Plunger Packing Installation

Pump plunger packing is critical to assuring adequate downstream pressure of your system. Triangle Pump Components is proud to supply 838 style packing for general service applications. We offer die-formed and spring-loaded packing for extreme or high temperature conditions, made from the highest grade braided PTFE, Kevlar®, and graphite.

To ensure the safe, proper installation of your pump packing, follow these steps:

  • Before beginning the installation, familiarize yourself with all federal and state safety and environmental regulations.
  • As a safety precaution, make sure that the pump’s power source is completely turned off, locked out, and tagged before starting.
  • Remove the old plunger and packing from the stuffing box and thoroughly clean and inspect the box as well as the sealing surfaces. Do not leave any old packing remnants.
  • Install new packing per the manufacturer’s instructions, making sure to inspect and replace any worn throat bushings, lantern rings, or junk rings as necessary.
  • Visually check the plunger for worn areas and damage, replacing them as necessary.
  • Install the new packing, ensuring that the seal rings are facing the pressure end of the pump.
  • Lubricate the plunger and insert into packing. Be careful not to damage the plunger’s exterior surface during installation.
  • Connect the new plunger to the extension rod or crosshead. Turn the pump over by hand to make sure the plunger and packing are properly aligned.
  • Tighten the packing per the pump manufacturer’s instructions. If you are installing adjustable style packing, do not tighten it until the dripping stops as this could inflict damage from overtightening.
  • Start the pump and check its operation for leaks. However, it’s normal for the packing to drip small amounts of fluid.
  • Note that the majority of situations involving excessive leakage are due to improper installation. Please be thoroughly familiar with manufacturer’s pump maintenance instructions before starting any installation.

If you have any questions about proper plunger installation, please contact us.

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