Specification

API609 Ductile Iron High Pressure Operated Full Lug Style Wafer Butterfly Valve

I. Product Technical Overview

Newway ductile iron  full lug style wafer butterfly valve is specially designed for water supply/drainage, building HVAC, and light industry fluid control. Adopting a classic center-line structure (coaxial stem, disc, and pipeline centerline), it covers DN50-DN600 (2″-24″) in diameter, suitable for PN10/PN16 (1.0/1.6MPa) pressure classes, with medium temperature ranging from -10℃ to 120℃ (standard type) and short-term resistance up to 150℃. The body uses ductile iron (tensile strength ≥500MPa, elongation ≥7%), the sealing seat adopts EPDM/NBR rubber, and it is matched with manual, worm gear, or electric drives, widely applied in municipal pipelines, sewage treatment, air conditioning systems, and other non-corrosive media scenarios.

II. Core Product Features

(A) Center-Line Symmetric Structure Design

The core advantage of Newway center-line butterfly valve lies in its structural simplicity:

Coaxial Sealing Principle: The stem axis coincides with the disc center and pipeline centerline. The disc rotates 90° around the axis to complete opening/closing. The sealing seat adopts a radial extrusion design, achieving zero leakage through rubber elastic deformation, with a leakage rate ≤1×10⁻⁸m³/s (EN12266 standard).

Low Torque Operation: The opening torque is 25% lower than that of offset butterfly valves, and the manual operation torque of DN200 valve is ≤50N·m, suitable for frequent manual operation scenarios.

(B) Full Lug Wafer Structure

Installation Convenience: The valve body is equipped with full-pass lug shafts on both sides, connected to pipeline flanges through bolts without additional supports, saving 40% installation space compared to flanged valves;

Uniform Force Distribution: The lug structure ensures even distribution of bolt loads, avoiding body deformation, suitable for vibrating conditions (such as pump inlet/outlet pipelines).

(C) High-Performance Material System

III. Key Technical Attributes