Specification

DN400 PN16 WCB Bidirectional Pressure-Bearing Triple Eccentric Metal Multi-Layer Hard Seal Wafer Butterfly Valve

I. Product Overview

Newway DN400 PN16 WCB bidirectional pressure-bearing triple eccentric metal multi-layer hard seal wafer butterfly valve is a high-performance industrial valve engineered for precise flow control in medium-pressure pipeline systems. Constructed with WCB cast carbon steel (renowned for robust mechanical properties and temperature resistance), this valve integrates a triple eccentric design and metal multi-layer hard sealing. Optimized for diverse media (water, steam, oil, mildly corrosive fluids), its wafer connection enables compact pipeline integration. The triple eccentric structure, combined with bidirectional pressure-bearing and multi-layer hard sealing, ensures tight shutoff, minimal wear, and extended service life—critical for reliable industrial operations. Whether in power plants, petrochemical facilities, or municipal networks, it adapts seamlessly to varying conditions.

II. Key Attributes and Specification Parameters

Basic Attributes

Structure Design: Triple eccentric (offsets for valve shaft, disc sealing surface, body sealing surface). Allows the disc to lift off the seat during operation (minimizing friction/wear) and form a “wedge-like” tight seal when closing—ideal for high-pressure, hard-sealed scenarios.

Body Material: WCB cast carbon steel. Offers high tensile strength, good impact resistance, and suitability for temperatures up to 425℃, balancing durability and cost for medium-pressure systems.

Disc & Seat Materials:

Disc: Carbon steel with hard alloy (e.g., Stellite) overlay welding on the sealing surface (enhances wear, erosion, and high-temperature resistance).

Seat: Precision-machined metal ring (stainless steel/alloy steel) with multi-layer sealing edges, mating with the disc’s hard alloy surface for reliable metal-to-metal sealing.

Pressure Rating: PN16 (1.6MPa), suitable for medium-pressure pipelines (steam distribution, oil transfer, high-pressure water systems).

Nominal Diameter: DN400 (16”), catering to large-diameter, high-flow applications (e.g., power plant cooling water, urban water mains).

Temperature Range: -29℃ to 425℃, operating reliably in low-temperature (chilled water) and medium-high temperature (saturated steam, hot oil) environments.

Media Compatibility: Versatile for clean water, raw water, sewage, saturated steam, crude oil, refined petroleum, natural gas, and mildly corrosive fluids (pH 5–9).

Connection Type: Wafer (double flange) connection, conforming to PN16 standards (GB/T 9113, ASME B16.5). Clamped between pipeline flanges for compact installation in space-constrained layouts.

Operation Modes: Supports manual (lever/gear), electric (motorized for remote/automated control), or pneumatic (air-driven for rapid response) drive methods.

Sealing Type: Metal multi-layer hard seal (ensures reliable shutoff in high-pressure, high-temperature, or abrasive media; multi-layer design boosts sealing stability).

Design Standards: Complies with API 609, GB/T 12238, ASME B16.34 (ensures global pipeline compatibility).