Specification

Wafer Lug Type Triple Eccentric Full Stainless Steel/Carbon Steel Butterfly Valve

I. Product Overview

Newway wafer lug type triple eccentric butterfly valve is a high-performance industrial valve engineered with advanced triple eccentric technology, designed to deliver reliable flow control in demanding industrial environments. Constructed with either full stainless steel or carbon steel bodies, this valve combines robust structural design, precise sealing performance, and versatile applicability to meet the stringent requirements of systems handling water, steam, oil, seawater, and other industrial media. Its wafer lug connection and worm gear operation ensure easy installation and efficient operation, making it a critical component in industries where tight shutoff, durability, and adaptability to varying temperatures and pressures are essential. Whether integrated into pipeline systems for water treatment, petrochemical processing, or power generation, this valve maintains consistent performance across a broad range of operational conditions.

II. Key Attributes and Specification Parameters

1. Basic Attributes

Structure Design: Features a triple eccentric sealing structure, where the valve stem, disc, and sealing surface are offset by three distinct eccentricities. This design minimizes friction between the disc and sealing surface during operation, reducing wear and enhancing sealing reliability—especially critical for high-temperature and high-pressure applications.

Body Material: Available in two primary material options: full stainless steel (for enhanced corrosion resistance, ideal for seawater or chemical-rich environments) and carbon steel (for cost-effective performance in general industrial settings with moderate corrosion conditions).

Connection Form: Wafer lug type, allowing for easy installation between pipeline flanges without the need for additional gaskets in some configurations. The lug design provides added stability, enabling the valve to be used as a blind flange when fully closed, enhancing system flexibility.

Driving Mode: Worm gear operation, which converts rotational motion into linear actuation of the disc. This mechanism offers precise control over flow rates, with a self-locking feature that prevents unintended movement, ensuring safe operation in critical systems.

Pressure Rating: Available in two nominal pressure classes to accommodate diverse industrial needs: 150lb and 300lb, corresponding to medium-pressure applications (2.5MPa < PN < 6.4MPa) as defined by industry standards.

Temperature Range: Designed to operate across a broad temperature spectrum from -29°C to 425°C, making it suitable for both low-temperature and high-temperature media such as steam.

Media Compatibility: Versatile for use with multiple industrial media, including water (fresh and industrial), steam, mineral oil, hydraulic oil, and seawater, ensuring adaptability across different operational contexts.

Design and Testing Standards: Complies with international standards to ensure quality and compatibility:

Design Standard: API 609 (specifications for butterfly valves)

Flange Connection Dimensions: ANSI B16.5 (ensuring compatibility with ANSI-standard flanges)

Structure Length: ANSI B16.10 (defining valve length for consistent installation)

Pressure Testing: API 598 (establishing procedures for shell and seal testing to verify leak tightness)

2. Detailed Specification Parameters

Nominal Diameter Range: 2″ to 36″ (corresponding to DN50 to DN900), covering small to large pipeline systems.

Test Pressures:

For 150lb class: Shell test pressure 3.0MPa; Seal test pressure 2.2MPa

For 300lb class: Shell test pressure 7.5MPa; Seal test pressure 5.5MPa

Key Dimensions (Selected Sizes for Reference):

150lb Class:

300lb Class: