Catchpots and Drain Vessels for use with Coalescing Filters

Here at Classic Filters we are constantly being asked to solve customers problems. Today we are going to look at two of the most common problems found in coalescing filtration and the use of catch pots:-

1. How to get the liquid away from the element?

2. How to extend the time required between each time the housing is emptied of liquid?

What is a Catch Pot?

First of all, for those that don’t know a catchpot is a housing used to remove the bulk of the liquid before a coalescing filter. Sometimes if there is a large quantity or ‘slug’ of liquid it can flood the coalescing filter element and cause carry-over. The catchpot eliminates this problem by removing the bulk of the liquid and allowing the coalescing filter to perform at the highest efficiency possible.

Catchpot housing flow path showing how the bulk of liquid is removed

Catchpot housing flow path showing how the bulk of liquid is removed

The change in direction of the gas as it flows though the catchpot housing is enough to knockout most of the water – it will collect in the bowl of the housing and can be removed manually with a valve, by an automatic float drain or with a continuous drain connection.

Drain vessel flow path when used with a coalescing filter housing and valves

Drain vessel flow path when used with a coalescing filter housing and valves

 

Using A Drain Vessel

One of the easiest ways to solve both of these problems is to use a drain vessel. Drain vessels can either be attached directly to the drain port of a housing in effect extending the bowl of the housing to allow much more liquid to be stored before the element gets submerged, or they can be attached by means of a valve with a valve on the drain end so that the housing can be emptied into the drain vessel and then the drain vessel emptied .

There are several reasons to isolate the drain vessel, the most common is when the system is at low pressure or has a low volume going through the system or the system could be at negative pressure, the drain vessel in these instances allows the system to be balanced before discharging the liquid and it minimises the volume of gas lost, which can be vital on systems using dangerous gases.

As well as our standard range of drain vessels we build a large number of special ones, we have even produced them as capture and storage vessels with specific volumes.

So whether it is high pressure, low pressure, high volume, low volume or it require exotic materials, we either have a standard product or we can produce vessels to your requirement.

 

Are You Using Drain Vessels or Catchpots?

If you have used a drain vessel or catchpot in an interesting way we would love to hear about it. Share in the comments below, use the form on the right or send us an email to info@classicfilters.com

 

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