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Help CenterDuctile Iron Butterfly Valve With Stainless Steel Stem, GB/T3036 Compliant, Fire-Safe Design
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As a professional valve manufacturer established in 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our high-performance Ductile Iron Butterfly Valve with Stainless Steel Stem. Engineered for reliability and longevity in demanding industrial applications, this valve is designed to meet the rigorous GB/T3036 standard and incorporates a critical fire-safe design. Our commitment to quality, backed by ISO9001 certification, ensures that every valve delivers exceptional flow control, durability, and safety for our global clientele across diverse markets from North America to Southeast Asia.
This valve is engineered to provide superior performance where it matters most. The combination of a robust ductile iron body with a corrosion-resistant stainless steel stem offers an optimal balance of strength and durability. The fire-safe design is a crucial feature for applications in oil & gas, chemical processing, and power generation, providing an added layer of protection in extreme conditions. Our manufacturing process focuses on precision and consistency, resulting in a product that ensures tight shut-off, smooth operation, and minimal maintenance over its extended service life.
Key Technical Specifications & Features:
- Robust Construction: The ductile iron body provides high tensile strength and impact resistance, significantly outperforming standard gray iron, making it suitable for higher pressure applications.
- Corrosion-Resistant Stem: The stainless steel stem is resistant to corrosion and galling, ensuring reliable operation and long-term integrity, even in harsh environments.
- Fire-Safe Certification Design: The valve is designed with features that maintain sealing integrity under fire conditions, helping to prevent catastrophic failure. Specific fire-test certifications are available upon request.
- Standard Compliance: Manufactured in strict compliance with the GB/T3036 standard, ensuring dimensional accuracy, performance reliability, and interchangeability.
- Versatile Seating Options: Available with various seat materials (e.g., EPDM for water, NBR for oil, PTFE for chemicals) to match specific media and temperature requirements.
- Multiple Operation Methods: Can be fitted with a manual lever, gear operator, or automated actuator (pneumatic/electric) for remote control and integration into process systems.
- Low Torque Operation: The streamlined disc design and precision-machined components ensure low operating torque, reducing wear on the stem and seat and allowing for easier manual operation.
- Bidirectional Sealing: Provides effective sealing in both flow directions, enhancing installation flexibility and system reliability.
The benefits for your operation are clear:
- Enhanced Safety: The fire-safe design mitigates risk in flammable service, protecting personnel and assets.
- Reduced Lifetime Cost: The durable materials and construction minimize maintenance needs and frequency of replacement.
- Improved System Reliability: Consistent performance ensures stable process control and reduces unplanned downtime.
- Global Supply Compatibility: Compliance with GB/T3036 facilitates installation and replacement in systems using this common standard.
- Application Flexibility: Suitable for a wide range of services including water, oil, gas, steam (with appropriate seat), and various chemicals.
| Parameter | Specification / Option |
|---|---|
| Size Range | DN50 (2") to DN600 (24") |
| Pressure Rating (PN) | PN10, PN16, PN25 (Standard) |
| Face-to-Face | As per GB/T3036 / EN / API609 standards |
| Disc Material | Ductile Iron (Standard), Stainless Steel (Optional) |
| Stem Material | Stainless Steel 410/304/316 (Standard) |
| Seat Material | EPDM, NBR, Viton, PTFE (Selectable) |
| Connection | Wafer (Standard), Lug (Optional) |
| Operating Temperature | -20°C to +150°C (EPDM), Up to +200°C (PTFE) |
Shanghai Zhibang's decade-long manufacturing expertise and ISO9001 quality management system underpin the reliability of every valve we produce. With an annual export value consistently between US$1-1.5 million, we have established a trusted supply chain to major industrial regions worldwide, including North America, Europe, the Middle East, and Southeast Asia. Our strategic location with multiple shipment ports (Shanghai, Guangzhou, Hong Kong, Beijing) ensures efficient and flexible logistics. Choosing our Ductile Iron Butterfly Valve means partnering with a proven manufacturer dedicated to delivering a product that combines safety, durability, and value. Contact us today to discuss your specific requirements and experience the Zhibang difference in flow control solutions.
Frequently Asked Questions (FAQ)
Q1: What is the main advantage of using ductile iron over gray iron for the valve body?
A: Ductile iron offers superior mechanical properties, including higher tensile strength, better impact resistance, and greater elongation. This makes the valve more durable, especially for higher pressure applications and where mechanical shock or water hammer might be present, ultimately extending the valve's service life.
Q2: How does the "fire-safe design" function in this butterfly valve?
A: The fire-safe design typically involves specific engineering of the seat and stem seal areas. In a fire event, the primary soft seat may degrade, but a secondary metal-to-metal sealing mechanism engages to maintain a seal and prevent uncontrolled leakage of flammable media, helping to contain the fire.
Q3: Can this valve be used for steam service?
A: Yes, but the seat material selection is critical. Standard elastomer seats like EPDM or NBR are not suitable for steam. For steam applications, you must specify a high-temperature seat material such as PTFE or a specialized high-temperature elastomer, and the temperature/pressure ratings must be confirmed.
Q4: What does GB/T3036 compliance mean for me as an international buyer?
A: GB/T3036 is a Chinese national standard for butterfly valves that specifies dimensions, pressure ratings, and testing requirements. Compliance ensures the valve is manufactured to a recognized and consistent specification. It is widely accepted and often compatible with other international standards like EN and ISO, facilitating installation in global projects.
Q5: Is the stainless steel stem standard on all your ductile iron butterfly valves?
A: Yes, in this product line, a stainless steel stem is a standard feature. We use grades like 410, 304, or 316 stainless steel to provide excellent corrosion resistance and prevent stem seizure, which is a common failure point in valves with carbon steel stems.
Q6: What types of actuators can be fitted to this valve?
A: The valve is designed to be compatible with a wide range of actuators. We can supply or recommend suitable pneumatic (double-acting or spring-return), electric (on/off or modulating), or hydraulic actuators. The mounting interface is standardized (e.g., ISO 5211) to accommodate most major actuator brands.
Q7: Do you offer custom face-to-face dimensions if my piping standard is different?
A: Absolutely. While our standard valves are built to GB/T3036 dimensions, we understand that projects may require compliance with ASME, EN, or other standards. We offer customization of face-to-face lengths and flange drilling patterns upon request to ensure a perfect fit for your specific piping system.
Q8: What is your typical lead time for an order?
A: Lead time depends on the order quantity, size, and specific configuration (seat material, actuator requirement). For standard configurations in common sizes, we often have stock or can produce within 4-6 weeks. We provide a precise lead time quotation with every formal offer.
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