Simple, compact and heavy duty designed 3 sections monoblock valves for open centre hydraulic systems.
Fitted with a main pressure relief valve.
Each spool has independent load check valveSeries circuit.
Optional carry--over port..
Available manual, electro--hydraulic and remote with flexible cables spool control kits.
SDM141 Series Monoblock Directional Control Valve
1. Product Overview
TheSDM141 Series Monoblock Directional Control Valveis a high-performance, single-block hydraulic valve designed for precise flow and pressure control in industrial and mobile hydraulic systems. It integrates directional control, pressure relief, and flow regulation functions into a compact unit, offering improved efficiency, reliability, and ease of installation. This valve is widely used in applications such as construction machinery, agricultural equipment, material handling systems, and industrial automation.
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2. Key Features and Technical Advantages
2.1. Compact and Modular Design
• Single-Block Structure: Reduces piping complexity, installation time, and potential leakage points.
• Scalable Configuration: Allows customization with additional functions (e.g., flow control, check valves) via stackable modules.
2.2. Precision Control and Performance
• High-Flow Capacity: Supports rated flows up to200 L/min(depending on spool type).
• Adjustable Spool Functions:
• O-Type (Closed Center): Blocks all ports in neutral position.
• P-Type (Pressure Relief): Directs excess pressure to tank.
• Y-Type (Parallel Circuit): Allows simultaneous operation of multiple actuators.
• Multiple Actuation Methods:
• Manual lever (spring return or detent)
• Solenoid-operated (12V/24V DC or 110V/220V AC)
• Hydraulic pilot (remote control)
• Pneumatic or cable control (optional)
2.3. Durability and Robust Construction
• High-Strength Materials:
• Cast iron valve body for impact resistance.
• Hardened spool and sleeve for extended wear life.
• Advanced Sealing Technology:
• Low-friction, high-temperature-resistant seals (NBR, FKM, or PTFE).
• Anti-extrusion rings to prevent seal failure under high pressure.
2.4. Safety and Protection Features
• Integrated Pressure Relief: Prevents system overpressure.
• Anti-Cavitation Design: Reduces noise and valve wear in high-pressure drop applications.
• Corrosion Resistance: Optional zinc-nickel plating or epoxy coating for harsh environments.
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3. Technical Specifications
【表格】
Parameter Specification
Maximum Working Pressure 350 bar (standard) / 400 bar (high-pressure models)
Rated Flow Rate 30–200 L/min (varies by spool and port size)
Port Sizes G1/2 to G1 1/2 (BSPP/NPT optional)
Spool Options O, P, Y, A/B-block, tandem, float center
Actuation Modes Manual, solenoid, hydraulic pilot, pneumatic
Temperature Range -20°C to +80°C (standard) / -40°C to +120°C (optional)
Protection Class IP65 (dustproof and water-resistant)
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4. Applications
• Construction Machinery:
• Excavators, loaders, bulldozers, and concrete pumps.
• Agricultural Equipment:
• Tractors, harvesters, sprayers, and seeders.
• Industrial Machinery:
• Presses, injection molding machines, and hydraulic presses.
• Material Handling:
• Forklifts, cranes, and conveyor systems.
• Specialized Vehicles:
• Fire trucks, aerial work platforms, and mining equipment.
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5. Advantages Over Competitors
1. Cost-Effectiveness:
• Reduces system complexity by integrating multiple functions into one valve.
• Lower maintenance costs due to durable construction and advanced sealing.
2. Flexibility:
• Supports custom spool configurations and actuation methods.
• Compatible with a wide range of hydraulic fluids (mineral oil, biodegradable oils, HFA/HFB).
3. Reliability:
• Proven performance in high-pressure and high-flow applications.
• Long service life with minimal downtime.
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6. Selection and Installation Guide
6.1. Selection Criteria
• Load Requirements:
• For dynamic loads (e.g., excavator arms), choose a high-flow, quick-response valve.
• For static loads (e.g., clamping), a lower-flow, precise-control valve may suffice.
• Actuation Method:
• Manual for simple, infrequent operations.
• Solenoid for automated or remote control.
• Hydraulic pilot for high-pressure or heavy-duty applications.
• Environmental Conditions:
• For extreme temperatures or corrosive environments, select specialized coatings or materials.
6.2. Installation Tips
• Orientation: Install horizontally to prevent air traps and ensure proper valve operation.
• Piping: Use high-quality, flexible hoses to minimize vibration and stress on the valve.
• Filtration: Maintain hydraulic oil cleanliness (NAS 7 or higher) to prevent spool sticking or seal damage.
