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Shipbuilding and Offshore Platform Seawater Valve, GB/T3036 Marine Butterfly Valve With EPDM Seal
Product Spotlights
GB/T3036 standard marine butterfly valve featuring a durable EPDM seal for superior seawater corrosion resistance. Ideal for shipbuilding and offshore platform seawater, ballast, and cooling systems. Offers bidirectional sealing, low torque operation, and configurations with lever, gear, or actuator options. Manufactured under ISO 9001 with materials like ductile iron or stainless steel for reliability and long service life in harsh maritime environments.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
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Standard:
GB/T 3036, ISO 9001 manufacturing process
Application:
Other, Seawater
Material:
Ductile Iron, Stainless Steel (optional)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Standard
GB/T 3036, ISO 9001 manufacturing process
Application
Other, Seawater
Material
Ductile Iron, Stainless Steel (optional)
Seat Seal Material
EPDM (Ethylene Propylene Diene Monomer)
Connection Type
Wafer or Lug style
Operation Type
Lever, Gearbox, or Actuator (optional)
Nominal Diameter (DN)
DN50 to DN1200 (customizable)
Nominal Pressure (PN)
PN10, PN16, PN25
Suitable Media
Seawater, fresh water, air, weak corrosive fluids
Temperature Range
-15°C to +120°C (with EPDM seal)
As a professional valve manufacturer with ISO 9001 certified production systems, Shanghai Zhibang Valve is dedicated to providing robust and reliable fluid control solutions for demanding maritime and offshore applications. Our GB/T3036 Marine Butterfly Valve with EPDM Seal is engineered specifically for seawater service in shipbuilding and offshore platform environments. This valve combines a durable body construction with a superior EPDM sealing system, offering excellent corrosion resistance, long service life, and dependable shut-off, making it a critical component for safe and efficient vessel and platform operation.
Designed to meet the rigorous standards of marine engineering, this butterfly valve excels in handling seawater, ballast water, cooling water, and other onboard fluid systems. Its compact design and quarter-turn operation allow for quick and easy installation, maintenance, and flow control, even in confined spaces typical of ship engine rooms and offshore structures. We understand that valve failure in such critical applications is not an option, which is why every valve undergoes stringent quality checks to ensure it performs under pressure, salinity, and variable operational conditions.
Key Product Features & Technical Advantages:
- Superior Seawater Corrosion Resistance: The key to this valve's performance in seawater is the EPDM (Ethylene Propylene Diene Monomer) elastomer seat. EPDM is renowned for its excellent resistance to seawater, ozone, weathering, and a wide range of chemicals, ensuring the seal remains flexible and effective over extended periods, preventing leaks and valve failure.
- Robust Construction & Compliance: The valve body is manufactured to the Chinese national standard GB/T 3036, ensuring dimensional accuracy, pressure integrity, and interchangeability. Standard body materials include ductile iron with epoxy coating or stainless steel upon request, providing strength and additional corrosion protection.
- Bidirectional Sealing & Low Torque Operation: The valve design ensures bidirectional sealing capability, meaning it holds pressure from both flow directions. The disc profile and seat design are optimized to minimize operating torque, reducing wear on the stem and actuator and allowing for smoother manual or automated operation.
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Versatile Operation & Configuration: Available with various operation methods to suit different system requirements:
- Lever Handle: For manual operation in easily accessible locations.
- Worm Gear Operator: Provides mechanical advantage for larger valve sizes (DN300 and above) or higher pressure applications, allowing for easier manual operation.
- Pneumatic or Electric Actuator: For remote, automated control integration into ship or platform control systems. (Available upon request).
- Wide Application Range: This valve is not limited to seawater. Its EPDM seal and robust construction make it suitable for a variety of media on ships and offshore platforms, including fresh water, compressed air, lubricating oils, and other weak corrosive fluids within its temperature range.
