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Help CenterLever/Gear Operated GB/T3036-94 Marine Wafer Butterfly Valve for Ship Seawater Systems DN50-DN600
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Shanghai Zhibang Valve Manufacture Co., Ltd., an ISO9001-certified manufacturer established in 2016, specializes in producing robust and reliable valves for demanding marine applications. Our Lever/Gear Operated GB/T3036-94 Marine Wafer Butterfly Valve is engineered specifically for ship seawater systems, offering a durable and efficient solution for flow control in harsh oceanic environments. With an annual export value reflecting our global reach across markets from North America to Southeast Asia, we deliver valves that combine stringent Chinese national standards with practical design for easy installation and maintenance.
This valve is designed to meet the rigorous demands of marine seawater systems, where corrosion resistance and reliable operation are critical.
- Compact Wafer Design: The wafer-style body allows for installation between two flanges without requiring additional nuts or bolts on the valve itself, saving space and reducing overall weight in ship piping systems.
- Dual Operation Flexibility: Available with either a simple lever handle for quick manual operation or a gear operator for more precise control and reduced operating torque, suitable for larger sizes or higher-pressure applications.
- Broad Size Compatibility: Covers a comprehensive range from DN50 to DN600, ensuring availability for various pipeline diameters within a vessel's seawater cooling, ballast, or fire-fighting systems.
- Corrosion-Resistant Materials: Key components are typically crafted from materials like cast iron with protective coatings, stainless steel, or bronze to withstand the corrosive effects of seawater.
- Reliable Sealing: Utilizes elastomeric seals (such as EPDM or Nitrile rubber) or PTFE for tight shut-off and long service life, resisting degradation from seawater and marine organisms.
- Standard Compliance: Manufactured in accordance with the GB/T3036-94 standard, a Chinese national standard for butterfly valves, ensuring dimensional consistency, performance reliability, and interchangeability.
The technical specifications of this valve series provide a clear framework for selection and application.
| Parameter | Details |
| Product Type | Wafer Butterfly Valve |
| Operation Method | Lever Handle or Gear Operator |
| Size Range (Nominal Diameter) | DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600 |
| Applicable Standard | GB/T3036-94 |
| Primary Application | Ship Seawater Systems (cooling, ballast, wash-down) |
| Body Material Options | Cast Iron, Ductile Iron, Stainless Steel (304/316), Bronze |
| Disc Material Options | Stainless Steel, Bronze, Aluminum Bronze |
| Seal Material Options | EPDM, NBR, PTFE, Viton (customizable) |
| Connection Type | Flanged (wafer design between flanges) |
Choosing our marine butterfly valve brings distinct advantages to shipbuilders, repair yards, and system integrators.
- Ease of Installation & Maintenance: The wafer design simplifies installation between existing flanges, reducing labor time. The lever or gear operation facilitates easy manual control without complex external power sources.
- Cost-Effectiveness: Compared to other valve types for similar services, butterfly valves often offer a more economical solution due to their simpler construction and lower weight.
- System Reliability: Compliance with GB/T3036-94 and use of seawater-resistant materials enhance the valve's longevity and reliability, minimizing downtime and maintenance costs for vessel operators.
- Global Supply Capability: With ports of shipment including Shanghai, Guangzhou, Hong Kong, and Beijing, and a presence in markets worldwide, we ensure timely delivery and logistical support for international clients.
Backed by our ISO9001 quality management certification and nearly a decade of manufacturing experience since 2016, Shanghai Zhibang Valve delivers products that meet consistent quality benchmarks. Our annual export volume demonstrates trusted relationships with partners across continents. For your ship's seawater system requirements, from DN50 to DN600, our lever or gear-operated wafer butterfly valve provides a standardized, durable, and practical flow control component. Contact us to discuss your specific size, material, and operational needs for a reliable marine solution.
FAQ
Q1: What is the main advantage of a wafer-style butterfly valve over a lug-style for marine applications?
A: The wafer design is installed between two pipeline flanges, secured by the flange bolts. This makes it lighter, more compact, and often less expensive than lug-style valves, which have their own bolt holes. This space and weight saving is beneficial in ship piping layouts.
Q2: Can this valve be used with other fluids besides seawater on a ship?
A: Yes, while designed for seawater, its material options (like stainless steel or PTFE seals) make it suitable for other shipboard fluids such as fresh water, fuel oil (with appropriate seal selection), or low-pressure air, provided temperature and pressure ratings are compatible.
Q3: What is the difference between lever-operated and gear-operated versions?
A: A lever handle provides direct, quick operation but requires more manual force for larger valves or higher differential pressures. A gear operator (gearbox) reduces the required operating torque through a gear mechanism, allowing easier manual control for larger sizes (typically above DN200) or in systems with higher pressure.
Q4: Does GB/T3036-94 compliance ensure compatibility with international flange standards?
A: GB/T3036-94 is a Chinese national standard covering dimensions, materials, and testing. While it ensures quality and consistency, flange face dimensions should be verified against your specific pipeline flange standards (like ANSI, DIN, JIS) for proper fit. Our valves can be adapted to common international flange profiles upon request.
Q5: What seal material is recommended for long-term seawater service?
A: For prolonged seawater exposure, EPDM (Ethylene Propylene Diene Monomer) rubber or PTFE (Polytetrafluoroethylene) seals are commonly recommended due to their excellent resistance to saltwater corrosion, temperature stability, and low susceptibility to marine biological growth.
Q6: Is the valve suitable for high-pressure seawater systems?
A: Butterfly valves are generally used for low to moderate pressure applications. The specific pressure rating (PN rating) depends on size, material, and design. Please consult with us for your system's pressure requirements to confirm suitability and select the appropriate configuration.
Q7: Can you provide valves with different end connections besides wafer type?
A: This product series focuses on the wafer design per the title. However, as a manufacturer, we can produce butterfly valves with other end connections, such as lug type or double-flanged, based on customer specifications and project requirements.
Q8: What is the typical delivery lead time for orders?
A: Lead time depends on order quantity, specific size/material configuration, and current production schedule. Standard sizes in common materials may have shorter lead times. With multiple shipment ports, we aim to facilitate efficient logistics. Contact us for a precise estimate based on your order details.
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