based emulsion, ensuring compatibility with most standard hydraulic systems.
The mounting surface must meet ISO 4401 standards (Ra ≤ 0.8μm, flatness ≤ 0.01mm/100mm). Avoid direct exposure to heat sources and ensure correct connection of P (pressure), T (tank), A/B (working) ports.
Routine inspection is recommended every 1000 operating hours, including checking for leaks, cleaning filters, and verifying coil connections. Hydraulic oil should be replaced per system requirements to maintain performance.
Its combination of high-pressure resistance, multiple control modes, and compact design sets it apart. The anti-pollution structure and low-maintenance features also reduce downtime compared to conventional valves.
We offer a 12-month warranty covering manufacturing defects. Proper installation, operation, and maintenance as per the manual are required to validate the warranty.
The SD8-2 Directional Control Valve is a core component designed for modern hydraulic systems, engineered to precisely regulate the direction, on-off, and flow of hydraulic fluid. As a premium hydraulic directional valve, it integrates advanced structural design and robust materials to meet the rigorous demands of industrial automation and mobile machinery. This valve features a compact structure that saves installation space while supporting two hydraulic system options—open center and closed center—to adapt to diverse circuit configurations. With versatile control modes and reliable performance, the SD8-2 serves as a critical link in optimizing hydraulic system efficiency and operational accuracy.
Crafted with a high-hardness ductile iron valve body and 60HRC+ hardened valve core, the SD8-2 delivers outstanding high-pressure resistance up to 350bar. This feature ensures stable operation in harsh high-pressure environments, minimizing leakage and extending service life even under long-term high-frequency use.
Adopting CNC precision machining technology, the valve achieves precision flow control with a repeatability of ±1%. Its optimized internal flow channel design reduces pressure loss, ensuring smooth fluid circulation and precise response to control signals, which is essential for automated production processes.
The SD8-2 supports diverse control methods including manual, solenoid, electro-hydraulic, and remote control. This flexibility allows seamless integration into various systems, from simple manual operations to complex automated workflows, enhancing system compatibility and operational convenience.
With strong anti-pollution capability, the valve resists clogging and wear caused by impure hydraulic fluid. The modular coil design enables easy replacement without disassembling the entire valve, reducing maintenance time and costs. Additionally, its mute operation meets environmental requirements for low-noise workplaces.
By minimizing internal leakage and pressure drop, the SD8-2 improves hydraulic system energy efficiency. It reduces unnecessary power consumption, making it an eco-friendly choice for energy-conscious applications while maintaining top-tier performance.
Parameter | Specification |
Model | SD8-2 Directional Control Valve |
Maximum Working Pressure | 350 bar (5075 psi) |
Maximum Flow Rate | 60 L/min (15.85 US gal/min) |
Control Modes | Manual, Solenoid, Electro-hydraulic, Pneumatic, Remote Control |
Valve Body Material | Ductile Iron (60HRC+ hardness) |
Valve Core Material | High-hardness alloy steel |
Medium Temperature Range | -20℃ ~ +80℃ (-4℉ ~ 176℉) |
Protection Class | IP65 |
Response Time | ≤ 100 ms (24VDC) |
Compatible Medium | Mineral hydraulic oil, high-water-based emulsion |
Mounting Standard | ISO 4401 |
Ideal for excavators, loaders, and bulldozers, the SD8-2 controls hydraulic cylinders for boom, bucket, and travel movements. Its high-pressure resistance and shock resistance adapt to rugged construction sites.
Widely used in tractors, combine harvesters, and planting equipment, it regulates the lifting of implements and precise flow for seeding/fertilizing systems, enhancing farming efficiency and operational accuracy.
Suitable for injection molding machines, stamping presses, and metallurgical equipment, the valve ensures precise control of mold clamping, injection speed, and roller adjustments, improving product quality and production stability.
In mining trucks and sanitation vehicles, its robust design withstands dusty, high-vibration environments while maintaining reliable fluid control for loading, unloading, and waste handling operations.
Applied in aerial work platforms and fire trucks, it provides safe, precise control for lifting and positioning functions, ensuring operator safety and equipment stability.
It works with mineral hydraulic oil (ISO VG 32-68) and high-water-based emulsion, ensuring compatibility with most standard hydraulic systems.
The mounting surface must meet ISO 4401 standards (Ra ≤ 0.8μm, flatness ≤ 0.01mm/100mm). Avoid direct exposure to heat sources and ensure correct connection of P (pressure), T (tank), A/B (working) ports.
Routine inspection is recommended every 1000 operating hours, including checking for leaks, cleaning filters, and verifying coil connections. Hydraulic oil should be replaced per system requirements to maintain performance.
Its combination of high-pressure resistance, multiple control modes, and compact design sets it apart. The anti-pollution structure and low-maintenance features also reduce downtime compared to conventional valves.
We offer a 12-month warranty covering manufacturing defects. Proper installation, operation, and maintenance as per the manual are required to validate the warranty.
