The ZDG high-performance shut-off butterfly valve is a high-end pipeline control unit integrating a high-thrust electric actuator with a precision eccentric butterfly valve body. Specifically engineered for large-diameter, high-differential pressure conditions in industrial systems that require strict isolation, the valve utilizes high torque from the actuator to rotate the disc 0-90 degrees for instantaneous shut-off or opening. Utilizing advanced double or triple offset structures, this series offers low operating torque, minimal sealing surface wear, and high sealing reliability, serving as a superior alternative to bulky traditional gate or ball valves. The ZDG series maintains excellent shut-off performance in high-temperature and high-pressure environments and is widely used in safety control loops for petroleum, chemical, power, and district heating industries due to its erosion-resistant design.

Product Image of ZDG High-Performance Shut-off Butterfly Valve

1.Eccentric geometry for frictionless operation:Utilizes double or triple offset logic so the disc detaches from the seat immediately upon opening, fundamentally eliminating friction. This significantly reduces torque and extends seal life.
2.Superior bi-directional sealing and shut-off:Precision-ground sealing pairs offer multi-layered metal hard-seal or resilient soft-seal options. It achieves bubble-tight closure meeting ANSI Class VI standards, ensuring system safety.
3.Powerful and sensitive electric drive:Equipped with high-performance intelligent actuators featuring large torque and rapid response. Supports remote automation and local manual override with integrated overload and phase protection.
4.Low flow resistance and energy efficiency:The disc's streamlined design provides a near-straight flow path when fully open. This minimal resistance reduces pipeline pressure drop and pumping energy consumption.
5.Compact and lightweight layout:Compared to same-sized gate valves, the face-to-face length is shorter and weight is lower. This saves space and reduces mechanical loads and support costs for the piping system.
6.Durable material configurations:Body and disc are available in carbon steel, stainless steel, or special alloys. Sealing surfaces can be hard-faced with alloys for exceptional resistance to erosion and wear in harsh media.
7.Inherent fire-safe and anti-static design:Complies with API 607 fire safety standards. It maintains basic sealing integrity during extreme fire events and features reliable anti-static grounding for hazardous chemical sites.
8.Low O&M cost modularity:Actuator-to-body connections follow ISO standards. Wearing parts like seal rings are replaceable without removing the valve body, shortening maintenance downtime.

Structural Drawing of ZDG High-Performance Shut-off Butterfly Valve

List of Component Names and Materials

Performance Specification Sheet

Standard requirements for external dimensions

1.Design & Manufacturing: GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357

2.Flange Dimensions: JB/T74～90, GB9112～9131, HGJ44～76, SH3406, ANSI B16.5, JIS B2212～2214, NF E29-211, DIN2543

3.Face-to-Face Dimensions: GB12221-89, ANSI B16.10, JIS B2002, NF E29-305, DIN3202

4.Inspection & Testing: JB/T 9092, API 598

Outline Drawing of ZDG High-Performance Shut-off Butterfly Valve

Outline dimension table（Unit：mm）