Throttling Service

NAB Globe Valve – API 623 for Seawater

Nickel Aluminium Bronze (NAB) globe valves manufactured to API 623 standard for throttling and flow control in seawater service. Body material ASTM B148 C95800. Class 150. Sizes from 1/2" to 12". Manual handwheel or gear operated. Ideal for desalination, offshore, and marine flow regulation.

Quick Summary

NAB Globe Valve = Globe valve for throttling/flow control made from Nickel Aluminium Bronze (ASTM B148 C95800). API 623 design. Used when you need to regulate flow in seawater systems (not just on/off). Available 3" to 8" commonly. Handwheel for small sizes, gear operator for 6"+ sizes. Applications: desalination flow control, seawater cooling regulation, marine systems.

NAB Globe Valve API 623 Nickel Aluminium Bronze C95800 Seawater Throttling
In Stock Throttling

Key Specifications

Design Standard: API 623
Pressure Class: 150 (PN20)
Body/Bonnet: ASTM B148 C95800
Disc/Wedge: NAB
Stem: Super Duplex S32760
Size Range: 1/2" to 12"
End Connection: Flanged ASME B16.5
Operation: Handwheel / Gear
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Materials of Construction

Component Material
Body / BonnetASTM B148 Gr. C95800 (Nickel Aluminium Bronze)
Disc / WedgeNickel Aluminium Bronze
StemUNS S32760 (Super Duplex Stainless Steel)
Gland PackingGraphite
GasketSpiral Wound – Graphite Filler
BoltingASTM A193 / A194
EndsANSI Class 150 Flanged
OperationManual Handwheel / Gear Operated

Globe Valve vs Gate Valve – When to Use

Feature Globe Valve (API 623) Gate Valve (API 600)
Primary UseThrottling / Flow ControlOn/Off Isolation
Pressure DropHigher (S-path flow)Lower (straight flow)
Flow ControlExcellentPoor (not recommended)
SealingGoodExcellent
Seawater UseFlow regulationIsolation

Frequently Asked Questions

What is API 623 globe valve?

API 623 is the standard for steel and alloy globe valves for petroleum and natural gas industries. It covers design, materials, testing, and marking. API 623 globe valves are used for throttling and flow regulation where precise control is needed.

Why use NAB globe valves for seawater?

NAB globe valves are ideal for seawater throttling because of excellent corrosion resistance, superior erosion resistance in high-velocity flow, anti-biofouling properties, and maintained precise throttling control over long service life.

What is the difference between gate valve and globe valve?

Gate valves are for on/off isolation with minimal pressure drop. Globe valves are for throttling and flow control with higher pressure drop. For seawater systems, use gate valves for isolation and globe valves for flow control.

Need NAB Globe Valves for Flow Control?

We supply to major EPC contractors. EN 10204 3.1 MTCs. Third-party inspection available.

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Pricing – Globe Valve (Class 150)

Indicative unit prices in INR (ex-works India). Includes hydrostatic testing and EN 10204 3.1 MTCs. Volume discounts available for project quantities.

Size Standard Operation Material Unit Price (INR)
3" API 623 Manual ASTM B148 C95800 (NAB) ₹71,401
8" API 623 Gear Operated ASTM B148 C95800 (NAB) ₹2,51,383

* Prices are indicative and subject to change. Contact us for confirmed pricing and delivery schedules. GST extra as applicable.