Technical Datasheet & Specifications
| Parameter | Specification |
|---|---|
| Product Name | NAB Disc Butterfly Valve – API 609 for Seawater |
| Specification | API 609 Butterfly Valve with NAB Disc, Class 150 / PN16, Seawater Service |
| Category | Corrosion Resistant Valves -- Seawater |
| Standard | API 609, EN 593, ASME B16.5, API 598 |
| Applications | Seawater Cooling, Desalination Intake, Offshore Ballast, Marine Firewater |
| Parameter | Specification |
|---|---|
| Body Material | Ductile Iron GGG40 (rubber-lined) / Full NAB C95800 |
| Disc | Nickel Aluminium Bronze C95800 (seawater grade) |
| Seat / Liner | EPDM / Nitrile (NBR) resilient seawater seat |
| Stem | SS316 / Duplex / Monel |
| Bearings | Self-lubricating PTFE |
| Bolting | Super Duplex / Monel |
| Standard | API 609, EN 593, ASME B16.5, API 598 |
| Alternative Materials | Full NAB body for severe seawater erosion service available on request |
| Parameter | Specification |
|---|---|
| Valve Size Range | 2" to 24" (DN50 – DN600) |
| Pressure Rating | Class 150 / PN16 |
| Shell Test Pressure | Hydrostatic 2.4 MPa (24 bar) -- 1.5x PN16 |
| Seat Test Pressure | Hydrostatic 1.76 MPa (17.6 bar) -- 1.1x PN16 |
| End Connection | Wafer / Lug Type, ASME B16.5 / PN16 drilling |
| Face-to-Face | API 609 / ISO 5752 |
| Operation | Concentric resilient-seated butterfly valve with Nickel Aluminium Bronze disc -- lever or gear operated isolation and regulation of seawater cooling, intake, and ballast lines |
| Test | Requirement |
|---|---|
| Shell Test | 1.5 x Rated Pressure (min) |
| Seat Test | 1.1 x Rated Pressure (min) -- Bubble-tight zero leakage |
| Back Seat Test | 1.1 x Rated Pressure (where applicable) |
| Hydrostatic Test | Water at ambient temperature |
| Pneumatic Test | Available on request |
| NDT | 100% MPI/DPT on machined surfaces (if specified) |
| PMI | Positive Material Identification available |
| Visual Inspection | MSS SP-55 / Project specification |
| Dimensional Check | As per drawing / standard |
| Marking | MSS SP-25 / Project specification -- Size, Class, Material, Heat No., Tag No., Serial No. |
| Standard | Description |
|---|---|
| API 600 / BS 1414 | Steel Gate Valves -- Flanged and Butt-Welding Ends |
| API 623 / BS 1873 | Steel Globe Valves -- Flanged and Butt-Welding Ends |
| API 594 / BS 1868 | Check Valves -- Flanged, Lug, Wafer and Butt-Welding |
| API 608 | Metal Ball Valves -- Flanged, Threaded and Welding End |
| API 609 | Butterfly Valves -- Double Flanged, Lug and Wafer Type |
| API 6D | Pipeline Valves (Ball, Check, Gate, Plug) |
| ASME B16.34 | Valves -- Flanged, Threaded and Welding End |
| ASME B16.5 | Pipe Flanges and Flanged Fittings |
| ASME B16.10 | Face-to-Face and End-to-End Dimensions of Valves |
| ASME B16.25 | Buttwelding Ends |
| MSS SP-25 | Standard Marking System for Valves |
| MSS SP-55 | Quality Standard for Steel Castings |
| ISO 5208 | Pressure Testing of Metallic Valves |
| API 598 | Valve Inspection and Testing |
| API 607 / ISO 10497 | Fire Test for Soft-Seated Quarter-Turn Valves |
| BS EN ISO 15848-1 | Fugitive Emission Testing (Class B) |
| Document | Availability |
|---|---|
| Material Test Certificate (MTC) | EN 10204 3.1 (standard) / 3.2 (on request) |
| Factory Test Report | Hydrostatic shell test + seat test |
| NDT Report | MPI / DPT / RT / UT (as specified) |
| PMI Report | Positive Material Identification |
| Fire Safe Certificate | API 607 / ISO 10497 (where applicable) |
| Fugitive Emission Certificate | BS EN ISO 15848-1 Class B (where applicable) |
| Third-Party Inspection | TUV / SGS / BV / Lloyds (client cost) |
| Calibration Certificate | Pressure gauges, instruments |
| Packing List | Per shipment |
| Commercial Invoice | With HS code, value, Incoterms |
| Bill of Lading | As per shipment terms |
Supreme Enterprise
Industrial Valves & Engineering Solutions
4th Floor, Survey No. 235/A and 247/A, E/401,
Nr. Bhattha School, Gyaspur,
Ahmedabad, Gujarat 382405, India
Branch: Mehta House, Relief Road, Ahmedabad 380001
GST: 24AFAFS5839J1ZQ • IEC: AFAFS5839J
Email: info@supremevalves.in
Phone: +91 97732 78770
Web: www.supremevalves.in
The NAB Disc Butterfly Valve – API 609 for Seawater is designed, manufactured, and tested in accordance with API 609, EN 593, ASME B16.5, API 598. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is Ductile Iron GGG40 (rubber-lined) / Full NAB C95800. Alternative and upgraded grades -- Duplex, Super Duplex, Inconel, Monel, Hastelloy, and NACE MR0175 trims for sour service -- are available on request.
It is offered in 2" to 24" (DN50 – DN600) with Class 150 / PN16. End connections include flanged (RF / RTJ), butt-weld, socket-weld, and screwed ends as per specification.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.