NAB Ball Valve — ASTM B148 C95800
Supreme Valves manufactures NAB ball valves (nickel aluminium bronze, ASTM B148 UNS C95800) for seawater, brine, marine hull systems, desalination and chlorinated process lines. Full-bore, two-piece flanged design per API 608 / BS 5351, hydro-tested to API 598.
From INR 12,500 (1/2" Class 150, ex-works, budgetary)
3" Class 150 RF reference: INR 42,000. Firm price on RFQ with size, class and seat.
Why specify a NAB ball valve
NAB (Nickel Aluminium Bronze) is the established body material for continuous seawater and stagnant seawater service. Compared with carbon steel coated valves and many austenitic stainless grades, C95800 resists chloride pitting, cavitation erosion and marine biofouling while retaining high mechanical strength. Buyers searching for a NAB ball valve, NiAlBr ball valve or C95800 ball valve are typically specifying marine cooling, ballast, firewater, RO intake or brine lines.
Supreme Valves supplies these valves from Ahmedabad for domestic EPC work and GCC / marine export, with EN 10204 3.1 material certificates and API 598 test reports on request.
Materials of construction
| Component | Standard material | Options |
|---|---|---|
| Body & end piece | ASTM B148 C95800 (NAB / NiAlBr) | C95500 on request |
| Ball | SS316 (AISI 316), solid, polished | NAB ball / Duplex |
| Stem | SS316, anti-blow-out | Monel 400 / K500 |
| Seat & seals | PTFE / RPTFE | Viton, PEEK, metal seat |
| Bolting | SS316 | Monel bolting for seawater |
Technical specifications
| Parameter | Specification |
|---|---|
| Valve type | Two-piece split body ball valve, full bore, floating ball |
| Size range | 1/2" to 6" (DN15–DN150) standard; larger on enquiry |
| Pressure class | Class 150 / 300 / 600 (ASME B16.34) |
| Ends | Flanged RF / FF ASME B16.5; screwed BSP/NPT; SW / BW on request |
| Design | API 608 / BS 5351; anti-static; anti-blow-out stem |
| Testing | API 598 / EN 12266-1 Rate A |
| Temperature | −20 °C to +200 °C (PTFE seat) |
| Operation | Lever, locking lever, gear, pneumatic or electric actuator (ISO 5211) |
Class 150 flanged — indicative dimensions
Approximate ASME B16.10 / B16.5 Class 150 RF pattern. Certified GAD issued after order.
| Size | DN | L (mm) | Flange OD (mm) | Budgetary ex-works (INR) |
|---|---|---|---|---|
| 1/2" | 15 | 108 | 89 | 12,500 |
| 3/4" | 20 | 117 | 98 | 14,500 |
| 1" | 25 | 127 | 108 | 18,500 |
| 1-1/2" | 40 | 165 | 127 | 25,500 |
| 2" | 50 | 178 | 152 | 32,000 |
| 3" | 80 | 203 | 190 | 42,000 |
| 4" | 100 | 229 | 229 | 68,000 |
| 6" | 150 | 394 | 279 | 1,25,000 |
Prices are budgetary starting points for Class 150 RF, PTFE seat, lever operated, NAB body / SS316 ball & stem. Class 300/600, Monel stem, gear or actuator packages are quoted separately. GST extra on domestic supply.
Applications
- Seawater cooling and heat-exchanger isolation
- Ballast and bilge systems on ships and OSVs
- Desalination plant raw seawater and brine lines
- Offshore platform firewater and utility seawater
- Sodium hypochlorite and chlorinated water dosing
- Coastal power plant circulating water
Documentation with supply
- EN 10204 3.1 material test certificates for pressure-retaining parts
- Hydrostatic shell and seat test report per API 598
- Dimensional / GAD drawing for approval on order
- PMI report for NAB C95800 on request
FAQ — NAB ball valve
What is a NAB ball valve?
A quarter-turn isolation valve with body cast in nickel aluminium bronze ASTM B148 C95800, used where seawater and chlorides attack carbon steel and many stainless grades.
NAB vs NiAlBr — are they the same?
Yes. NAB and NiAlBr both refer to nickel aluminium bronze, most commonly UNS C95800 for marine valves.
Lead time?
Typical manufacturing lead time is 6–8 weeks after PO and advance, depending on size and foundry load. Confirm on each RFQ.
Request a NAB ball valve quote
Send size, pressure class, end connection, seat material, quantity and destination. We reply within one working day with price and delivery.