Detailed Technical Specifications:
The following table outlines the core specifications for our standard range of Marine Butterfly Valves. Custom specifications for dimensions, pressures, or materials can be discussed based on your project requirements.
| Parameter | Specification / Range |
| Design & Manufacturing Standard | GB/T 3036 |
| Nominal Diameter (DN) | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN500, DN600, DN800, DN1000, DN1200 |
| Nominal Pressure (PN) | PN10, PN16, PN25 |
| Body Material | Ductile Iron (epoxy coated), Cast Steel, Stainless Steel (304/316) |
| Disc Material | Ductile Iron (Ni-plated or epoxy coated), Stainless Steel, Aluminum Bronze |
| Stem Material | Stainless Steel (410/304/316) |
| Seat Seal Material | EPDM (Standard), NBR, Viton® (Optional) |
| Temperature Range (with EPDM) | -15°C to +120°C |
| Connection Type | Wafer, Lug, Double Flange |
| Operation Type | Lever, Worm Gear, Pneumatic Actuator, Electric Actuator |
| Flow Characteristic | Approximately equal percentage |
Benefits for Our Clients:
- Enhanced System Reliability: Reduces the risk of in-service failure, minimizing downtime and costly repairs for ships and offshore platforms.
- Reduced Maintenance Costs: The durability of the EPDM seal and corrosion-resistant materials lead to longer maintenance intervals and lower lifecycle costs.
- Simplified Inventory & Sourcing: Compliance with GB/T 3036 ensures compatibility with many existing systems. As a manufacturer, we offer flexible production to meet specific batch requirements.
- Operational Safety: Reliable sealing ensures controlled fluid handling, contributing to the overall safety of maritime operations and personnel.
With an annual export value ranging between US$1 Million and US$1.5 Million, Shanghai Zhibang Valve has established a strong global presence, supplying high-quality valves to markets across North and South America, Europe, Asia, Africa, and Oceania. Our products are shipped from major ports like Shanghai, Guangzhou, and Hong Kong, ensuring efficient logistics for our international clients. Our ISO 9001 certification is a testament to our commitment to consistent quality in every valve we produce. When you choose our Marine Butterfly Valve, you are not just buying a component; you are investing in a reliable solution backed by manufacturing expertise and a proven track record in serving the global marine industry. Contact us today to discuss your specific requirements or to request a detailed quotation.
Frequently Asked Questions (FAQ):
-
Q: Is this butterfly valve suitable for full seawater immersion or just seawater flow?
A: The valve is designed for handling flowing seawater within pipelines. While the materials (especially with epoxy coating or stainless steel) offer good corrosion resistance, prolonged full immersion in seawater, particularly for the operating mechanism, may require additional protection or specific material grades. Please consult our engineers for submerged service applications. -
Q: Can you provide valves with different seal materials other than EPDM?
A: Yes. While EPDM is our standard and recommended material for seawater due to its balanced properties, we can offer alternative elastomers like NBR (Nitrile) for oil-based fluids or FKM (Viton®) for higher temperature or more aggressive chemical services upon request. -
Q: What is the delivery lead time for a standard DN200, PN16 valve?
A: For standard configurations, we typically maintain stock or can produce with a lead time of 4-6 weeks. Lead times may vary based on order quantity, specific material choices, and operation type. We provide accurate timelines upon order confirmation. -
Q: Do you offer actuated versions of this valve for automated control systems?
A: Absolutely. We can supply the valve fitted with pneumatic (on/off or modulating) or electric actuators. We work with reputable actuator brands and can provide complete, assembled, and tested packages ready for installation. -
Q: How does the GB/T 3036 standard compare to other international standards like ISO 5752 or API 609?
A: GB/T 3036 is a widely recognized Chinese national standard for metal-seated butterfly valves that specifies dimensions, pressure ratings, and testing requirements. It is broadly compatible with ISO standards in terms of face-to-face dimensions for many sizes, facilitating interchangeability. For projects requiring specific API or other certifications, please inquire as custom manufacturing is possible. -
Q: What kind of testing do these valves undergo before shipment?
A: Each valve undergoes a standard shell test and a seat leakage test (typically using air or water) per the requirements of GB/T 3036. Additional testing, such as a more stringent seat test or full documentation, can be arranged as per customer specifications. -
Q: Can you provide custom painting or coating as per our specifications?
A: Yes. Standard valves feature an epoxy coating for corrosion protection. We can accommodate custom paint colors, thicknesses, or specific coating systems (e.g., zinc plating, powder coating) based on your technical specifications or corporate standards. -
Q: What are the packaging options for ocean freight to prevent damage and corrosion during transit?
A: We use robust export-grade packaging. Valves are typically protected with VCI (Vapor Corrosion Inhibitor) paper or bags, wrapped in plastic, and secured in strong wooden crates or plywood boxes to withstand long-distance sea transport and handling.
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1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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