4.
Product Working Principle:
Forbes Marshall Cast Strainer is used to remove dirt, debris and other foreign particles from the
fluid, it restrict the particle size which are larger than specified sieve size (mesh or perforation).
Pressure drop across the strainer will increase as dirt and debris will block the opening of the sieve.
As pressure drop increases above certain specified limit the strainer sieve need to be cleaned.
5.
Installation Guidelines : [Refer Figure 3 and 4]
Note
: Before implementing any installations observe the 'Important Safety notes” in
section 2. Referring to the Installation and Maintenance Instructions, name-plate and
Technical Information Sheet, check that the product is suitable for the intended
installation.
1.
Check the direction marked on the strainer and the direction of fluid flow.
2.
Remove protective covers from connections.
3.
Strainer can be fitted on steam /gases and liquid systems in either horizontal pipework or
vertical pipework when the flow and strainer pocket pointing downward. In a horizontal
pipeline on steam / gas system the strainer pocket should be in the horizontal plane as this
reduces the possibility of water hammer because of condense steam get accumulated in
screen when strainer pocket pointed downward. On liquid systems the strainer pocket
should point downwards.
4.
Suitable isolation valves must be installed to allow for safe maintenance.
Note:
Never install strainer in vertical pipework with flow from bottom to top it can lead to
re-entrainment of filtered dirt or foreign particles back into the incoming flow.
5.
Strainer can be lagged (insulated) if required.
Figure 3 : Strainer installation on horizontal pipework
Figure 4 : Strainer installation on vertical pipework
6.
Start-up and Commissioning:
6.1. Flushing of lines:
As part of pre-installation all fluid handling equipment particularly piping should be
thoroughly cleaned of scale and the internal debris which accumulates during construction.
This is accomplished by blowing or flushing with air, steam, water and other suitable
Strainer installed on steam or gas line
Strainer installed on liquid line
Flow downwards
Flow upwards
7
FMSTR34, FMSTR54, FMSTR54#600