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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Lug Type Marine Butterfly Valve With Stainless Steel Disc, API 609 Standard

Lug Type Marine Butterfly Valve With Stainless Steel Disc, API 609 Standard

Lug Type Marine Butterfly Valve With Stainless Steel Disc, API 609 Standard thumbnail-3

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Lug Type Marine Butterfly Valve With Stainless Steel Disc, API 609 Standard photo-4

Lug Type Marine Butterfly Valve With Stainless Steel Disc, API 609 Standard photo-5

Product Spotlights

Lug type butterfly valve designed to API 609 standard with a corrosion-resistant stainless steel disc. Ideal for marine and industrial applications, offering bi-directional sealing, low torque operation, and easy installation without disturbing downstream piping. Customizable seat materials and actuator options available.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Standard:

API 609

Application:

Other, Marine

Type:

Lug Type

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Standard API 609

Application Other, Marine

Type Lug Type

Disc Material Stainless Steel

Size Range DN50-DN600 (2“-24“)

Pressure Rating PN10/PN16/Class150

Body Material Ductile Iron, Cast Iron (optional)

Seat Material EPDM, NBR, PTFE (customizable)

Connection Lugged (threaded inserts)

Operation Manual Lever, Gearbox, Actuator (optional)

Shanghai Zhibang Valve Manufacture Co., Ltd. has been a trusted manufacturer of high-performance industrial valves since 2016. Our Lug Type Marine Butterfly Valve with Stainless Steel Disc, designed and tested to API 609 Standard, represents a perfect balance of durability, precision, and cost-efficiency for demanding marine and industrial applications. With an annual export value exceeding US$1 Million, this valve is engineered to deliver reliable shut-off and flow control in seawater, freshwater, and various process media, making it an ideal choice for shipbuilding, offshore platforms, and water treatment systems.

The valve features a stainless steel disc that offers exceptional corrosion resistance and long service life, even in harsh marine environments. Its lug-type body design allows for easy installation between flanges, enabling maintenance without disturbing the downstream piping. Manufactured in our Shanghai facility under strict ISO9001 quality management systems, every valve undergoes rigorous testing to ensure zero leakage and smooth operation.

Key Features & Technical Specifications

Stainless Steel Disc (CF8M/CF8): Resists corrosion, erosion, and pitting, ideal for seawater and chemical service.
API 609 Design: Complies with face-to-face dimensions, pressure-temperature ratings, and testing requirements per API 609 Category A (concentric) or B (double eccentric as per model).
Lug Type Body: Threaded inserts on both flanges allow the valve to be bolted directly to upstream and downstream flanges for dead-end service capability.
Bi-directional Sealing: Provides positive shut-off in both directions, meeting API 598 leakage requirements.
Multiple Seat Options: EPDM (water/wastewater), NBR (oil), PTFE (chemicals) – customizable to your media.
Low Torque Operation: Optimized disc profile reduces operating torque, allowing smaller actuators when automated.
Full Range of Sizes: From DN50 to DN600 (2" to 24") in PN10/PN16 or Class150 pressure ratings.
Various End Connections: Compatible with PN10/PN16/ANSI 150 flanges.

Technical Data Table

Parameter	Value	Parameter	Value
Standard	API 609	Pressure Test	API 598
Disc Material	SS304 / SS316 (CF8/CF8M)	Body Material	Ductile Iron (GGG40/50) or Cast Iron (GG25)
Seat Material	EPDM, NBR, PTFE (optional)	Temperature Range	-20°C to +120°C (EPDM) / -10°C to +80°C (NBR) / -29°C to +200°C (PTFE)
Size Range	DN50 – DN600 (2" – 24")	Pressure Rating	PN10/PN16 / Class150
Operation	Lever, Gearbox, Pneumatic/Electric Actuator (optional)	Leakage	Zero leakage (bi-directional)

Why Choose Our Lug Type Marine Butterfly Valve?

Marine-Grade Reliability: The stainless steel disc and robust construction withstand saltwater, humidity, and temperature fluctuations common in shipboard systems.
Easy Installation & Maintenance: Lug design allows removal of the valve without draining the entire pipeline – a significant time-saver during maintenance.
Cost-Effective Solution: Compared to gate or globe valves, butterfly valves offer lower initial cost, lighter weight, and faster operation.
Customizable Options: We offer different disc materials (SS316, SS304), seat elastomers, gear operators, and actuator mounting kits to match your specific requirements.
Global Compliance: API 609 standard ensures interchangeability with other manufacturers’ valves, and our products are accepted in North America, Europe, Southeast Asia, Africa, and Oceania markets.

Trusted by Industries Worldwide – Shanghai Zhibang Valve has exported over US$1 Million annually to more than 15 countries and regions. Our ISO9001-certified production line ensures consistent quality, and our experienced team provides technical support from selection to after-sales. Whether you need standard valves or custom solutions, we guarantee reliable delivery from our ports in Shanghai, Guangzhou, Hong Kong, or Beijing.

Contact us today for a quotation or technical datasheet. We are ready to help you optimize your fluid control system with a valve that combines API 609 compliance, stainless steel durability, and marine-specific design. Let Shanghai Zhibang be your partner for safe, efficient, and long-lasting valve solutions.

Frequently Asked Questions

Q: What does "lug type" mean for a butterfly valve?
A: Lug type butterfly valves have threaded inserts (lugs) on both flange faces, allowing them to be bolted directly to the pipe flanges. This design enables the valve to be removed from the pipeline without disturbing the downstream piping and supports dead-end service (rated pressure on one side).
Q: Is this valve suitable for seawater applications?
A: Yes, the stainless steel disc (e.g., CF8M) provides excellent corrosion resistance in seawater and brackish water. Combined with an EPDM seat, it is widely used in marine ballast systems, cooling water lines, and fire-fighting systems.
Q: What is API 609 standard?
A: API 609 is the American Petroleum Institute standard for butterfly valves. It covers design, face-to-face dimensions, pressure-temperature ratings, materials, and testing requirements. Our valve complies with API 609 Category A (concentric) or B (double eccentric), depending on the specific model ordered.
Q: Can I get this valve with a pneumatic actuator?
A: Yes, we offer actuator mounting kits and can supply pneumatic, electric, or hydraulic actuators. Please provide your required torque and control type (on/off, modulating) for a complete package.
Q: What sizes and pressure ratings are available?
A: Standard sizes range from DN50 to DN600 (2" to 24"), with pressure ratings of PN10/PN16 and Class150. Larger sizes or higher pressure ratings can be customized upon request.
Q: How do I confirm the seat material for my media?
A: Common media recommendations:
– Water / seawater: EPDM
– Oil / fuel: NBR
– Chemicals / high temperature: PTFE.
Our technical team can assist you in selecting the optimal seat elastomer based on your fluid temperature and chemical compatibility.
Q: Does the valve come with a certification?
A: Our valves are manufactured under an ISO9001 quality management system. We can provide Material Test Reports (MTR), pressure test certificates, and a certificate of conformity. API 609 compliance is guaranteed by design. Third-party inspection (e.g., by Bureau Veritas, DNV) is available at additional cost.
Q: What is the lead time for this valve?
A: For standard sizes and materials, lead time is typically 15-25 working days after order confirmation. Custom orders may require 30-40 working days. We ship from Shanghai, Guangzhou, Hong Kong, or Beijing.