Master the Art of Slurry Pump Packing Replacement

08-26 15:34

How to replace the packing (also known as gland) of a slurry pump? The seal of a slurry pump can be divided into packing seal and mechanical seal. Packing seals are generally more cost-effective, so they are commonly used. However, after a period of use, the packing may experience significant slurry leakage, indicating that it needs to be replaced. So, how do you replace the packing? Below, Pan Shi Pump Industry will provide you with a detailed explanation on how to replace the packing (gland).

How to Replace the Packing (Gland) of a Slurry Pump

The seal of a slurry pump can be divided into packing seal and mechanical seal. Packing seals are generally more cost – effective and thus commonly used. However, after a period of use, significant slurry leakage from the packing may occur, indicating the need for replacement. Pan Shi Pump Industry will explain in detail how to replace the packing (gland) below.

Understanding Packing Seal

A packing seal is a dynamic sealing device that generates compressive force between the packing, rotating parts, and stationary parts through pre – tightening or the self – tightening effect of the medium pressure. Also known as “packing box seal”, it has various structural forms, mainly composed of packing, packing box, and packing gland.

Cause of Packing Seal Leakage

The common cause of leakage in the packing seal of a slurry pump is high – temperature generation due to friction. This causes the volatilization or carbonization of certain components in the packing, resulting in leaking gaps. Replacing it requires attention to many details.

Steps to Replace the Packing

Select the appropriate packing based on the pump model.
Before replacing the packing, stop the pump.
Close the inlet and outlet valves of the pump, open the vent valve and drain valve, release the residual pressure in the pump, and avoid operating under pressure.
Remove the adjusting screws of the packing gland and take off the gland.
Thoroughly clean the old packing from the packing box.
Check the surface wear of the shaft sleeve.
Cut the new packing according to the outer diameter of the shaft sleeve and add it to the packing box one by one as required.
After adding the new packing, put on the packing gland and tighten the adjusting screws evenly.
Rotate the shaft for 3 – 5 turns to check the tightness of the packing and its smooth rotation.
Open the pump inlet valve and start the pump according to the operating procedures for testing.