Flange (87311 / 87611 / 87911)
Three mainstream flange series: 87311, 87611, 87911, covering low, medium and ultra-high pressure working conditions for heavy hydraulic systems.
Pressure Rating
- 87311: Standard 3000PSI flange coupling
- 87611: Medium-high 6000PSI flange coupling
- 87911: Heavy-duty 9000PSI ultra-high pressure flange couplingFlange Standard
All three models adopt SAE standard flange connection structure, replacing traditional thread connection. Flange locking evenly distributes pressure load, effectively preventing joint loosening caused by long-term equipment vibration.
Thread Standard
Supports UN/UNF inch straight threads and metric M-series threads, perfectly compatible with various hydraulic hose assemblies. Custom thread specifications are available upon request.
Sealing Principle
Double-sided built-in spring valve structure for all series. When two halves connect, internal valves open mutually to form a full unobstructed fluid passage; upon separation, both valves instantly close tightly to lock hydraulic liquid inside hoses. Zero medium leakage without extra auxiliary sealing accessories, greatly reducing oil waste and pollution.
Applicable Scenarios
- Heavy hydraulic machinery, mining equipment, hydraulic presses
- Engineering vehicles: excavators, loaders, road rollers, heavy lifting machines
- Large agricultural tractors and hydraulic harvesting equipment
- High-pressure oil pipelines requiring frequent disassembly & connection
- Complete sets of hydraulic circulation systems from low to ultra-high pressure
Selection Tips
1. 87311 (3000PSI): Ideal for medium-low pressure general hydraulic circulation systems with frequent assembly demands.
2. 87611 (6000PSI): Fits medium-high pressure construction machinery and standard industrial hydraulic stations.
3. 87911 (9000PSI): Designed for ultra-high pressure heavy-load equipment, mining hydraulic tools and high-impact hydraulic systems.
