Mechanical Packing | Pump & Valve Packing

Mercer Gasket & Shim provides a wide range of high-performance mechanical packing to cater to the most demanding conditions in a wide range of markets. We only carry the highest-quality packing designed to provide superior sealing capabilities in even the most severe environments.

Mechanical valve and pump packings seal mechanical components to reduce leakage. Compression packing—also known as braided packing or sealing rope—is a form of wrapping that expands when compressed and forms a tight seal. Braided packing usually has a square or rectangular cross-section and is made of soft, flexible materials. 

Mercer Gasket & Shim manufactures high-quality mechanical packing to perform in the most demanding industrial conditions. Here we’ll explain how to choose the best mechanical packing for your project and some common applications for these products.

Selecting the Best Mechanical Packing for Your Application

Mechanical packing is most commonly found in centrifugal pumps and mixers. Ring packings are most common for this application—they fit into the stuffing box between the rotating shaft and pump body. The rings expand when pressure is applied, significantly reducing leakage.

Packings come in a variety of materials, sizes, constructions, lubricants, and braid types. Consider the surface speeds, temperatures, and pressures of your application, while also adhering to specific installation procedures.

Mercer offers a comprehensive line of mechanical packing materials in different styles. Our team can help you select the best products for your mechanical packing application.

Common Applications

The most popular applications for braided packing include:

• Centrifugal pumps
• Rotary pumps
• Reciprocating pumps
• Mixers and agitators
• Generators
• Valves
• Expansion joints
• Soot blowers
• Rotating equipment

Compression packing is critical in a variety of industries, including petrochemical, paper, steel, utilities, maritime, water treatment, sewage treatment, and food packaging. These applications often require mechanical packing to withstand harsh conditions while sealing substances such as water, gases, acids, solvents, gasoline, oil, and other chemicals.