ABS Type Approved Marine and Naval Valves

From commercial and naval ships to offshore platforms, marine valves are essential components in all types of vessels and structures. They control the flow of liquids and gases for critical systems operating in the demands of a saltwater environment.

All Williams Valves are designed, engineered, manufactured, and tested to meet or

exceed all applicable industry standards including ASTM, ASME, and MSS. We also are an ABS Type Approved manufacturer for several standard marine valves, including:

• Cast Steel Marine T-Pat & Angle Globe
• Bronze Marine T-Pat & Angle Globe
• Marine Swing Check

At Williams Valve, we are one of the few US companies ready and willing to customize valve solutions for your unique needs. Whether your needs are for standard products from our well-stocked inventories or custom parts for modifications, contact our team today.

Key Design Challenges for Marine Valves

Whether for commercial shipbuilding, naval shipbuilding, or other military/defense uses, these types of valves face unique challenges that differentiate them from their land-based counterparts.

• Corrosion Resistance
  The most significant challenge in the marine environment is corrosion, primarily from seawater. Valves exposed to saltwater must be constructed from highly corrosion-resistant materials. Stainless steels, alloys, and bronze are common. For MilSpec projects, materials like Monel, Titanium, and specific high-strength, corrosion-resistant stainless steels are often mandated.
• Shock and Vibration
  Ships, especially naval vessels, are constantly subjected to dynamic forces from engine vibrations, wave action, and in military applications, shock from explosions or weapon firing. Valves must be designed and tested to withstand these forces without leakage or failure. US Navy standards like MIL-S-901 (for high-impact shock) and MIL-STD-167 (for mechanical vibration) involve rigorous testing, including hammer blows for shock and sustained shaking for vibration.
• Pressure and Temperature Extremes
  Marine systems can involve a wide range of pressures and temperatures, from cryogenic LNG systems to high-temperature steam lines in propulsion systems. Valves must maintain integrity across these extreme variances.
• Fire Safety
  For fuel lines, cargo lines, and systems handling flammable materials, valves must be fire-safe,” meaning they can maintain their sealing integrity for a specified period when exposed to fire. This is typically tested to standards like ISO 10497 or API 607.
• Space and Weight Constraints
  Ships have finite space and strict weight limitations. Compact and lightweight valve designs are often preferred, especially in confined areas like engine rooms or submarines. Wafer-style valves such as swing check are common for this reason.
• Reliability and Maintainability
  Downtime at sea can be costly and dangerous. Marine valves must be highly reliable and, where possible, designed for easy in-situ maintenance and repair.