Storm Valve Cast Steel JIS 5K - F3059
Steel Storm Valve, Straight-Through, JIS 5K F3059
The F3059 is a flanged storm valve (mushroom type) with straight vertical flow configuration, designed for discharge or drainage lines on vessels terminating at the hull. Product classification: Cast Steel, flanged connection, pressure class JIS 5K, straight-through pattern.
Standards & Dimensions
- Series: JIS F3059
- Flanges: JIS B2220 – 5K
- Construction/Test: JIS F7400
- Available DN: 50 to 200
- Test Pressure: 5.1 kgf/cm²
- Type: straight/vertical storm valve with manual shut-off mechanism
Materials of Construction
- Body: cast steel SC49
- Seat: NBR
- Disc: bronze BC6
- Stem: stainless steel SUS403
NBR seat material requires verification for temperature, media compatibility, and presence of oils or chemicals. Typical temperature range for F3059: -10 °C to 60 °C.
Operation & Use
Installed on discharge lines to sea, the valve prevents seawater ingress during wave exposure or backpressure. Manual shut-off is used for positive isolation, supplementing the automatic disc function.
Typical Applications
- Sanitary discharge lines
- Scupper and drain lines
- Bilge discharge (if permitted by specification)
- Overboard discharge piping
- Shipbuilding installations with JIS 5K flanges
Maintenance
Periodic inspection should include seat cleanliness, NBR condition, free disc movement, manual shut-off operation, and cast steel body corrosion. For classed applications, confirm 3.1/3.2 certification or class society inspection as required.
