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Home > Industrial Equipment & Components > Valve > Butterfly Valve > GB/T3036-94 Marine Semi-Lug Butterfly Valve With 316 Stainless Steel Disc

GB/T3036-94 Marine Semi-Lug Butterfly Valve With 316 Stainless Steel Disc

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GB/T3036-94 Marine Semi-Lug Butterfly Valve With 316 Stainless Steel Disc photo-5

Product Spotlights

Marine-grade butterfly valve featuring a semi-lug body for secure dead-end service and easy maintenance. The 316 stainless steel disc provides exceptional corrosion resistance in seawater and harsh environments. Manufactured to GB/T3036-94 standard, it offers reliable performance for ballast, cooling, and firefighting systems on ships and offshore platforms.

Negotiable MOQ: 10 Units (Price negotiable depending on order volume and customization)

Key Specifications

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Standard:

GB/T3036-94

Application:

Other, Marine and Shipbuilding

Body Type:

Semi Lug

Contact Supplier Request Quote Chat Now

Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

shanghai

Delivery Detail:

7 days

Product Details
Company Profile
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Standard GB/T3036-94

Application Other, Marine and Shipbuilding

Body Type Semi Lug

Disc Material 316 Stainless Steel

Connection Type Wafer or Lug

Seat Material EPDM or PTFE

Operation Lever, Gear, or Actuator

Size Range DN50 to DN600

Pressure Rating PN10 to PN16

As a leading manufacturer with ISO9001 certification, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in producing high-performance industrial valves for global markets. We are proud to introduce our GB/T3036-94 Marine Semi-Lug Butterfly Valve with 316 Stainless Steel Disc, engineered specifically to withstand the demanding conditions of marine and offshore applications. Our commitment to quality and precision manufacturing since 2016 ensures that every valve delivers reliable shut-off and flow control, contributing to the safety and efficiency of your maritime operations. With an annual export value reflecting our global reach, this valve is a trusted component for shipbuilders, port operators, and marine engineers worldwide.

This marine-grade butterfly valve is designed for durability and long service life in saltwater and corrosive environments. The semi-lug body design provides a robust connection that is easier to install and maintain compared to traditional wafer valves, especially in systems requiring frequent disconnection of piping. The 316 stainless steel disc offers superior corrosion resistance against chlorides and other aggressive media commonly found in marine settings.

Key Features and Technical Advantages:

Superior Corrosion Resistance: The core component, the disc, is crafted from 316 stainless steel. This material contains molybdenum, which significantly enhances its pitting and crevice corrosion resistance in chloride-laden environments like seawater, making it far more durable than standard 304 stainless steel.
Robust Semi-Lug Design: The valve body features integral lugs on one side of the flange. This design allows the valve to be installed using bolts that pass through the lugs and the pipe flange on one side, while the other side is a standard wafer style. This offers a secure, dead-end service capability and simplifies installation and removal for maintenance without needing to disassemble the entire pipeline.
Compliant Performance: Manufactured in strict accordance with the Chinese national standard GB/T3036-94, this valve meets specific dimensional, performance, and testing requirements for butterfly valves, ensuring interchangeability and reliable performance in industrial systems.
Versatile Sealing Options: Available with various elastomer seat materials such as EPDM (for general water service) or PTFE/Viton (for higher temperatures and chemical resistance). The seat provides a bubble-tight seal, minimizing leakage and ensuring efficient flow control.
Multiple Actuation Methods: The valve can be operated manually via a lever lock or a gearbox for larger sizes, or it can be automated with pneumatic or electric actuators for remote control and integration into automated systems.
Low Torque Operation: The streamlined 316 SS disc design and high-quality bearings ensure smooth, low-friction operation, reducing the effort required for manual actuation and extending the life of automated actuators.

