Butterfly Valve, Manual/Worm Gear/Electric/Pneumatic, Cast Iron/Wcb/Stainless Steel, Wafer/Lug/Flange/Clamp, ANSI/DIN/JIS/API Industrial Valve

Product Description

Butterfly Valve Introduction

PRODUCT INTRODUCTION

A butterfly valve is a rotary on-off and regulating valve. It controls the opening, closing, or throttling of media in pipelines by rotating a disc-shaped butterfly plate 0 to 90 around the valve stem.

As the simplest-structured and most cost-effective fluid control valve for low-pressure applications, the butterfly valve achieves opening and closing with a 90 rotation of the disc. It is widely used in low-pressure pipelines for water supply and drainage, HVAC, chemical, and other industries.

With a simple structure, compact size, light weight, and fast opening/closing action, butterfly valves are extensively applied in low-to-medium pressure, large-diameter fluid pipelines. They are among the most commonly used general-purpose valves in industrial and municipal systems.

Core Structure:Body, butterfly disc, stem, sealing seat, manual actuator (handle / gearbox).

Working Principle:

 Disc parallel to the pipeline Fully open (extremely low flow resistance).

 Disc perpendicular to the pipeline Fully closed (tight contact of sealing surfaces for shutoff).

TECHNICAL SPECIFICATIONS

 Nominal Diameter (DN): 15mm ~ 2000mm

 Nominal Pressure (PN): 0.6 MPa / 1.0 MPa / 1.6 MPa / 2.5 MPa / 4.0 MPa

 ANSI Class: 150 / 300

 Working Temperature:

o Soft-seated: -20 ~ 120 (NBR / EPDM)

o Hard-seated: -40 ~ 600

 Applicable Media: Water, seawater, steam, air, oil products, sewage, acid and alkali corrosive media, etc.

 Design Standards: GB/T 12238, API 609, MSS SP-67, EN 593

 Connection Standards: GB, ANSI, JIS, DIN

 Actuation Types: Manual, gear operated, pneumatic, electric

PRODUCT FEATURES

 Compact structure, small size, light weight, requiring minimal installation space for easy transport and mounting.

 Fast operation: 90 rotation allows full open/close with low operating torque.

 Low fluid resistance: When fully open, flow resistance is nearly equal to that of a straight pipe, minimizing pressure loss.

 Excellent regulating performance, suitable for throttling and flow control applications.

 Superior sealing performance; soft-seated versions achieve bubble-tight zero leakage.

 Easy maintenance: Sealing components can be replaced without full valve disassembly.

 Wide range of applicable sizes, covering both small and large diameters.

 Lower cost with better cost-effectiveness compared to gate valves and globe valves.

BUTTERFLY VALVE CLASSIFICATIONS

1. By Connection Type

 Wafer Butterfly Valve: No flanges on the valve body. Installed directly between pipeline flanges with bolts. Features the shortest structure, low cost, and easy installation.

 Flanged Butterfly Valve: Integral flanges on the body for direct bolted connection to pipeline flanges. Offers better sealing performance and higher pressure ratings.

 Welded Butterfly Valve: Directly welded to the pipeline. Suitable for high-temperature, high-pressure applications requiring strict zero leakage.

 Grooved / Victaulic Butterfly Valve: Connected via grooved couplings for quick installation. Commonly used in fire protection and water supply/drainage systems.

2. By Sealing Type

 Soft-Seated Butterfly Valve: Sealed with elastic materials such as rubber or fluoroplastics. Provides excellent sealing performance and achieves zero leakage. Suitable for normal temperature and pressure conditions.

 Hard-Seated Butterfly Valve: Metal-to-metal sealing. Resistant to high temperatures, wear, and erosion. Ideal for high-temperature, high-pressure, and particle-containing media.

3. By Structural Eccentricity

 Concentric Butterfly Valve: Valve stem, disc, and body are concentric. Simple structure with bidirectional sealing. Commonly used in general low-pressure applications.

 Double-Eccentric Butterfly Valve: Double eccentricity between the stem, body, and disc. Reduces friction during operation, lowers torque requirements, and extends service life.

 Triple-Eccentric Butterfly Valve: Triple eccentricity of the stem, disc, and sealing cone. Zero friction on sealing surfaces, enabling high-pressure, high-temperature, and zero-leakage performance. A high-performance butterfly valve.

4. By Actuation Type

 Manual Butterfly Valve: Hand lever / gearbox operated.

 Pneumatic Butterfly Valve: Equipped with a pneumatic actuator for remote control.

 Electric Butterfly Valve: Fitted with an electric actuator for automatic regulation and on/off control.

 Hydraulic Butterfly Valve: Hydraulically driven. Suitable for high-torque, large-diameter applications.

5. By Lining / Material

Lined butterfly valves (rubber-lined, PTFE-lined), stainless steel butterfly valves, cast steel butterfly valves, ductile iron butterfly valves, etc.