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Multi-Cartridge Housings 12FOS and 22FOS

The Shelco 12FOS and 22FOS round multi-cartridge housings are designed for flow rates up to 600 GPM. Housings accept double-open-end style cartridges. Options include 304L or 316L stainless steel housings with band clamp or swing bolt closure. Designed to operate at 150 psi (10 bar) @ 300º F (149º C).

Equipped with standard inlet and outlet connections, but many other options are available by special order to make installation easy. Designed with a standard Poly-coat finish over the stainless steel housing. All twelve and twenty-two round models come with heavy-duty mounting legs. Standard gaskets are FDA grade Buna-N.

DownloadMulti-Cartridge Housings – 12FOS and 22FOS BrochureMulti-Cartridge-Housings-12FOS-22FOS


  • Designed for industrial and commercial filtration needs
  • Heavy duty stainless steel construction for durability
  • 304L standard and 316L stainless steel available
  • Band clamp and swing-bolt closures for quick cartridge change outs
  • Heavy-duty mounting legs standard
  • Pipe fittings readily accessible for easy installation
  • Knife edge seal at both cartridge ends to eliminate by-pass
  • Adjustable top plate for more cartridge options
  • Adapters for 222 or 226 style cartridges available by special order.
  • Complete selection of pipe fittings, flanged, sanitary, BSP, Grooved and others
  • See ordering guide for a complete section of options to fit your application

Compatible Filters

String Wound Filter Cartridges - Melt Blown Depth Cartridges - ME Series Pleated Cartridges
High Efficiency Pleated Cartridges - Carbon Filter Cartridges - Stainless Steel Cartridges


Maximum Operating Pressure150 psig (10.3 bar) @ 300°F (149°C)
Inlet and Outlet ConnectionsInlet /Outlet: 3" (12FOS) and 4" (22FOS) RF Flanges
Drain Ports: 1/2" FNPT
Vent Ports: 1/4" FNPT (12FOS), 1/2" FNPT (22FOS)
Optional: RF flanges, Sanitary ferrules, MNPT, FNPT, BSP and Grooved fittings.
Materials of ConstructionHead and Shell: 304L or 316L Stainless Steel
Connections: 304L or 316L Stainless Steel
Closure: Clamp: 304L Stainless Steel; Swing Bolts: Zinc Plated Steel
Vent and Drain Plugs: 304L or 316L Stainless Steel
Mounting Legs: 304L Stainless Steel
GasketsBuna N (FDA Grade)
Optional: EPR, Silicone, Viton or Teflon Encapsulated Silicone
FinishPoly-coat on exterior surfaces
Optional: Electro-polish, Glass bead or Passivate
Cartridge TypeDOE style cartridges (maximum 2 3/4" diameter for 12FOS and 2 5/8" diameter for 22FOS series)
Optional: 222 and 226 adapters. For 2 3/4" cartridge 22FOS series holds twenty-one cartridges… order as 21FOS housing.
Custom Options- Gauge Ports or Gauge Ports with Pressure Gauges

Ordering Guide (Example: 12FOS3SB-316-222-3F-GP-B)

ModelCartridge LengthClosure StyleMaterialCartridge ConfigurationConnection SizeConnecion TypeOptionsGasket
2 = 2 High
3 = 3 High
4 = 4 High
C = Clamp
SB = Swing Bolt
304 = 304L
316 = 316L
Blank = DOE Style Cartridges (Standard)
222 = 222 Fin/Flat Style Cartridges
226 = 226 Fin/Flat Style Cartridges
3 = 3" (Standard for 12FOS)
4 = 4" (Standard for 22FOS)
2 = 2"
F = Flange (Standard)
TC = Ferrules
GF = Grooved Fittings
MNPT = Male NPT*
FNPT = Female NPT*
GP = Gauge Ports
GPA = Gauge ports with Gauges
EP = Electro-Polish
GB = Glass Bead
P = Passivate
B = Buna N (Standard)
S = Silicone
V = Viton
TS = Teflon Encapsulated Silicone

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