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 carbon steel, brass and 316 stainless steel, or all 316 stainless steel materials of construction

¹The LMO Spring Seal Series housing is not recommended for metallic cartridges. For metallic cartridges use the LMO Vari-Seal housing only.
²When fitting with 4 in (10.2 cm) DOE membrane filters, please order filters under Code 550 to assure proper fit.

Materials of Construction

Construction	Head3	Shell
LMOSS	Cast Iron4	316 Stainless Steel
LMOSS S	Cast 316 Stainless Steel	316 Stainless Steel

Maximum Operating Pressure

• 12.1 bar (175 psig) @ 93 °C (200 °F)

Connections

• Inlet/Outlet: 1/2", 3/4", or 1" NPT
• Drain
  • LMOSS: Drain Plug, Carbon Steel, 1/4" NPT
  • LMOSS S: Drain Plug, 316 Stainless Steel, 1/4" 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

Dimensional Data (Nominal)

	Connection Size				Dimensions cm (in)
Model	1/2 in.	3/4 in.	1 in.	Flow Rate5 gpm	A	B	Sealing Distance cm (in)	Weight kg (lbs)
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)

³Housing head has mounting bosses which accept self-tapping screws.
⁴Painted exterior .
⁵Dependent 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

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

Example Part Number: LMOSS 10 S - 3/4  (See bold references in tables below)

Part Number: LMOSS < Length Code from Table 1 > < Material Code from Table 2 > - < Connection Size Code from Table 3 > < Connection Style Code from Table 4 >

Table 1 - Cartridge Length

Code	Cartridge Length (cm/in)
4	10.2/4
10	25.4/10
20	50.8/20
30	76.2/30

Table 2 - Materials of Construction

Code	Materials of Construction
Blank	Cast Iron and 316 Stainless Steel
S	316 Stainless Steel

Table 3 - Connection Sizes

Code	Connection Size
1/2	1/2 in.
3/4	3/4 in.
1	1 in.

Table 4 - Connection Styles

Code	Connection Style
Blank	NPT
F	Flange6

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