1. Brand Correspondence & Product Positioning
【表格】
Brand Name Full English Name Industry Sector Foot Pedal Valve Characteristics
SK神钢 SK Steel / KOBELCO Steel/Construction Machinery (Kobelco Group) High-pressure hydraulic valves for construction equipment attachments
力士乐 Bosch Rexroth Hydraulics & Automation Precision pneumatic/hydraulic valves with modular design
大宇 Daewoo / Doosan Construction Machinery (Former Daewoo, now Doosan) Cost-effective valves for light-duty equipment
川崎 Kawasaki Heavy Industry & Hydraulics High-reliability valves for marine and industrial applications
2. Product Classification & Technical Specifications
By Control Type
【表格】
Type English Name Technical Features
Hydraulic Foot Valve Hydraulic Foot Pedal Valve High-pressure resistant (≥350 bar), used in excavators, die-casting machines
Pneumatic Foot Valve Pneumatic Foot Pedal Valve Lightweight, fast response, for automation lines and medical devices (e.g., surgical table adjustment)
Electro-Hydraulic Valve Electro-Hydraulic Foot Valve Combines foot and electromagnetic control for remote/local dual-mode operation (common in Bosch Rexroth advanced models)
Key Technical Parameters (Example)
【表格】
Parameter Typical Value Explanation
Port Size 1/4" ~ 1" (DN6 ~ DN25) Determines flow rate; construction machinery often uses ≥1/2" (DN15)
Working Pressure Hydraulic: 350 bar; Pneumatic: 10 bar Must match system pressure; overpressure may cause seal failure
Response Time ≤50 ms (hydraulic); ≤20 ms (pneumatic) Critical for operational precision
Protection Grade IP65/IP67 Dust/waterproof for harsh environments (e.g., construction sites)
Temperature Range -40°C ~ +80°C Special seals required for extreme cold/heat
3. Typical Applications
Construction Machinery
• Excavators/Loaders: Control hydraulic attachments (e.g., breakers, clamps) via foot valves.
• Die-Casting Machines: Foot-operated mold closing and injection.
• Aerial Work Platforms: Fine-tune elevation speed.
Industrial Automation
• Presses/Shears: Foot-activated emergency stop or single-cycle operation.
• Assembly Lines: Pneumatic foot valves control cylinder clamping/releasing.
Specialized Industries
• Marine Deck Machinery: Kawasaki valves for anchor winches (salt spray resistance required).
• Medical Devices: Bosch Rexroth pneumatic valves for surgical table height adjustment (ISO 13485 certified).
4. Selection Guide
Core Considerations
1. Control Type Matching:
• Hydraulic systems require hydraulic foot valves; pneumatic systems need pneumatic valves.
• For electro-hydraulic integration, choose Bosch Rexroth models.
2. Pressure & Flow Requirements:
• Heavy machinery prioritizes high-pressure, large-flow models (e.g., KOBELCO 1" port).
• Light-duty equipment may use cost-effective Daewoo/Doosan valves.
3. Environmental Adaptability:
• Marine environments demand Kawasaki stainless steel valves (NACE MR0175 certified).
• Extreme cold requires low-temperature startup capability (e.g., Bosch Rexroth -40°C models).
4. Safety & Certifications:
• EU markets require CE certification; medical devices need FDA/ISO 13485.
• Explosion-proof scenarios use ATEX-certified valves (common in petrochemicals).
5. Common Issues & Solutions
【表格】
Issue Possible Causes Solutions
Valve Leakage Seal degradation/oil contamination Replace seals; filter or replace hydraulic oil
Slow Response Spring fatigue/airway blockage Replace springs; clean pneumatic filters
False Actuation Electromagnetic interference/mechanical jamming Add shielding; disassemble and clean valve spools
Cold Startup Failure High oil viscosity/seal hardening Use low-temperature hydraulic oil (e.g., ISO VG32); switch to cold-resistant seals
6. Brand Comparison & Recommendations
【表格】
Brand Strengths Recommended Model
KOBELCO Superior high-pressure performance for heavy machinery KOBELCO HFP-25 Series (350 bar)
Bosch Rexroth Modular design, electro-hydraulic integration, full medical/industrial certifications Rexroth DBETE-5X Electro-Hydraulic Foot Valve
Daewoo/Doosan Low cost, simple maintenance for light-duty equipment Doosan DFP-10 Economic Pneumatic Foot Valve
Kawasaki
Exceptional corrosion resistance for marine applications
Kawasaki KFP-20 Stainless Steel Hydraulic Valve
