Selection Standard and Application Analysis for Marine Valve

Choosing the right valves for marine systems is crucial to ensure safety, reliability, and long-term performance in harsh offshore environments. Key selection criteria include:

1.1 Material Selection

Preferred Material: SS316, Duplex Stainless Steel, Bronze

Reason: High corrosion resistance in seawater, brine, and aggressive chemicals

Tip: Avoid carbon steel for exposed or submerged applications

1.2 Valve Type Selection

Valve Type	Typical Marine Application
Butterfly Valve	Ballast systems, cooling water lines
Check Valve	Pump discharge, bilge lines, fire systems
Gate Valve	Seawater intake, cargo pipelines
Globe Valve	Flow regulation in steam or fuel systems
Ball Valve	Quick shut-off for fuel, oil, or air lines

1.3 Standards & Classification

Ensure compliance with IMO, IACS, and classification societies such as:

DNV, ABS, LR, BV, CCS

Check for Fire-Safe, DNV-GL approved, or ISO/ANSI certified valves where required

1.4 Functional Requirements

Operating pressure & temperature

Flow direction and velocity

Manual, pneumatic, or electric actuation

End connection (flanged, wafer, threaded)

2. Application Analysis – Where Marine Valves Are Used

2.1 Engine Room Systems

Seawater cooling lines

Fuel oil, lubricating oil pipelines

Steam and condensate systems

Bilge and ballast systems

 2.2 Deck Systems

Cargo handling valves

Firefighting systems

Air vent check valves for tanks

2.3 Underwater / Hull Applications

Seachests

Overboard discharge valves

Bottom inlet valves

Note: Corrosion resistance and class approval are critical here

3. Additional Recommendations

Use soft-sealing valves (e.g., EPDM-lined butterfly valves) for low-pressure, non-critical lines

Use metal-seated valves for high-temperature or abrasive media

Choose compact wafer-type valves to save space in narrow engine rooms

Plan for easy maintenance access, especially in engine room clusters

Ensure spare part availability for long-term operation at sea

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Please contact us if you need more support, please contact us freely: info@tanghaivalve.com.

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