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HSJ - Swing Joints

Heavy-duty Hunter Swing Joints (HSJ) are available in a range of inlet, outlet, size, and length configurations for any irrigation system. Pair them one-for-one with any Hunter golf rotor purchase to extend the golf rotor warranty from three to five years. HSJs are an ideal complement to commercial I-Series rotors as well.  The following topics are discussed in the article below:

Flexibility

 

Every HSJ provides full 360° movement to allow for correct rotor installation height and vertical positioning. Each swing joint includes an O-ring pre-assembled at the factory. The joints are pre-lubricated and should not be disassembled prior to installation.

 

Sealing

Proper sealing is key for correct operation and top performance. During installation, leave one or two threads visible, with four to five threads engaged inside. The O-ring should be located in the middle of the thread sealing area. From this point, the HSJ can be easily raised, lowered, or moved side-to-side. Raise, reset, or repack heads at the correct height as needed after initial installation. 

Installation

To properly use the HSJ swivels, perform the following steps 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 counterclockwise. This allows the joint to swivel a full 360°. The fitting will appear loose, as the seal is created by the internal O-ring.
  3. Install the HSJ elbow to lateral pipe tee perpendicular as seen in Figure 7. If aligned incorrectly, the HSJ will not lower properly.
  4. Ensure a 30° to 45° orientation to the lateral.  This will help with absorbing heavy equipment on the top outlet.

IMPORTANT: Do not disassemble any HSJ in the field. The O-ring may get dirty or damaged, which will create 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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