Storm Valves
Strom Valves JIS
Strom Valves JIS is a group of 42 IMPA-coded items (codes 754201–754299) under Storm Valves in the Valves & Cocks section (IMPA 75). All of them are priced per piece. The names most often specify cast steel (14 of 42). The list runs through 7 metric sizes from 50 mm to 200 mm.
Buying guide
A storm valve is the automatic non-return valve fitted at the ship’s side on an overboard discharge, so the sea cannot flood back inboard. This group holds JIS-pattern storm valves in vertical and angle types, in sizes from 50 to 200 mm, plain or with a handle for positive closing, in ductile-iron (FCD) and cast-steel bodies.
They sit on scupper, sanitary and machinery discharges below the freeboard deck. The engineer or superintendent raises them when a flap sticks or a body wastes, and often as a dry-dock item.[1]
How to specify it
State the type (vertical or angle), nominal size, flange standard and class, body material, and whether a handle (positive means of closing) is required. Copy the full type code in the IMPA description, which encodes body, pattern and handle.
Body material is not a free choice at the shell. FCD is the JIS designation for spheroidal-graphite (ductile) iron castings to JIS G 5502, which is not the same as ordinary grey cast iron.[2][1]
Rules and certificates
Load Line regulation 22(1)(a): each separate discharge led through the shell from below the freeboard deck normally has one automatic non-return valve with a positive means of closing from above the freeboard deck. Where the inboard end is at least 0.01L above the Summer Load Line, two automatic non-return valves without positive closing may be fitted; above 0.02L, a single automatic non-return valve may be accepted.[1]
Regulation 22(4): scuppers and discharge pipes penetrating the shell more than 450 mm below the freeboard deck or less than 600 mm above the Summer Load Line need a non-return valve at the shell. Regulation 22(6): shell fittings and these valves must be of steel, bronze or other approved ductile material; ordinary cast iron is not acceptable.[1]
Questions buyers ask
- Do I need a storm valve with a handle?
- Normally yes: Load Line regulation 22(1)(a) asks for one automatic non-return valve with a positive means of closing from above the freeboard deck, unless the inboard end of the discharge is high enough above the Summer Load Line for the relaxations in that paragraph.
- Is an FCD storm valve cast iron?
- FCD is spheroidal-graphite (ductile) iron to JIS G 5502, not ordinary grey cast iron, which regulation 22(6) excludes at the shell.
Sources
Published by Sherif Awad, founder of GeoMarineHub — in ship supply since 1990, a family business since 1981 (45 years). Last checked .
At a glance
Part of Valves & Cocks (IMPA section 75): Globe, gate, check, ball and butterfly valves, cocks and strainers, by standard, rating and material.
It is one of 3 groups under Storm Valves; the others include Strom Valves (DIN), Strom Valves 90deg. (DIN).
Post the ones you need as a requirement and verified suppliers activated at your port bid on them — sealed, so nobody sees another bid.
- Items
- 42
- IMPA codes
- 754201–754299
- Priced
- per piece
- Materials
- cast steel
- Sizes
- 50 mm – 200 mm
Items
Also under Storm Valves
Most requested sections