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SD4 Series
Blince
The Walvoil SD4 Series 45 L/min Hydraulic Directional Control Valve is a high-performance solution designed for precise fluid control in industrial hydraulic systems, ideal for machinery requiring rapid response and reliable operation. Engineered with a compact design and high-flow capacity, this valve ensures smooth directional control of hydraulic actuators, making it essential for applications ranging from construction equipment to manufacturing machinery.
High Flow Capacity:
45 L/min rated flow (ISO 4402 port size), supporting rapid cylinder movement in high-demand systems, with pressure ratings up to 350 bar (5075 PSI) for heavy-duty applications.
Spool-type design with low pressure drop (≤1.5 bar at rated flow), minimizing energy loss and heat generation in continuous operation.
Precision Control:
Manual, electric, or pneumatic actuation options, with optional position feedback sensor (±0.5% accuracy) for closed-loop control systems.
Adjustable flow and pressure compensators (flow control range: 5-45 L/min), enabling fine-tuning for specific actuator speeds and forces.
Durable Construction:
Anodized aluminum alloy body (ISO 7599) and nitrided steel spools, resisting corrosion (salt spray test: 500 hours) and wear (1 million cycle life).
IP65-rated enclosure for solenoid coils, protecting against dust and water jets in harsh industrial environments.
System Compatibility:
Compatible with mineral oils, synthetic fluids, and water-glycol emulsions (viscosity range: 10-400 cSt), meeting ISO 11158 hydraulic fluid standards.
Mounting options: subplate (ISO 4401) or inline, with quick-connect fittings reducing installation time by 30%.
Ideal for industrial hydraulic systems, the SD4 Series excels in:
Construction Machinery: Controls boom and bucket movements in excavators, loaders, and cranes, ensuring smooth operation under variable loads.
Plastic Injection Molding: Directs hydraulic flow to mold clamping units and ejector systems, supporting high-speed cycle times (≤5 seconds) in packaging and automotive component production.
Material Handling Equipment: Powers pallet jacks, stackers, and conveyor belts, with fail-safe neutral position for safety during load positioning.
Agricultural Machinery: Manages hydraulic implements (plows, harvesters), with weather-resistant coatings for outdoor use (UV exposure: 1000 hours).
Q: Can this valve be used with water-based fluids?
A: Yes, compatible with water-glycol fluids (max 40% water content), but regular flushing is recommended to prevent corrosion.
Q: What is the response time for electric actuation?
A: ≤50ms for solenoid activation, ensuring rapid directional changes in high-frequency applications.
Q: Does it support proportional control?
A: Yes, optional proportional solenoids (0-10V/4-20mA input) enable stepless flow regulation for precision motion control.
SD series directional control valve, flow range of 30-400L/min, can meet different flow requirements; Its compact, heavyand simple design, can be used in a variety of work scenarios for open or closed centre hydraulic systems; stable performance, a variety of control methods to choose.
☆ Control type: manual, cable, pneumatic, electro-hydraulic,solenoid, etc.
☆ Circuit type: parallel
☆ Structure:monoblock or sectiona
The Walvoil SD4 Series 45 L/min Hydraulic Directional Control Valve is a high-performance solution designed for precise fluid control in industrial hydraulic systems, ideal for machinery requiring rapid response and reliable operation. Engineered with a compact design and high-flow capacity, this valve ensures smooth directional control of hydraulic actuators, making it essential for applications ranging from construction equipment to manufacturing machinery.
High Flow Capacity:
45 L/min rated flow (ISO 4402 port size), supporting rapid cylinder movement in high-demand systems, with pressure ratings up to 350 bar (5075 PSI) for heavy-duty applications.
Spool-type design with low pressure drop (≤1.5 bar at rated flow), minimizing energy loss and heat generation in continuous operation.
Precision Control:
Manual, electric, or pneumatic actuation options, with optional position feedback sensor (±0.5% accuracy) for closed-loop control systems.
Adjustable flow and pressure compensators (flow control range: 5-45 L/min), enabling fine-tuning for specific actuator speeds and forces.
Durable Construction:
Anodized aluminum alloy body (ISO 7599) and nitrided steel spools, resisting corrosion (salt spray test: 500 hours) and wear (1 million cycle life).
IP65-rated enclosure for solenoid coils, protecting against dust and water jets in harsh industrial environments.
System Compatibility:
Compatible with mineral oils, synthetic fluids, and water-glycol emulsions (viscosity range: 10-400 cSt), meeting ISO 11158 hydraulic fluid standards.
Mounting options: subplate (ISO 4401) or inline, with quick-connect fittings reducing installation time by 30%.
Ideal for industrial hydraulic systems, the SD4 Series excels in:
Construction Machinery: Controls boom and bucket movements in excavators, loaders, and cranes, ensuring smooth operation under variable loads.
Plastic Injection Molding: Directs hydraulic flow to mold clamping units and ejector systems, supporting high-speed cycle times (≤5 seconds) in packaging and automotive component production.
Material Handling Equipment: Powers pallet jacks, stackers, and conveyor belts, with fail-safe neutral position for safety during load positioning.
Agricultural Machinery: Manages hydraulic implements (plows, harvesters), with weather-resistant coatings for outdoor use (UV exposure: 1000 hours).
Q: Can this valve be used with water-based fluids?
A: Yes, compatible with water-glycol fluids (max 40% water content), but regular flushing is recommended to prevent corrosion.
Q: What is the response time for electric actuation?
A: ≤50ms for solenoid activation, ensuring rapid directional changes in high-frequency applications.
Q: Does it support proportional control?
A: Yes, optional proportional solenoids (0-10V/4-20mA input) enable stepless flow regulation for precision motion control.
SD series directional control valve, flow range of 30-400L/min, can meet different flow requirements; Its compact, heavyand simple design, can be used in a variety of work scenarios for open or closed centre hydraulic systems; stable performance, a variety of control methods to choose.
☆ Control type: manual, cable, pneumatic, electro-hydraulic,solenoid, etc.
☆ Circuit type: parallel
☆ Structure:monoblock or sectiona
