Product Description

Butterfly Valve Introduction

PRODUCT INTRODUCTION

• 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:
  • Soft-seated: -20 ~ 120 (NBR / EPDM)
  • 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