3/8"-3/8" Manşon

Technical Features & Specifications

Swivel joints are typically made of forged metals and incorporate ball bearings and seals. Common specifications include:

Types of Swivel Joints

Swivel joints are classified by seal configuration and flow geometry:

• O‑Ring Swivel Joints – Use an O‑ring as the pressure seal; compact design offers low torque and smooth rotationV‑Ring Swivel Joints – Use triple V‑ring packing; designed for severe applications and higher moment loads; seals adjust over time for longer life

• Split‑Flange Swivel Joints – Feature a separate bearing pack and an H‑ring with two O‑rings; easier to service with load capacity comparable to V‑ring types

• Straight‑Through, Right‑Angle & Offset – Defined by the geometry of the flow path; straight‑through models keep flow coaxial, right‑angle models redirect flow 90°, and offset designs combine a straight section with an elbow

• In‑Line & Elbow – In‑line joints rotate along a straight axis, preventing hose twisting; elbow joints incorporate a 90° bend for applications requiring directional change and rotation

• Rotary & High‑Pressure – Rotary joints are engineered for continuous 360° rotation and incorporate multiple bearings and seals; high‑pressure joints use robust materials and sealing systems to handle extreme pressures in hydraulic and drilling applications

Materials and Seals

Material selection depends on fluid type, pressure, temperature and corrosion resistance. Carbon steel is widely used for general applications; stainless steel is preferred for corrosive or high‑purity environments; aluminum offers weight savings; brass suits low‑pressure or special media. Seal materials include Viton, PTFE and nitrile to match chemical and temperature requirements. Ball bearing races may be lubricated with grease and can be prepared for submerged service or food applications.

How Swivel Joints Work

A swivel joint generally consists of an inner and outer race with a bearing system that facilitates rotation. Bearings minimize friction and ensure smooth rotation; seals maintain a leak‑free barrier. The design allows 360‑degree rotation or limited angular movement, protecting hoses and pipes from twisting and bending forces.

Application Areas

Swivel joints are critical in industries where hoses or pipes must move freely while conveying fluids. Applications include:

• Loading & unloading terminals for petroleum and petrochemical products.

• Transport trucks carrying fuel or liquids.

• Process plants (refining, mining, distilling, paint manufacturing, food & beverage processing).

• Irrigation and fertilizing systems, where rotating couplings prevent hose fatigue.

• Marine terminals and steel mills, where large‑diameter swivels enable loading or bunkering operations.

• Loading arms for road, rail and marine transfer; Emco Wheaton swivel joints provide 360° rotation across all planes and relieve pipeline stress.

Selection and Installation Tips

1. Determine the flow geometry – choose straight‑through, right‑angle or offset configuration based on routing needs.

2. Match materials to the medium – select carbon steel, stainless steel, brass or aluminum and ensure seal compatibility with the fluid.

3. Choose the appropriate seal design – O‑ring for low torque and compact design, V‑ring for heavy loads, split‑flange for serviceability.

4. Consider operating conditions – verify size, pressure, temperature range and torque drag requirements.

5. Use proper lubrication and maintenance – regularly inspect bearings and seals; replace when worn; maintain lubricant to reduce friction and wear

6. Combine swivel joints for multi‑axis movement – connecting multiple joints in different orientations provides freedom across several planes

Maintenance Guidelines

• Regular inspections – check bearings and seals for wear or damage.

• Lubrication – use appropriate grease or lubricants to minimize friction and protect bearings

• Seal replacement – periodically replace O‑rings or V‑rings to prevent leaks.

• Environmental considerations – choose seals and materials that meet environmental regulations; some models feature stainless steel‑plated sealing surfaces for improved leak protection