HAWE multi-way valve accessories
3 week ago
Product details
I. Types and Functions of Core Accessories
1. Control Valve Slices
• Three-way Flow Control Valve (Exclusive to PSL Models):
Composed of a relief valve and a throttle valve in parallel, it maintains a constant pressure differential across the throttle orifice to achieve stable flow control independent of load. For example, PSL-type multi-way valves use three-way valves to feed back load pressure and regulate system flow, preventing excess flow from returning to the tank and improving energy efficiency.
• Two-way Flow Valve:
Consists of a pressure-reducing valve and a throttle valve in series, balancing pressure between multiple valve slices to ensure synchronized operation of multiple actuators (e.g., cylinders, motors). For instance, in the second slice of a multi-way valve, a two-way valve provides adaptive pressure compensation for the load.
2. Safety and Protection Components
• Main Relief Valve:
Sets the maximum system pressure to prevent overload damage. The main relief valve pressure must exceed that of the secondary pressure-limiting valve to avoid frequent溢流 (overflow, translated as "relief") and excessive oil temperature rise.
• Secondary Pressure-Limiting Valve:
Sets an independent pressure limit for individual actuators (e.g., ports A/B) to ensure safe local operation.
3. Solenoid Valves and Coils
• Solenoid Directional Control Valves:
Use electromagnetic coils to energize/de-energize and control spool valve positions, enabling liquid flow direction switching. For example, PSV-type multi-way valves directly feed back load pressure to variable displacement pumps, requiring solenoid valves to adjust pump displacement.
• Proportional Pressure-Reducing Valves:
Provide stable internal control oil pressure for electro-proportional valves, driving valve spools for precise flow proportional regulation.
4. Throttling and Damping Components
• Check Throttle Valves (e.g., EB 4 Type):
Control liquid flow speed in one direction, commonly used for cushioning or shock absorption.
• Additional Damping Orifices (Optional for PSV Models):
Added to the LS oil circuit to optimize system dynamic response and reduce pressure fluctuations.
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II. Accessory Combinations and Application Scenarios
1. PSL-Type Multi-Way Valves (Fixed Displacement Pump Systems)
• Structural Features:
Built-in three-way flow control valves use shuttle valves to select the highest load pressure and feed it back to the three-way valve, regulating system flow.
• Applications:
Suitable for equipment requiring synchronized control of multiple actuators, such as cranes and concrete pump trucks. For example, the PSL5/160-5 model achieves stable flow distribution for boom movements via three-way valves.
2. PSV-Type Multi-Way Valves (Variable Displacement Pump Systems)
• Structural Features:
Directly feed back load pressure to variable displacement pumps, which adjust displacement based on demand to minimize energy loss.
• Applications:
Ideal for energy-efficient equipment like excavators and die-casting machines. For instance, the PSV61/300-5 model reduces system heating by matching pump displacement to load via load feedback.
3. Modular Combinations
• Base and Add-on Slices:
Users can customize solutions by combining different valve slices (e.g., inlet flow regulators, check valves, brake valves) based on functional requirements. For example, the PSV552/270-3 model achieves complex hydraulic control by串联 (series connection, translated as "stringing together") multiple spool valves.
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III. Technical Parameters and Performance Advantages
1. Pressure and Flow Ranges
• Maximum Working Pressure: Up to 420 bar, suitable for high-pressure hydraulic systems.
• Maximum Flow per Slice: 380 L/min, meeting high-flow actuator demands.
2. Structure and Materials
• All-Steel Construction:
No cast or aluminum components under pressure load, ensuring high-pressure resistance and impact durability for extended service life.
• Compact Design:
Small footprint saves installation space, facilitating integration into compact equipment.
3. Energy Efficiency
• Load-Sensing Technology:
System flow remains stable regardless of load, ensuring consistent actuator speed and reducing energy waste.
• Non-Saturating Control (PSV Models):
Precisely matches pump displacement to load demand, avoiding over- or under-supply for improved system efficiency.
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