JIS F7398 Fuel Oil Tank Self-Closing Drain Valve – Automatic Safety Drainage for Marine Systems
Product Overview
The JIS F7398 Fuel Oil Tank Self-Closing Drain Valve is an essential safety component designed for automatic drainage control in marine fuel oil, lubricating oil, and seawater piping systems. Engineered to JIS F7400 standards with sizes from DN15 to DN100 and pressure ratings of 5K/10K, this valve features a spring-assisted self-closing mechanism that ensures automatic shut-off after operation. Constructed with bronze body and corrosion-resistant components, it provides reliable performance in shipbuilding, vessel repair, and offshore applications where controlled drainage is critical.
Key Features & Benefits
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✅ Automatic Self-Closing Mechanism – Spring-assisted closure prevents accidental fluid release
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✅ Dual Pressure Ratings – 5K and 10K options for various system requirements
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✅ Bronze Construction – Excellent corrosion resistance for fuel and seawater applications
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✅ Safety Compliance – Meets JIS F7398 standards for marine drainage valves
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✅ Wide Size Range – DN15 to DN100 for versatile applications
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✅ Non-Asbestos Sealing – Environmentally safe gaskets and packing materials
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✅ OEM Customization – Accepts custom materials and branding requirements
Material Composition
| Component | Material | Advantage |
|---|---|---|
| Body (15A-50A) | Bronze | Superior corrosion resistance |
| Disc & Seat Ring | Bronze | Reliable sealing and durability |
| Bonnet | Bronze/Cast Steel | Strength and corrosion protection |
| Stem & Bush | Brass | Smooth operation and corrosion resistance |
| Spring | SWP-A | High-grade spring steel for reliable closure |
| Sealing Elements | Non-Asbestos | Environmentally safe and reliable |
Technical Specifications
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Nominal Diameter: DN15-DN100
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Pressure Ratings: 5K / 10K
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Standard: JIS F7398, JIS F7400
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Media: Fuel Oil, Lubricating Oil, Sea Water
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Applications: Shipbuilding, Ship Repair, Offshore Platforms
Dimension Table
5K Rating
| Size | d | D | c | N-h | t | L | L1 | H |
|---|---|---|---|---|---|---|---|---|
| 15A | 25 | 80 | 60 | 4-12 | 9 | 130 | 65 | 130 |
| 20A | 25 | 85 | 65 | 4-12 | 10 | 130 | 65 | 130 |
| 25A | 25 | 95 | 75 | 4-12 | 10 | 130 | 65 | 130 |
| 32A | 40 | 115 | 90 | 4-15 | 12 | 180 | 90 | 165 |
| 40A | 40 | 120 | 95 | 4-15 | 12 | 180 | 90 | 165 |
| 50A | 50 | 130 | 105 | 4-19 | 14 | 220 | 110 | 195 |
| 65A | 65 | 155 | 130 | 4-19 | 14 | 270 | 135 | 255 |
| 80A | 80 | 180 | 145 | 4-19 | 14 | 290 | – | 255 |
| 100A | 100 | 200 | 165 | 8-19 | 16 | 300 | – | 280 |
10K Rating
| Size | d | D | c | N-h | t | L | L1 | H |
|---|---|---|---|---|---|---|---|---|
| 15A | 25 | 95 | 70 | 4-15 | 14 | 130 | 65 | 130 |
| 20A | 25 | 100 | 75 | 4-15 | 14 | 130 | 65 | 130 |
| 25A | 25 | 125 | 90 | 4-19 | 14 | 130 | 65 | 130 |
| 32A | 40 | 135 | 100 | 4-19 | 16 | 180 | 90 | 165 |
| 40A | 40 | 140 | 105 | 4-19 | 16 | 180 | 90 | 165 |
| 50A | 50 | 155 | 120 | 4-19 | 16 | 220 | 110 | 195 |
| 65A | 65 | 175 | 140 | 4-19 | 18 | 270 | 135 | 255 |
| 80A | 80 | 185 | 150 | 8-19 | 18 | 290 | – | 255 |
| 100A | 100 | 210 | 175 | 8-19 | 18 | 300 | – | 280 |
The description/sizes may be different with goods, please check with us when order.
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