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Methods for Cold Water Savings for Steam Sterilizers

Expertise Series

Here is a briefing on three ways to save water using steam sterilizers.

1. One way to save water for a vacuum steam sterilizer is by using a closed cooling loop for the vacuum pump. In this method :

  • The vaccum steam sterilizer will be equipped with a closed loop to cool the operation of the vacuum pump.
  • The filling and level control of the loop will be done with “cold water“.
  • Cooling of the loop and of the condenser between chamber and vacuum pump will be done with chilled water.

Circuit Diagram:

SBM_Cold_Water_Savings1

This method saves on average 300 liters of cold water per batch.


2. Another method that can be used for a vacuum steam or a steam-air sterilizer is a closed loop for jacket cooling or internal heat exchanger cooling. In this method:

  • The equipment consists of a buffer tank with a certain volume, level controlled, a chilled water cooled plate heat exchanger, a circulating pump and the required pipe work system valves.
  • All required control devices for a full automatic operation are included.
  • The required equipment will be installed in the maintenance area of the autoclave.

SBM_Cold_Water_Savings2

Depending on sterilizer size, this method could save >1000l/h saving depending on the size.


3. Another method that can be used for a vacuum steam or a steam-air sterilizer Use of a plate heat exchanger instead of spray water condenser in the downstream line. In this method:

  • The line is equipped with a plate heat exchanger. The plate heat exchanger is connected to a closed chilled water loop.

SBM_Cold_Water_Savings3

Depending on sterilizer size, this method could save >300l/h saving depending on the size.


This article was written by Sean Gamlin. For more information contact Sean here.

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