Specification

High Performance Butterfly Valve Wafer Double Eccentric Metal Seated WCB

I. Product Overview

As a key flow regulation and shut-off device in industrial pipeline systems, the Newway high-performance wafer double-offset butterfly valve features an innovative double-offset structure, combined with materials like stainless steel, carbon steel, or ductile iron, and achieves precise control through electric, pneumatic, or manual actuation. With a diameter range of DN50-DN1200 (2″-48″) and pressure ratings of PN10-PN40, it stably manages various media such as water, steam, oil, and gas within -29°C-350°C. Widely used in water supply/drainage, power, chemical, and metallurgy sectors, it complies with international standards like API 609, EN 593, and GB/T 12238.

II. Core Features: Double-Offset Technology and Material Innovation

Eccentric Principle: The stem axis deviates from both the seat centerline and disc center, forming double offsets. This design allows the disc to disengage from the seat rapidly when opening, reducing seal surface friction by 70% compared to ordinary butterfly valves.

Sealing Performance: The 3D offset structure creates a line seal between the disc and seat. Paired with elastic seals (EPDM, NBR, or PTFE), it achieves ANSI FCI 70-2 Class VI (bubble-tight) sealing.

Torque Optimization: The double-offset design significantly reduces opening/closing torque. The electric actuation torque for DN600 is ≤350N·m, reducing energy consumption by 25% compared to similar products.

Body Materials: Carbon steel (WCB) suits conventional industrial scenarios; stainless steel (304/316) offers 8x higher chloride corrosion resistance for seawater or chemical environments; ductile iron (QT450-10), 40% stronger than ordinary cast iron, applies to low-pressure large-diameter pipelines.

Surface Treatment: The valve body uses epoxy coating (thickness ≥200μm), passing salt spray tests ≥1000 hours without rust, compliant with drinking water standards (WRAS certified).

Temperature Adaptability: Special material combinations meet requirements for -29°C low-temperature LNG pipelines and 350°C high-temperature steam systems.

Actuator Configuration: Optional electric (AC220V/380V), pneumatic (4-6bar), or hydraulic actuators. The electric actuator has IP68 protection and Ex d IIBT4 explosion-proof rating.

Control Modes: Supports on/off type and regulating type (4-20mA analog), with optional smart positioners for PID regulation and ±0.5% accuracy.

Remote Monitoring: Integrated with Modbus/TCP, Profibus, etc., enabling remote control and status feedback via SCADA systems.

III. Key Attributes: Technical Parameters and Standard Compliance