When it comes to installing mechanical packing in equipment like pumps or agitators, the method you choose can significantly impact its effectiveness and longevity. One of the critical decisions is whether to roll or pound the packing into place, especially when the shaft isn't perfectly centered within the stuffing box.

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Understanding the Issue: Shaft Misalignment

Shaft misalignment can occur due to many reasons such as bearing runout or the design of an extended shaft with a hub, causing it to droop. Addressing this misalignment is crucial for ensuring the packing seals effectively without causing unnecessary wear or leaks.

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❌ Pounding Method

Pounding the packing into place using a hammer might seem like a quick fix, but it can have negative effects.

The yarns used in braided packing are designed to maintain their integrity for mechanical stability.Hammering can break these yarns, compromising the packing's ability to maintain a reliable seal.

Moreover, the uneven force from pounding can create hills and valleys on the packing surface, potentially leading to leak paths that defeat the purpose of using packing.

Check out the video above fora visual demonstration.

We do not recommend the pounding method for installing mechanical packing.

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✅ Rolling Method

Rolling the packing is a more precise and gentle method that preserves the packing's structural integrity.Using a tool like a deep-well socket or a piece of pipe, you can smoothly compress the packing into place without damaging its yarns.

This method creates an even surface that reduces leaks and keeps the packing stable over time.

Check out the video above fora visual demonstration.

The rolling method is our preferred way of installing mechanical packing.

Tips for Cutting and Installing Packing

●     Avoid Skive Cutting: Instead of skive cutting[1] , which we would otherwise recommend, cut the packing straight and overlap the ends slightly when you roll it into place. This method, called a butt cut, fills gaps better and makes sure it fits tightly.

●      Consider a Larger Size: If the packing needs more pressure because the shaft isn't aligned perfectly, choose a slightly bigger size and roll it in well. This can fix the alignment issue without affecting the seal.

Proper Packing Extends theLifespan of Your Equipment

Using a hammer might be suitable for certain tasks, but when it comes to installing mechanical packing, rolling is the preferred method. It protects the packing's integrity, reduces the risk of leaks, and ensures the equipment operates reliably.

By understanding and implementing proper packing installation techniques, you can extend the lifespan of your equipment and minimize maintenance issues.

Next time you're faced with packing installation, remember: roll, don't pound. Your equipment will thank you for it.

Link to skive cut vs. butt cut article.

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