How to install mechanical seal in a centrifugal pump? | LEAK-PACK

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How to Install Mechanical Seal in a Centrifugal
Pump?
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Mechanical Seal in a Centrifugal Pump
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PROCEDURE TO INSTALL MECHANICAL SEAL IN A
CENTRIFUGAL PUMP

• What is a centrifugal pump? It uses the
  centrifugal force to push water through the hoses
  and plumbing system.
• It has a shaft that spins at great speed and
  rotates an impeller. Due to the rotation of the
  impeller, centrifugal force generates, and vacuum
  is created.
• Thus, water gets pulled in the pump with a
  tremendous force.
• Behind the spinning impeller, a mechanical seal
  is positioned. It prevents water entering the
  electrical motor.
• When qualified engineer replaces or installs the
  mechanical seal, he opens the pump system the
  removes the impeller from the shaft.

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MATERIAL NEEDED

• The engineers come with a variety of tools to
  perform the installation or replacement of
  mechanical seals.
• Wrench- to open the pump
• PVC Saw-to cut the plumbing lines
• PVC primer and glue- to fix PVC parts
• Mechanical seal

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PROCEDURE

• First, engineer turns off the pump. It is
  critically important. He shuts off the breaker
  that supplies electricity to the pump.
• He cuts the PVC plumbing and removes the pump to
  an area that is comfortable to work.
• The bolts are unscrewed, and the motor is
  disconnected. The engineer uses wrench to perform
  this activity.
• He removes the impeller by rotating it in the
  anticlockwise direction of the shaft.
• He takes out the seal which is at the backside of
  the impeller.

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PROCEDURE

• He places the mechanical onto the shaft. Utmost
  care is taken while placing the seal. If it gets
  body oil on the seal face while sliding, then the
  seal may not function properly. The performance
  gets compromised due to the lubricant.
• Once the seal is fixed, the engineer uses wrench
  to screw the impeller onto the motor shaft of the
  centrifugal pump. For this, he fixes the shaft,
  lines up all bolt holes and insert the bolts.
• The pump ends are secured using the wrench.
• Once it is done, the centrifugal pump is placed
  again, and plumbing is connected to it.

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• The engineer uses PVC glue and primer to fix the
  plumbing and seal the leakage if any.
• The pump should not be used for at least 24 hours
  after replacing the mechanical seal. It allows
  the primer and glue to dry fully.
• The procedure given here is a general procedure.
  To replace or install the mechanical seal it is
  essential that the work is performed by some
  qualified engineer.
• Also Read
• What is a cartridge mechanical seal?
• How to Respond to Mechanical Seal Leakage in a
  Centrifugal Pump?

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