hydraulic valve manifold block
2 month ago
Product details
I. Core Functions
1. Integrated Control
Combines multiple hydraulic valves (e.g., directional valves, pressure valves, flow valves) into a single block, reducing piping connections and simplifying system structure.
2. Optimized Oil Circuit
Forms oil passages through internal drilling to distribute, direct, and control hydraulic fluid pressure, minimizing leakage risks.
3. Space Efficiency
Compact design reduces footprint, ideal for space-constrained applications (e.g., construction machinery, automation equipment).
4. Enhanced Reliability
Fewer pipe fittings reduce vibration and impact on the system, extending service life.
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II. Structural Components
1. Manifold Block Body
• Material: Commonly aluminum alloy (lightweight, corrosion-resistant) or forged steel (for high-pressure applications).
• Shape: Typically rectangular, with mounting holes, oil ports, and screw holes distributed on its surface.
• Passage Design: Includes oil passages, process holes (for machining/cleaning), and common oil ports (e.g., P, T, A, B).
2. Hydraulic Valves
• Types: Standard components such as plate valves, cartridge valves, and stacked valves, secured to the block via screws.
• Functions: Control hydraulic fluid flow direction, pressure, and flow rate to actuate components (e.g., hydraulic cylinders, motors).
3. Fittings & Accessories
• Connectors: Link external pipelines via threaded or flange connections.
• Accessories: Include seals, plugs (to seal process holes), and pressure test ports (for monitoring).
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III. Design Considerations
1. Material Selection
• Low-pressure systems (<6.3 MPa): Cast iron (HT20-40) for cost-effectiveness and ease of casting.
• Medium-pressure systems (6.3–21 MPa): Aluminum alloy forgings or 20# forged steel for good weldability.
• High-pressure systems (≥21 MPa): 35# forged steel, heat-treated (HB200-240).
2. Passage Design
• Wall Thickness: Minimum 5 mm between holes to prevent high-pressure puncture.
• Hole Depth: Generally ≤25× hole diameter; longer holes require segmented machining.
• Eccentricity: Ratio of eccentric distance to hole diameter <0.3 to minimize local resistance.
3. Layout Optimization
• Component Placement:
• Frequently adjusted valves (e.g., relief valves, throttle valves) mounted on sides or top.
• Directional valves placed on top; less-adjusted valves (e.g., check valves) on less accessible faces.
• Port Positions:
• Main ports use flange connections; small ports (≤25 mm) use threaded connections.
• Port spacing must accommodate installation of fittings and wrench operation.
4. Sealing & Testing
• Sealing: Process holes sealed with plugs or ball-expanding plugs to ensure leak-free operation.
• Test Ports: Main and pilot circuits equipped with pressure test ports for troubleshooting.
5. Identification & Mounting
• Port Markings: All external and test ports labeled to match schematic diagrams.
• Mounting: Bottom-mounted bolts (through-holes for small blocks, blind holes for large ones); 4–6 bolts depending on block size.
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IV. Applications
1. Construction Machinery: Hydraulic systems in excavators, cranes, and loaders.
2. Industrial Automation: Hydraulic control units for CNC machines, injection molding machines, and die-casting machines.
3. Energy Sector: Hydraulic drives in wind turbines and oilfield equipment.
4. Aerospace: Hydraulic controls for aircraft landing gear and missile launch systems.
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V. Key Advantages
• High Efficiency: Reduced piping lowers leakage risks and improves system response.
• Compact Design: Saves installation space and simplifies maintenance/upgrades.
• Standardization: Supports modular combinations for diverse operating conditions.
• Cost Optimization: Lower material and machining costs with improved production efficiency.
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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4 year
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