Pump Packing

Don’t assume the style of packing you pulled out of the pump should go back in! Let us help you decide the best packing for your pump service.

Want a packing that will last?

Our Ameri-lon packing is a proprietary blend of graphite and PTFE. Compatible with most Chemicals resistant to abrasives.

What is pump packing?

Pump packing is a type of mechanical seal used to prevent leakage from the shaft of a rotating pump. It is typically made of materials such as braided graphite or PTFE (Teflon) and is located between the shaft and the pump housing. The purpose of the packing is to provide a tight seal to prevent liquids or gases from escaping, while also allowing for the rotation of the shaft. Pump packing is often used in industrial and commercial applications such as water and sewage treatment, chemical processing, and oil and gas production.

Is pump packing supposed to leak?

Pump packing is not typically designed to leak, but some leakage may occur. The leakage is usually minimal and is known as “packing leakage.” The amount of leakage is generally considered acceptable as long as it does not cause problems or damage to the equipment or the environment. The target leakage rate to provide enough lubrication for the shaft is 6 drops per minute. Flexible graphite packing may leak less due to the natural lubricating characteristics of graphite.

However, if the leakage rate is excessive, it may indicate that the pump packing needs to be adjusted or replaced. High leakage rates can also be caused by factors such as worn or damaged shafts, improper installation, or a lack of lubrication. In these cases, it may be necessary to replace the pump packing or address the underlying issue to prevent further leakage.

What is packing for centrifugal pumps?

Packing for centrifugal pumps refers to the seals that are used to prevent leakage of fluid from the pump. The packing is typically made of materials such as graphite, PTFE, or other types of synthetic fibers, and is placed around the shaft of the pump to create a barrier between the fluid being pumped and the outside environment. Packing is important for maintaining the efficiency and performance of the pump, and can also help to prevent damage to the surrounding equipment and environment.

When should pump packing be replaced?

Pump packing should be replaced when it becomes worn or damaged. Some signs that pump packing needs to be replaced include leakage around the shaft, an increase in the amount of fluid being lost, or a decrease in the efficiency of the pump. Additionally, if the packing is visibly worn or damaged, it should be replaced.

It’s also good practice to replace the packing when performing a routine maintenance or overhaul of the pump. The frequency of replacement can vary depending on the specific application, but it’s generally recommended to check the packing at least once a year and replace it if necessary.

It’s also worth mentioning that some pumps use mechanical seals instead of packing which has a longer lifespan. But it’s also important to check the conditions of the mechanical seals and replace them if necessary.

Why does pump packing leak?

Pump packing can leak for a variety of reasons. Some common causes of leakage include:

1. Worn or damaged packing: Over time, the packing may become worn or damaged due to friction and exposure to the fluid being pumped, which can lead to leakage.

2. Incorrect installation: If the packing is not properly installed or adjusted, it may not create an effective seal, leading to leakage.

3. Improper tightening of the packing gland: The packing gland is the mechanism used to compress the packing against the shaft, if it’s not tightened correctly it may not create an effective seal and lead to leakage.

4. Misalignment: If the pump and motor are not aligned correctly, the shaft may not be centered in the packing, causing leakage.

5. Incorrect packing selection: Using the wrong type of packing material for the specific application or fluid can also lead to leakage.

6. Overheating: If the temperature inside the pump gets too high it may cause the packing to expand and lose its seal, leading to leakage.

7. Improper shaft finish: The shaft should have a smooth finish to minimize friction and wear on the packing. If the shaft is rough or corroded, it can damage the packing and lead to leakage.

It’s important to regularly check the packing for signs of wear or damage and replace it when necessary to maintain the efficiency and performance of the pump.

Ameri-lon Pump / Valve Packing

  • Compatible with chemicals
  • Naturally Lubricious
  • pH-0-14
  • 300 PSI in a Pump
  • 4000 PSI in a Valve
  • Shaft Speed to 4500 FPM
  • Temp Range -328 to 536 F
  • In Stock!

$75.00 / lb.

PTFE / Acrylic Packing with Kevlar Corners

  • Abrasive resistant
  • Anti-extrusion design
  • Prevents Roll
  • Excellent as End rings
  • Rated to 500 F
  • Speed to 200 FPM
  • Pressure to 300 PSI
  • Interlock braid

$86 per lb.

Flexible Graphite Packing

  • Expanded Graphite
  • Self Lubricating
  • Minimizes water loss
  • Can be run dry
  • High Temp 850 F
  • Steam service to 1200 F
  • Speed to 4000 FPM
  • Interlock Braid

$70.00 /lb.

Kevlar (Aramid) Packing

  • Aramid fiber packing
  • Extremely durable
  • Excellent in reciprocating pumps
  • Temp Rating to 500 F
  • Speed to 2500 FPM
  • Pressure 500 PSI
  • Interlock Braid
  • inert lubricant used

$72.00 / lb.

PTFE Packing

  • Chemically compatible
  • Naturally Lubricious
  • Available in “Soft” and FDA grades usseal
  • Temp Rating to 500 F
  • Speed to 1000 FPM
  • Pressure to 300 PSI Pumps
  • Pressure to 2000 PSI Valves
  • Interloock Braid

$79 / lb.

Carbon Packing

  • Chemically compatible
  • Naturally Lubricious
  • Pan Based Carbon
  • Temp Rating to 650 F
  • Speed to 2500 FPM
  • Pressure to 400 PSI Pumps
  • Pressure to 2000 PSI Valves
  • Interlock Braid

$99 / lb.

698 Carbon Packing

  • Chemically compatible
  • Naturally Lubricious
  • Pitch Based Carbon
  • Temp Rating to 850 F
  • Speed to 4000 FPM
  • Pressure to 500 PSI Pumps
  • Pressure to 2500 PSI Valves
  • Interlock Braid

$128 / lb.

Mechanical Seals

How do I choose between a Pump Packing or a Mechanical Seal?

Packing is excellent in a wide range of applications. The factors to consider are is leakage acceptable, and what cost target are you trying to stay under in the short term and long term. Mechanical seals are generally more expensive initially. However the longer you keep your pump in service, the more cost effective a mechanical seal can be. Most packings must leak an average of 6 drops per minute (with the exception of flexible graphite), to lubricate the shaft. American Seal & Packing stocks both packing and mechanical seals, and can help you decide what is best in your application.

Get In Touch

(888) 654-SEAL

1537 E. McFadden Ave-A
Santa Ana, CA. 92705


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Thur: 7:30am - 5pm
Fri: 7:30am - 5pm
Sat: Closed
Sun: Closed

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