Water rotary union

for sludgefor pipeshigh-pressure

Overview
DSTI swivel joints provide 360° rotation to maximize flexibility of discharge pipeline flow in hydraulic dredging and marine excavation. Designed for abrasive media such as slurry, mud, sand, gravel and rock, they are engineered to meet the specifications of leading dredging contractors. Typical pressure rating up to 500 PSI (35 BAR) and internal pipe diameters from 300 to 1100 mm (12–43 in). Redundant sealing and a serviceable design reduce maintenance downtime.

Applications

• Trailing Suction Hopper Dredger
• Hydraulic Dredger
• Cutter Suction Dredger
• Suction Dredger
• Water Injection Dredger

Technical specifications (high level)

• Discharge pressures up to 500+ PSI (35+ BAR)
• Specialized seals allow external seal recharging without disassembly
• Internal pipe-size diameters typically 300–1100 mm (12–43 in)
• Flow passage diameter up to 900+ mm (36+ in) in larger configurations
• Designed for direct integration into existing dredging equipment

Additional features

• Redundant sealing system for extended service life
• High-precision manufacturing for consistent performance
• Alloy steel construction with welded alignment pin for secure mounting
• Heavy-duty integrated bearings for smooth rotation under load

Technical characteristics

• Rotation: 360° swivel for flexible discharge pipeline routing
• Media: Suitable for abrasive media — slurry, mud, sand, gravel, rock
• Pressure rating: typically up to 500 PSI (35 BAR)
• Internal diameters: 300–1100 mm (12–43 in)
• Flow passage: up to 900+ mm (36+ in)
• Sealing: redundant seals with external recharge capability
• Construction: alloy steel with welded alignment pin
• Mechanical: integrated heavy-duty bearings
• Serviceability: serviceable without full disassembly to minimize downtime
• Integration: designed for direct integration into dredging and marine excavation equipment