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Home > Industrial Equipment & Components > Valve > Butterfly Valve > DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing

DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing

DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing thumbnail-3

DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing thumbnail-4

DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing thumbnail-5

DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing photo-1

DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing photo-2

DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing photo-3

DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing photo-4

DN400 Gear Driven Butterfly Valve With EPDM Liner, GB/T3036 Compliant for Chemical Processing photo-5

Product Spotlights

DN400 manual gear-operated butterfly valve with full EPDM liner for superior chemical resistance in processing applications. Complies with GB/T 3036 standard, features robust ductile iron construction, and offers easy manual operation for large-diameter flow control. Ideal for acids, alkalis, and other corrosive media, providing a reliable, cost-effective sealing solution.

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

Key Specifications

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Valve Type:

Gear Driven Butterfly Valve

Nominal Diameter (DN):

400

Liner Material:

EPDM Rubber

Contact Supplier Request Quote Chat Now

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
Company Profile
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Valve Type Gear Driven Butterfly Valve

Nominal Diameter (DN) 400

Liner Material EPDM Rubber

Compliance Standard GB/T 3036

Primary Application Chemical Processing

Operation Method Manual Gear Operation

Body Material Ductile Iron or Cast Iron

Connection Type Wafer or Flanged

Pressure Rating PN10 or PN16

Temperature Range -20°C to +120°C

As a specialized manufacturer of industrial valves with ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our DN400 Gear Driven Butterfly Valve. This valve is engineered specifically for demanding chemical processing applications where reliability, tight shut-off, and compatibility with aggressive media are critical. Our design incorporates a high-quality EPDM liner and adheres to the GB/T 3036 standard, ensuring performance that meets rigorous industrial requirements. With over eight years of manufacturing expertise and a global presence across continents, we provide a robust solution for flow control in pipelines handling corrosive chemicals, acids, alkalis, and other process fluids.

This valve is constructed to deliver long-term, maintenance-free service in challenging environments. The gear operator provides significant mechanical advantage, allowing for smooth and controlled operation of the large 400mm disc even under higher differential pressures. This makes manual operation feasible and safe for this valve size, eliminating the need for powered actuators in many applications and reducing overall system complexity and cost.

Core Product Features & Technical Advantages:

Superior Sealing with EPDM Liner: The valve features a full-lining of Ethylene Propylene Diene Monomer (EPDM) rubber. This elastomer offers excellent resistance to a wide range of chemicals, including weak acids, alkalis, alcohols, and ketones, which are common in chemical processing. It ensures a bubble-tight seal and protects the metallic body from direct contact with the corrosive media.
Robust Gear Drive Mechanism: The enclosed, precision-machined gearbox provides a high gear ratio, translating moderate handwheel torque into high disc torque. This design ensures easy opening and closing, precise flow modulation, and reliable positioning of the disc. The gear operator can be fitted with a locking device for safety and position security.
GB/T 3036 Compliance: Manufactured in accordance with the Chinese National Standard GB/T 3036 for butterfly valves, this product guarantees dimensional interchangeability, specified pressure ratings, and performance characteristics that are recognized and trusted in many international markets, particularly across Asia and beyond.
Durable Construction: The valve body is typically crafted from high-grade ductile iron (GGG40) or cast iron, offering strength and impact resistance. The disc is often made of carbon steel or stainless steel, epoxy-coated or lined to prevent corrosion. The stem is designed for high shear strength and is fully isolated from the medium by the liner.
Versatile Connection Options: Available in wafer or double-flanged designs to suit different pipeline configurations. The wafer style is compact and lightweight, ideal for space-constrained installations between two flanges. The lugged or flanged version provides end-of-line service capability and easier installation.

