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Help CenterMarine Stainless Steel Double Eccentric LUG Butterfly Valve With Certificates From Major Classification Societies
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Marine Stainless Steel Double Eccentric LUG Butterfly Valve
Product Overview
The Marine Stainless Steel Double Eccentric LUG Butterfly Valve is engineered to deliver superior performance, reliability, and longevity in the most demanding marine and offshore piping systems. Specifically designed to handle corrosive media such as seawater, brine, and chemical solutions, this valve is an optimal choice for critical applications where leak-tight shut-off and exceptional corrosion resistance are paramount.
Constructed from premium-grade stainless steel and featuring a robust lug-style body design, this valve provides a secure, bolted connection that allows for easy installation and removal without disturbing the entire pipeline. The double eccentric (double-offset) disc design dramatically reduces seat wear during operation, ensuring a longer service life and reliable, bubble-tight sealing. It is fully certified by all major international classification societies, guaranteeing compliance with the strictest marine safety and quality standards.
Key Features & Advantages
Superior Corrosion Resistance: Manufactured from high-grade stainless steel (such as CF8M/316, CF3M/316L, Duplex 2205, Super Duplex), offering outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-rich marine environments.
Double Eccentric Design: The offset shaft and conical disc seat geometry minimize friction and wear between the disc and seat during opening and closing cycles. This design ensures prolonged seat life, lower operating torque, and reliable sealing performance over thousands of cycles.
Lug-Style Body Design: Features threaded inserts or through-holes on both sides, allowing it to be installed as a dead-end service valve or sandwiched between two pipe flanges. This provides exceptional flexibility for system isolation, maintenance, and piping design.
Bubble-Tight Sealing: Utilizes advanced metal-seated or resilient-seated designs (PTFE, EPDM, HNBR) to achieve zero-leakage performance, meeting stringent classification requirements for both internal and external sealing integrity.
Robust & Low Maintenance: The simple yet robust construction ensures high structural strength to withstand pipeline stresses, vibration, and shock. Requires minimal maintenance, reducing total cost of ownership.
Bi-Directional Sealing: Capable of providing effective shut-off against pressure from both flow directions, depending on the seat material and design configuration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Valve Type | Double Eccentric (Double Offset), Lug Style |
| Size Range | DN 50 to DN 1200 (2" to 48") |
| Pressure Rating | PN 10/16/25/40, Class 150/300 (Standard up to Class 300) |
| Temperature Range | Standard: -29°C to +200°C (varies with seat material) |
| Body Material | ASTM A351 CF8M (316), CF3M (316L), Duplex & Super Duplex Stainless Steel, WCB Carbon Steel (epoxy coated) |
| Disc Material | Same as body material, often with superior surface hardening or coating (e.g., Stellite, Ni-Cr alloy, epoxy) |
| Stem Material | Stainless Steel (17-4PH, 416, 431), Monel, with high strength and corrosion resistance |
| Seat Material | Resilient: PTFE, Reinforced PTFE, EPDM, HNBR, FKM / Metal: Stainless Steel, Super Duplex |
| Operation | Manual (Lever, Gear), Electric Actuator, Pneumatic Actuator, Hydraulic Actuator |
| End Connection | Lug type with drilled holes per ANSI/ASME B16.5, ISO 5752, or EN 1092 standards |
| Face-to-Face | Compliant with ISO 5752 Series 20, ASME B16.10, EN 558-1 |
| Design & Test Standards | API 609, ISO 10631, BS EN 593, API 598 |
Typical Marine Applications
Seawater Cooling Systems: Main and auxiliary cooling water lines.
Firefighting Systems: Seawater and sprinkler lines.
Ballast Water Systems: Ballast water handling and treatment lines.
Bilge & Drain Systems: Bilge water collection and overboard discharge lines.
Fresh Water & Sanitary Systems: Potable water, sanitary, and grey water lines.
Chemical Service: Chemical dosing, tank cleaning, and scrubber (EGCS) systems.
General Service: Various utility and service lines throughout the vessel.
Certifications & Classification Society Approvals
Our Marine Stainless Steel Double Eccentric LUG Butterfly Valves are designed, manufactured, and tested in full compliance with international marine regulations. We hold full Type Approval Certificates from the following major classification societies, ensuring global acceptance for your projects:
ABS (American Bureau of Shipping)
BV (Bureau Veritas)
DNV (Det Norske Veritas)
LR (Lloyd's Register)
CCS (China Classification Society)
NK (Nippon Kaiji Kyokai)
RINA (Registro Italiano Navale)
KR (Korean Register of Shipping)
Additional Certifications:
CE Marking (PED 2014/68/EU)
API 609 Monogram (where applicable)
ISO 9001:2015 Quality Management System
Fire Safe Design compliant with API 607/API 6FA, ISO 10497
Conclusion
This valve represents a perfect synergy of advanced engineering, premium corrosion-resistant materials, and rigorous quality certification. It is the trusted solution for naval architects, shipyards, and ship operators who demand uncompromising performance, safety, and durability for their fluid handling systems.
For further technical details, specific material selection guidance, or certification documentation, please contact our marine sales department.
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