Mud Box acc. to JIS F7203

Marine Angle Sediment Strainer JIS F7203

Angle sediment strainer for seawater filtration in marine piping systems, designed according to JIS F 7203-1996 and tested per JIS F 7200-1996. Hydrostatic body test pressure is 0.1 MPa. Available in sizes DN50 to DN100 with 5K and 10K flange options.

Application in Piping Networks

Installed on seawater service lines, pump suction, cooling water, and auxiliary engine room circuits. The angle configuration enables a change in flow direction at the same point where solids are retained.

Used upstream of equipment sensitive to sand, rust, organic debris, or particulates that may cause wear, blockage, or increased differential pressure.

Construction Materials

• Body: FC200
• Bonnet: FC200
• Cover push: FCD400
• Strainer: SS400
• Sealing: O-ring

Material selection must consider seawater compatibility, galvanic contact, temperature, coating system, and cleaning frequency.

Selection Criteria

Before procurement, confirm:

• DN and flange standard, 5K or 10K
• clearance for cover removal
• allowable pressure drop
• class or shipyard specification requirements
• isolation capability for maintenance
• flow direction per piping layout

Maintenance

Periodic inspection includes cleaning the strainer, checking O-ring condition, bonnet sealing, FC200 body corrosion, and monitoring differential pressure. Increased pressure drop typically indicates solids accumulation.

FAQ

Is this an isolation valve?
No. This is a sediment strainer / in-line filter.

What media is it suitable for?
For seawater in marine piping networks.

Key difference from straight strainer?
The angle type changes flow direction and filters in a single fitting.