Key Technical Specifications:

Parameter	Specification
Nominal Diameter (DN)	400 mm
Pressure Rating (PN)	PN10 / PN16 (1.0 MPa / 1.6 MPa)
Body Material	Ductile Iron (Standard), Cast Iron, Optional Stainless Steel
Disc Material	Carbon Steel with Epoxy Coating / Stainless Steel (CF8/CF8M)
Stem Material	Stainless Steel (2Cr13/304/316)
Seat/Liner Material	EPDM (Standard), NBR, Viton® (FKM) available
Operating Temperature	-20°C to +120°C (with EPDM liner)
Operation	Manual Gear Operator (Standard), Actuator adaptable
End Connection	Wafer, Lugged, or Double Flanged (to DIN/ANSI/JIS standards)

Benefits for Your Chemical Processing Operation:

Enhanced Process Safety: The reliable shut-off and chemical-resistant liner minimize the risk of leaks, protecting personnel, equipment, and the environment.
Reduced Maintenance Costs: The durable EPDM liner and robust gear mechanism are designed for longevity, decreasing the frequency and cost of valve replacements and repairs.
Operational Efficiency: The gear drive allows for easy manual control of a large-diameter valve, facilitating quick isolation of pipeline sections for maintenance without requiring heavy tools.
System Compatibility: Compliance with GB/T 3036 and availability in standard flange dimensions ensure easy integration into existing and new piping systems worldwide.
Cost-Effective Solution: Compared to other valve types of similar size (like gate or ball valves), the butterfly valve offers a more compact, lighter, and often more economical choice for on/off and throttling service.

Shanghai Zhibang Valve backs its products with the credibility of an ISO9001 certified manufacturing process, ensuring consistent quality from raw material inspection to final testing. Our annual export volume of US$1-1.5 million to diverse markets including North America, Europe, Southeast Asia, and Africa is a testament to the global acceptance and reliability of our valves. We support this with efficient logistics, shipping from major ports like Shanghai, Guangzhou, and Hong Kong. For your next project requiring dependable, standards-compliant flow control in chemical processing, choose our DN400 Gear Driven Butterfly Valve. It represents a balance of performance, durability, and value. Contact us today for a detailed quotation, technical datasheets, or to discuss custom requirements for your specific application.

Frequently Asked Questions (FAQ):

Q: What specific chemicals is the EPDM liner resistant to?
A: The standard EPDM liner offers strong resistance to a broad spectrum of media, including weak acids and bases, phosphate esters, ketones, alcohols, hot water, and steam. It is not recommended for petroleum-based oils, fuels, or strong oxidizing acids. For aggressive media, alternative liners like FKM (Viton®) can be specified.
Q: Can this valve be automated with an electric or pneumatic actuator?
A: Yes, absolutely. The gear operator is designed with a standard interface (ISO 5211 mounting pad) that allows for straightforward attachment of various electric, pneumatic, or hydraulic actuators. This provides flexibility for remote or automated control systems.
Q: Is the GB/T 3036 standard compatible with ANSI or DIN flanges?
A: While GB/T is a Chinese standard, our valves are commonly manufactured with flange dimensions that align with international standards like DIN EN 1092 or ANSI B16.5 for specific pressure classes (e.g., PN10/16 aligning with Class 150). It is crucial to specify your required flange standard when ordering to ensure proper fit.
Q: What is the expected service life of the valve and its liner?
A: Service life depends heavily on operating conditions (media, concentration, temperature, cycle frequency). Under standard chemical processing conditions within the specified temperature and pressure limits, the valve body and gear mechanism can last for decades. The EPDM liner typically offers a long service life but is considered a wear part and may require eventual replacement, which is a straightforward procedure.
Q: Do you provide a test certificate with the valve?
A: Yes, as an ISO9001 certified manufacturer, we perform routine tests such as shell strength test, seat leakage test, and operational torque test. A standard factory test report can be provided. More comprehensive testing (e.g., third-party inspection) is available upon request.
Q: What is the lead time for an order of DN400 valves?
A: Lead time varies based on order quantity and specific configuration (material, liner type). For standard configurations with EPDM liner, typical production lead time is 4-6 weeks. We maintain efficient communication to provide accurate timelines for each project.
Q: Is the valve suitable for throttling (flow control) applications, or just on/off service?
A: The gear-operated design provides excellent control and positioning capability, making this valve well-suited for both on/off isolation and precise throttling or regulating flow in chemical processes.