Duplex Filters
Duplex basket filter & strainer permits continuous operation because flow can be switched back and forth between two filter
sections. This allows one side to be serviced while the other is in use. Normally duplex basket filters are separated with three
way ball valves or two way ball valve/ butterfly valve connected with equalization tee, between two baskets filter housing.
Operation of Duplex filters
Unfiltered liquid enters the basket housing and passes down through them. Duplex Basket filters & strainers are normally supplied with nut/bolt arrangement at the top of filter element. This will ensure any type of bypassing & confirm the position of basket, even in case of reverse flow. Fluid bypass around the basket is prevented by an optional O’-Ring seal between the basket rim and the housing inside diameter. The valves provided along with the assembly make sure you get intermittent operation.
Duplex Basket filters & strainers are normally supplied
with nut/bolt arrangement at the top of filter element.
Duplex Filters
Duplex Filters
Duplex Filters
Salient Features of Duplex filters
No shutdown time
Online change over to either of strainer vessels
Dimensionally flexibility due to fabricated construction
Both inline & offline connection available
All housings made from SS 316 L, SS 316 & SS304 are mirror
polished to resist adhesion of dirt and scale
Carbon steel housings are Epoxy coated & finally painted with two
coats of synthetic enamel
High temperature & high pressure design are available
Design Features of Duplex filters
Custom modifications available to suit customers required
Strainers designed to meet requirement of ASME section VIII div-I
Ball valve, gate valve butterfly or other valves can be provided as
per requirement
304 / 316 perforated screens / mesh are standard
Drain vents & differential connection are standard and are
furnished with plugs
Material of Construction
of Duplex filters
Carbon steel (All Grades)
Mild Steel
Caste steel
S.S. 304
S.S. 316
S.S. 316 L
Application of
Duplex filters
Process Industries
Chemical Industries
Oil & Gas Industries
Process Industries
Chemical Industries
Oil & Gas Industries
Size
Range
Connection Size – 1’’ to 16’’
Class #150 to #300