4.
OPTIONS
IOM manual CTI & CTH centrifugal pumps
27
4.
OPTIONS
4.1.
Lubricated seal – 4Z
A great option when there is a potential risk of dry running, or where the product tends to
solidify or crystallize. An oil reservoir is connected to the mechanical seal chamber.
The pump is delivered without lube medium in oil reservoir!
Before the first start fill up the oil reservoir with a proper
medium (i.e. SAE 20 oil). In case if the pumped medium
cannot be contaminated by oil, you should use a
lubricating medium compatible with the pumped medium;
Medium in the oil reservoir should be also compatible with
materials that the pump is made of (when using oil as
buffering liquid you should not use EPDM O-rings in
mechanical seal);
As a standard, an NBR lip seal is used (other materials are
available upon request);
Oil reservoir should be filled up to ¾ of cup height;
You should change liquid after 2000 hours of operation or
once a year.
For food applications it is recommended to use FDA approved liquid.
Important!
If mechanical seal damage will occur, fluid level in the chamber will increase and then it
will spill out of the oil reservoir. You must stop the pump immediately to replace
mechanical seal!
If liquid level in oil reservoir will start decreasing in short period of time, probably the
lip seal is damaged. You should stop the pump and replace damaged lip seal.
