Strainers And Filters

Question 1

Describe the purpose of trainers & filters

Answer 1

Mechanical separation of particulates and debris from a process flow to protect equipment
Strainers remove >40 microns
Filters< 40 microns

Question 2

Describe operation of strainers at PV

Answer 2

Basket: remove large particles allow higher flow
Y strainers: in-line strainer handles high pressure

Question 3

Types of filters @ pv

Answer 3

Cartridge filters
Deep bed filters: sand, media
Stacked disc metal edged filters: mostly used in oil systems
Air filters: mostly radioactive filtration

Question 4

Explain abnormal differential pressure across strainers and filters

Answer 4

If it goes down instead of up that would mean that there is a malfunction with the strainer

Question 5

Tell-tale strainers

Answer 5

Contain a cartridge or screen and an external indicator to display the status