What is a NAB ball valve?

A NAB ball valve is a ball valve with body, ball, and end connectors made from Nickel Aluminium Bronze (NAB), specifically ASTM B148 C95800. The stem is typically stainless steel 316 and seats are PTFE. NAB ball valves provide excellent seawater corrosion resistance and are used in marine, desalination, and offshore applications.

What is the difference between NAB and bronze ball valves?

NAB (Nickel Aluminium Bronze) ball valves have superior corrosion resistance compared to standard bronze (gunmetal) ball valves. NAB contains aluminium and nickel which form a protective oxide layer, providing better resistance to seawater, erosion, and biofouling. NAB has higher tensile strength (585 MPa vs 240 MPa for bronze) and is preferred for critical seawater applications.

What sizes are NAB ball valves available in?

NAB ball valves are available in sizes from 1/2 inch (DN15) to 6 inch (DN150) in 2-piece design. Common sizes include 1/2", 1", 2", and 3". End connections include screwed (BSP/NPT) and flanged (ASME B16.5). Larger sizes up to 12 inch available in 3-piece or trunnion mounted design.

What is the value of NAB ball valve?

NAB ball valve prices in NOT_SHOWN: 1/2" costs approximately ₹12,089, 1" costs ₹18,788, 2" costs ₹29,799, and 3" costs ₹62,887. Prices are from factory India and include hydrostatic testing and EN 10204 3.1 material certificates. Contact Supreme Valves for confirmed pricing and volume discounts.

Seawater Service

NAB Ball Valve – API 6D for Seawater

Name: NAB Ball Valve API 6D for Seawater Service
Brand: Supreme Valves
SKU: SV-NABBALLVALVEAPI6DSEA
Availability: InStock
Rating: 4.8 (127 reviews)

Nickel Aluminium Bronze (NAB) ball valves manufactured to API 6D / BS 5351 standard for continuous seawater service. Body and ball in ASTM B148 C95800. 2-piece split body design. PTFE seats. Sizes from 1/2" to 6". Ideal for desalination, offshore, and marine applications.

Quick Summary

NAB Ball Valve = Ball valve with body and ball made from Nickel Aluminium Bronze (ASTM B148 C95800). 2-piece split body design per API 6D. PTFE soft seats. Used for seawater isolation. Available 1/2" to 6". Manual lever or gear operated. Applications: desalination, offshore platforms, marine vessels, seawater cooling.

NAB Ball Valve API 6D Nickel Aluminium Bronze C95800 Seawater

In Stock Seawater Rated

Key Specifications

Design Standard: API 6D / BS 5351

Pressure Rating: PN16 / Class 150

Body Material: ASTM B148 C95800

Ball Material: ASTM B148 C95800

Seat Material: PTFE

Size Range: 1/2" to 6"

Construction: 2-Piece Split Body

Leakage Class: Class VI (Zero)

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Materials of Construction (MOC)

Component	Material Specification
Body & Bonnet	Nickel Aluminum Bronze (ASTM B148 C95800)
Stem / Spindle	Monel 400 / K500
Seat / Trim	NAB / PTFE / Viton

Technical Specifications

Parameter	Specification / Standard
Manufacturing / Design Standard	API 609 / API 600 / ASME B16.34
Testing Standard	API 598 / EN 12266-1
Pressure Rating	Class 150 / Class 300 / PN16

Materials of Construction (MOC)

Part Name	Material
Body & Bonnet	Cast Iron (IS 210 Gr. FG 200)
Stem / Spindle	Stainless Steel (AISI 410)
Seat / Trim	Bronze (IS 318 LTB 2) or SS 410
Gland Packing	Graphite / PTFE (Application Dependent)
Handwheel / Actuator	Cast Iron / Steel / SG Iron