Water rotary union YZ series

for oilfor chemicalsfor gas

Short Description

• YZ-DD & YZ-DC 90° stainless steel hydraulic swivel joint
• Angle: 360° free rotation
• Connection type: Threaded connection (dual-end NPT/BSPP thread)
• Applicable hose: Threaded hose
• Pipe size: Customized
• Operating fluid: Water, coolant, compressed air, hydraulic oil, gas
• Working pressure: 25 MPa (series rating up to 25 MPa; typical continuous max 20.5 MPa depending on model)
• Applicable temperature: -200°C to 120°C

Product Description
The YZ-DD and YZ-DC series swivel joints are engineered for high-pressure, low-frequency rotation and swinging applications. Manufactured entirely from high-grade stainless steel, these compact swivel fittings provide excellent corrosion resistance and long service life in aggressive environments. Larger sizes incorporate oil-free composite bearings to deliver smooth low-speed rotation with reduced maintenance. The design is suitable for normal-temperature hydraulic oil circuits and for many demanding media; series ratings reach up to 25 MPa with typical continuous operating limits around 20.5 MPa, depending on the selected model.

Key Features

• Stainless steel construction for corrosion resistance in industrial environments
• Oil-free composite bearings in large sizes for maintenance-free low-speed operation
• Compact, space-saving design for tight installation envelopes
• Direct replacement compatibility with Frishton rotary joints to minimize retrofit time
• Designed for extreme conditions: ultra-low temperatures, high pressure and aggressive media

Technical Specifications

• Model series: YZ-DD & YZ-DC
• Series rating: up to 25 MPa; typical continuous max: 20.5 MPa (model dependent)
• Working pressure (short description reference): 25 MPa
• Operating temperature: -200°C to 120°C
• Speed range: 0–30 rpm (low-speed rotation/swing)
• Body material: Stainless steel
• Bearing type: Oil-free composite bearings (for large sizes)

Application Media

• Hydraulic oil (normal temperature)
• Hot water and high-temperature/high-pressure steam
• Heat exchange fluids
• Nitrogen and cryogenic liquids
• Organic solvents and hydrocarbons

Applications
Ideal for hydraulic systems requiring low-frequency rotation such as excavator booms, crane winches, industrial hose reels and other machinery that require 360° swiveling under pressure.

Commercial / Technical Details

• Trade name / series: YZ-DD & YZ-DC
• Angular rotation: 360° free rotation
• Connection type: Threaded connection (dual-end NPT/BSPP thread)
• Applicable hose: Threaded hose; pipe size: customized
• Compatible fluids: water, coolant, compressed air, hydraulic oil, gas, hot water, steam, heat transfer fluids, nitrogen, cryogenic liquids, organic solvents, hydrocarbons
• Rated pressure: series up to 25 MPa; typical continuous max 20.5 MPa
• Temperature range: -200°C to 120°C
• Speed: 0–30 rpm (low-speed)
• Body material: Stainless steel
• Bearing type: Oil-free composite bearings (for large sizes)