What is API 623 globe valve?

API 623 is the American Petroleum Institute standard for steel and alloy globe valves for petroleum and natural gas industries. It covers design, materials, testing, and marking requirements. API 623 globe valves are used for throttling and flow regulation where precise control is needed. They feature a linear flow characteristic and are available in bolted bonnet and pressure seal designs.

Why use NAB globe valves for seawater?

NAB (Nickel Aluminium Bronze) globe valves are ideal for seawater throttling because: (1) Excellent corrosion resistance to seawater and chlorides, (2) Superior erosion resistance in high-velocity flow, (3) Anti-biofouling properties, (4) Maintains precise throttling control over long service life, (5) Self-healing oxide layer protects against pitting.

What is the difference between gate valve and globe valve?

Gate valves are for on/off isolation with minimal pressure drop when fully open. Globe valves are for throttling and flow control with higher pressure drop. Globe valves have a disc that moves perpendicular to the flow, allowing precise flow regulation. Gate valves have a wedge that moves parallel to flow. For seawater systems, use gate valves for isolation and globe valves for flow control.

What sizes are NAB globe valves available in?

NAB globe valves per API 623 are available from 1/2 inch (DN15) to 12 inch (DN300). Common sizes for seawater service include 3 inch and 8 inch. Smaller sizes are handwheel operated, larger sizes (6 inch and above) are typically gear operated. Flanged ends per ASME B16.5 Class 150.

Throttling Service

NAB Globe Valve – API 623 for Seawater

Name: NAB Globe Valve API 623 for Seawater Service
Brand: Supreme Valves
SKU: SV-NABGLOBEVALVEAPI623S
Availability: InStock
Rating: 4.8 (127 reviews)

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 (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