What is 472 Packing? A High-Performance General ServicePacking Solution

When it comes to compression packing for pumps and valves, selecting the right packing material makes all the difference for performance, durability, and cost-effectiveness.  

One of our most versatile solutions is the 472Packing - a general service packing that offers superior mechanical strength and extrusion resistance.

In today’s post (and in the video below),we’ll go over everything you need to know about this all-purpose workhorse.

Understanding Compression Packing

Compression packing is a crucial component in pumps and valves, acting as a seal to prevent leaks while allowing for movement. It consists of braided fiber packing that is compressed within a stuffing box, creating a tight barrier against fluid escape.

The effectiveness of the packing depends on the materials used and their ability to withstand pressure, heat, and chemical exposure.

Traditional pump packing materials, such asPTFE and graphite, provide excellent resistance to chemicals and high temperatures. However, standard PTFE-graphite packing lacks mechanicalstability, particularly when exposed to high-pressure environments. This is where 472 Packing stands out.

What Makes 472 Packing Unique?

472 Packing is a combination of Teflon (PTFE)and graphite, reinforced with a polymer-based yarn found in our 2000 series.Traditional PTFE-impregnated graphite yarn is widely used in the industry due to its excellent thermal and chemical properties. However, one challenge with standard PTFE-graphite packing is its mechanical stability, particularly its extrusion resistance when under pressure.

The Challenge with Standard Packing

In high-pressure applications, traditional pump packing can begin to flow and creep between the shaft seal and the bottom of the stuffing box, reducing efficiency and longevity. This happens because pure PTFE-graphite yarn is relatively soft, allowing it to deform under load.This deformation can lead to premature packing failure, requiring frequent replacements and increasing maintenance costs.

To address this, our 472 Packing consists of 50% PTFE-graphite yarn and 50% polymer-based yarn, significantly enhancing mechanical strength and extrusion resistance. By combining these materials, we have created a packing solution that retains the beneficial properties of PTFE-graphite while eliminating its major weakness.

What are the Benefits of Style 472 Packing?

Our Style 472 Packing provides a range of benefits for use in slurry pumps, pumps, and valves, including:

●     High Extrusion Resistance: Prevents creeping and maintains stability under high-pressure conditions.

●     Superior Abrasion Resistance: Withstands wear and tear in challenging applications.

●     Enhanced Durability: Handles pounding and mechanical stress effectively.

●     Broad Chemical Compatibility: Seals chemicals across a pH range of 1 to 14.

●     High-Temperature Performance: Operates at temperatures up to 500°F (260°C) in both oxidizing and non-oxidizing environments.

●     Optimized for High Velocities: Suitable for applications with velocities up to 2,500 feet per minute.

These features make 472 Packing an excellent choice for industries dealing with high-temperature environments, aggressive chemicals, and high-speed rotating equipment.

Why Extrusion Resistance Matters

Extrusion resistance is a critical factor in pump packing because it determines how well the packing maintains its shape under load. When packing extrudes, it can lead to increased friction, overheating, and even equipment failure.

By using a polymer-based reinforcement, Style472 Packing maintains its structural integrity even under extreme conditions.This means fewer adjustments, reduced maintenance, and a longer lifespan for both the packing and the equipment it protects.

Why Choose Style 472 OverStandard PTFE-Graphite Packing?

Unlike many other general service packing options, our Style 472 Packing combines the benefits of PTFE-impregnated fiber with enhanced mechanical stability. This makes it an ideal solution for industries requiring reliable pump packing that resists extrusion while maintaining a tight seal.

Best of all, our Style 472 Packing is competitively priced compared to traditional 100% PTFE-graphite packing, offering superior performance at a similar cost.

What are the Common Applications for Style 472 Packing?

Style 472 Packing is designed for a variety of applications, including:

●     Slurry pumps: Provides exceptional resistance to abrasive materials.

●     Pumps and valves: Ensures long-lasting performance in high-pressure systems.

●     Chemical processing: Resistant to a wide range of aggressive chemicals.

●     Power generation: Withstands high temperatures and extreme operating conditions.

●     Food and beverage processing: Suitable for environments requiring chemical and heat resistance.

These applications demonstrate the versatility across different industries, making it a go-to solution for companies looking for reliable fiber packing products.

A Reliable and Cost-EffectivePacking Solution

If you’re looking for a compression packing material that offers high-temperature resistance, superior extrusion resistance, and exceptional durability, Style 472 Packing is the go-to choice.

It outperforms traditional PTFE-graphite packings by providing the added strength needed to prevent extrusion while maintaining the chemical and thermal stability expected in high-performance packing materials.

Get in Touch for More Information

Contact us today to learn more and find out if it's the right fit for your application!

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