LMO Spring Seal Series Filter Housings

Self-Adjusting Sealing Device Ensures Positive Filter Cartridge Seal

• Provides positive sealing of non-compressible filters¹ such as pleated, carbon, metallic, and membrane cartridges
• Accepts 10.2 cm (4 in.), 25.4 cm (10 in.), 50.8 cm (20 in.), or 76.2 cm (30 in.) DOE filter cartridges²
• O-ring head and shell seal minimizes fluid leakage
• In-line inlet and outlet connections for easy installation
• Cast iron and 316 stainless steel or all 316 stainless steel materials of construction

¹ The LMO Spring Seal Series housing is not recommended for metallic cartridges. For metallic cartridges use the LMO Vari-Seal™ housing only.

² When fitting with 10.2 cm (4 in.) DOE filters, please order filters under Code 550 to assure proper fit.

Housing Specifications

Maximum operating pressure
12.1 bar (175 psig) @ 93 °C (200 °F)

Construction	Head3	Shell
LMOSS:	Cast iron4	316 stainless steel
LMOSS S:	Cast 316 stainless steel	316 stainless steel

Connections
Inlet/Outlet: 1⁄2 in., 3⁄4 in., or 1 in. NPT   

Drain:
LMOSS: Drain plug, 316 stainless steel, 1⁄4 in. NPT
LMOSS S: Drain plug, 316 stainless steel, 1⁄4 in. NPT

Shell O-rings	Ethylene propylene (standard), nitrile, FEP, fluorocarbon elastomer, neoprene, silicone elastomer
Spring seal O-rings	FEP (standard), ethylene propylene

Cover nut O-ring    FEP

Bracket option
Stainless steel brackets are available as a standard option.

T-Handle option
T-handle cover nuts are available in carbon steel or 316 stainless steel. Standard units are supplied with hex head cover nut.

Flange option
150 lb. ANSI raised face flanges are available on the 316 stainless steel units only.

³ Housing head has mounting bosses which accept self-tapping screws.
⁴ Painted exterior for cast iron.

Dimensional Data (nominal)

Model	Connecton Size 1⁄2 in.	3⁄4 in.	1 in.	Flow Rate5 lpm (gpm)	Dimensions cm (in) A	B	Sealing Distance cm (in.)	Weight kg (lb)
LMOSS10		X	X	to 37.9 (10)	34.3 (13.5)	12.1(4.75)	24.8 - 25.6 (9.75 - 10.06)	3.1 (6.75)
LMOSS20		X	X	to 75.7 (20)	59.7 (23.5)	12.1(4.75)	50.2 - 51.1 (19.75 - 20.13)	4.1 (9)
LMOSS10S	X	X	X	to 37.9 (10)	34.3 (13.5)	12.1(4.75)	24.8 - 25.6 (9.75 - 10.06)	3.1 (6.75)
LMOSS20S		X	X	to 75.7 (20)	59.7 (23.5)	12.1(4.75)	74.9 - 76.7 (19.5 - 20.125)	4.1 (9)
LMOSS30S		X	X	to 113.6 (30)	85.1 (33.5)	12.1(4.75)	49.5 - 51.1 (29.5 - 30.19)	5.1 (11.25)

⁵ Dependent upon cartridge selection, fluid viscosity and allowable pressure drop at various flow rates. Refer to cartridge nomograph to determine initial pressure drop of filter cartridge.

Housing Differential Pressure vs. Liquid Flow Rate

 

 

Unit Conversion: 1 bar = 100 kPa

For liquids other than water, multiply differential pressure by specific gravity.

Table 1

Code	Cartridge lengths (cm/in.)
42	10.2/4
10	25.4/10
20	50.8/20
30	76.2/30

Table 2

Code	Materials of construction
Blank	Cast iron and carbon steel
S	316 stainless steel

Table 3

Code	Connection sizes (in.)
1⁄2	1⁄2
3⁄4	3⁄4
1	1

Table 4

Code	Connection styles
Blank	NPT
F	Flange6

⁶ Flanges on the LMOSS S are welded to the cast head. Flanges are not available on the LMOSS models.