Technical Specifications (Typical Range):

Parameter	Specification
Standard	GB/T3036-94
Body Type	Semi Lug
Disc Material	316 Stainless Steel (CF8M)
Body Material	Ductile Iron, Carbon Steel, 316 SS (Optional)
Seat Material	EPDM, NBR, PTFE, Viton (Customizable)
Stem Material	416 or 304 Stainless Steel
Size Range (DN)	50, 65, 80, 100, 125, 150, 200, 250, 300, 350, 400, 450, 500, 600
Pressure Rating (PN)	10, 16
Temperature Range	-10°C to +120°C (with EPDM seat), up to +200°C (with PTFE seat)
Connection Standard	Flange dimensions per GB, ANSI, JIS, DIN (Available upon request)
Operation	Lever, Worm Gear, Pneumatic Actuator, Electric Actuator

Benefits for Your Operations:

Enhanced System Reliability: The combination of a corrosion-resistant disc and a robust semi-lug body minimizes the risk of valve failure, reducing unplanned downtime and maintenance costs in critical marine systems like ballast, cooling, firefighting, and bilge lines.
Simplified Maintenance: The semi-lug design allows for easier removal of the valve for inspection or seat replacement without dismantling the entire pipeline section, saving significant time and labor.
Cost-Effective Solution: Compared to full lug valves, the semi-lug design offers a balance of performance and cost, providing dead-end service capability where needed while remaining an economical choice.
Global Compatibility: While built to GB standard, the valve can be configured with flange facings to match ANSI, DIN, or JIS standards, ensuring easy integration into both new builds and retrofit projects worldwide.

Shanghai Zhibang Valve has established a strong reputation by exporting to diverse markets across North America, South America, Europe, Asia, Africa, and Oceania. Our ISO9001-certified manufacturing processes guarantee consistent quality, and our strategic shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing ensure efficient and flexible logistics for your orders. Choosing our GB/T3036-94 Marine Semi-Lug Valve means partnering with a reliable manufacturer dedicated to providing durable, high-performance fluid control solutions. Contact us today to discuss your specific requirements, request a detailed quotation, or learn more about our full valve portfolio.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a semi-lug design over a standard wafer butterfly valve?
A: A semi-lug valve has threaded inserts (lugs) on one flange face. This allows it to be bolted directly to a flange on that side, providing a secure connection for dead-end service or for easier installation/removal. A standard wafer valve relies on flange bolts squeezing it between two pipe flanges and cannot be used for dead-end service.
Q: Can this valve be used with seawater?
A: Yes, the 316 stainless steel disc offers excellent resistance to chloride corrosion, making it suitable for seawater applications. For optimal service life, specifying a compatible seat material like EPDM or PTFE is also important.
Q: What flange standards are available?
A: The standard offering complies with Chinese GB flange dimensions. However, we can provide valves with ANSI, DIN, or JIS standard flange facings upon request to match your existing pipeline specifications.
Q: Is this valve suitable for throttling flow control?
A: While butterfly valves can be used for throttling, their flow characteristics are best suited for on/off service or rough throttling. For precise flow control, we recommend discussing your application with our engineers, as alternative trim or different valve types might be more suitable.
Q: What types of actuators can be fitted?
A> The valve is designed to be compatible with a wide range of actuators. We can supply it as a manual unit (lever or gear) or pre-assembled with pneumatic (double-acting or spring-return) or electric actuators. The mounting interface is standardized (ISO 5211).
Q: What is the lead time for an order?
A: Lead time depends on the order quantity, size, and material specifications. Standard configurations typically have shorter lead times. We provide estimated lead times with every quotation and strive to meet our customers' project schedules.
Q: Do you provide pressure test certificates?
A: Yes, as part of our ISO9001 quality system, each valve undergoes hydrostatic shell and seat tests. A standard test certificate can be provided with the shipment. More detailed inspection reports (e.g., 3.1 material certificates) are available upon request.
Q: Can you customize the valve with different materials or special coatings?
A: Absolutely. We offer customization options, including different body materials (e.g., full 316 SS body), special epoxy coatings for extra corrosion protection, extended stems, and other modifications to meet unique project requirements.