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Large Rotors Support

HSJ - Swing Joints

Heavy-duty and built to last in any irrigation system, HSJs are available in a multitude of the inlet, outlet, size, and length configurations with one perfect for every preference. Pair them one-for-one with any Hunter golf rotor purchase, and golf rotor warranties are extended from three to five years. These swing joints work extremely well with our commercial line of I-Series rotors as well.  The following topics are discussed in the article below:

  • Flexibility
  • Proper Sealing
  • Installation
  • Pressure Loss
  • Configuration
Flexibility

The swing joint provides 360° movement in all fittings to allow the correct installation height and vertical positioning of the rotor. These have O-ring threaded joints pre-assembled from the factory. The joints are pre-lubricated and should not be disassembled prior to installation.

Sealing

For correct operation, the sealing is key for top performance. There should be about one or two threads showing, leaving about 4-5 threads engaged inside. The O-ring would be in the middle of the thread sealing area. From this point, the swing joint can be raised, lowered, or moved side-to-side very easily. After initial installation, heads can be raised, reset, then repacked at the correct height. 

Installation

To properly use these swivels, we highly recommend the following prior to installation:

  1. Gently tighten each O-ring swivel joint by threading clockwise until it bottoms out and can no longer turn.
  2. Next, turn out the male threaded part one full turn counter-clockwise to allow the joint to swivel a full 360° later. The fitting will appear loose as the seal is created by the internal ORING.
  3. Install HSJ elbow to lateral pipe tee perpendicular as see in figure #7. If aligned incorrectly, the swing joint will not lower properly.
  4. It is recommended to install in a 30° to 45° orientation to the lateral.  This will help with absorbing heavy equipment on the top outlet.

IMPORTANT: It is not recommended disassembling any of the joints in the field as the O-ring may get dirty creating a bad seal.

Pressure Loss

The charts below indicate the pressure lost in all configurations of the HSJ swing joints.

Configuration

The HSJ swing joint can be ordered in many different configurations including Model, Inlet Type, Outlet Type, Outlet Style, and Lay Length. Please reference the link here for more details.

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