Stuffing Box

A stuffing box is an enclosure that prevents fluid from leaking out of a pump or other mechanical device. It is typically located where a shaft or rod enters the device’s housing and is used to create a protective barrier between the moving parts and the fluid being pumped.

Stuffing Box Packing For Your Pump

The stuffing box houses these components: a gland, a packing material, and a gland follower. The gland is a circular piece of metal or other material that precisely attaches to the pump’s housing. It has a hole in the center that allows the shaft or rod to pass through while providing a surface for the packing material to be installed.

The stuffing box packing material is a series of rings or segments placed around the shaft or rod, forming a seal between the moving parts and the pumped fluid. The stuffing box seal is made from an elastomeric or plastic material that is resistant to continuous wear and tear and can take on the high pressures and temperatures encountered in pump applications.

The gland follower is a circular piece of metal or other material that sits on top of the pump gland packing material, pressing it against the gland to create a tight seal.

Stuffing Box Packing Kit

In addition to core stuffing box components, a stuffing box packing kit includes other accessories, such as a drain or vent port to remove excess fluid from the area and grease or oil fitting to allow lubrication of the packing material.

Prevent Leakage With A Stuffing Box Seal

By creating a barrier between the moving parts and the process fluid; the stuffing box helps to keep the liquid contained and prevent leaks from leaking out of the pump. This reduces the risk of damage to the pump or other components. The stuffing box packing can improve the pump’s efficiency and performance. Keeping the fluid contained can help maintain the pressure and flow rate of the pump, which can maximize its output.

Stuffing Box Glands Extend the Life of Your Pump

Another benefit of using a stuffing box in a pump is that it prolongs the pump’s lifespan and components. The packing material is specifically designed to withstand the high pressures and temperatures in a pump’s application and can even prevent wear and tear on the plunger or rod and other moving parts. The need for maintenance and repairs will be far less frequent, saving you time and money over the pump’s life.

Shaft Packing Glands Support Sustainability

A stuffing box can help protect the environment by preventing fluid leakage. Fluid leakage from your pump can cause contamination of surrounding soil and water, resulting in severe consequences for the surrounding ecosystem. A stuffing box containing the fluid can significantly reduce the risk of environmental contamination.

Two Standard Stuffing Box Seals

Several types of stuffing boxes are commonly used in pumps, including single and double packing, and lantern rings. Each type has unique features and benefits, and the appropriate type will depend on the specific application and requirements of the pump.

Single-packing stuffing boxes are the most basic type and consist of a single layer of packing material installed around the shaft or rod. They are simple and inexpensive but may not provide as effective a seal as other stuffing boxes.

Double-packing stuffing box consists of two layers of packing material to create an effective barrier between the moving pump parts and the fluid. The main benefit of using a double-packing stuffing box is that it provides an additional barrier between the moving parts and the fluid, helping to create a more effective seal. Fluid leakage that can be stopped prevents safety hazards and environmental contamination. The double-packing stuffing box improves a pump’s efficiency and long-term performance.

When Is It Best To Avoid Using A Stuffing Box Seal?

Here are four situations when it isn’t appropriate to use a stuffing box that you will want to know.

1. If the fluid being pumped is highly abrasive or corrosive. The packing material in the stuffing box may wear out quickly, which could mean frequent replacement and maintenance. In this case, it would be better to use a different type of seal, such as a mechanical seal in a centrifugal pump.

2. If the pump operates at very high pressures or temperatures, the packing material in the stuffing box may not withstand extreme conditions. Using a different packing material or a different sealing system may be necessary.

3. If the pump operates in a high-vibration environment, the stuffing box may not be able to maintain its tight seal. This can lead to fluid leakage due to the vibrations.

Using a stuffing box in a pump is only sometimes appropriate, and depending on the situation, a different seal or sealing system might lead to better pumping operations. It is essential to evaluate the pump’s specific application and requirements carefully and choose the appropriate sealing system accordingly.

Select Your Goulds Stuffing Box From Platinum Performance Products

At Platinum Performance Products, we offer a wide range of Replacement Goulds pump stuffing box sizes, 3196 ST, MT, LT, and XLT. These stuffing boxes are available in the following sizes:

Goulds 3196

ST 1.357”

Goulds 3196

MT 1.750”

Goulds 3196

LT 2.125”

Goulds 3196

XLT 2.500”

Disclaimer: Platinum Performance Products provides parts that are compatible with or can replace different original equipment manufacturer (OEM) parts. The mention of any OEM names, trademarks, model numbers, or part numbers is purely for reference and does not indicate that we are an authorized distributor or representative of the listed companies and brands. We do not claim any association or affiliation with any of the OEM manufacturers mentioned on our website or in our product descriptions.

A Goulds pump stuffing box is made to provide a tight seal between the pump shaft and the surrounding equipment, preventing fluid leakage and ensuring reliable pump operation. If you have any questions about Stuffing Boxes, don’t hesitate to contact us at