PN16 Wafer Type Metal Seated Stainless Steel 304 316 Manual Check Valve

Characteristics

Nominal Diameter:: DN50/80/100/150/200/250/300 (2″-12″)

Pressure Class:: PN16 (shell test pressure 2.4MPa, sealing test pressure 1.76MPa)

Temperature Range:: -196℃~230℃ (304 SS), -101℃~600℃ (316 SS)

Body/Disc:: 304 stainless steel (ASTM A351 CF8), 316 stainless steel (ASTM A351 CF8M)

Sealing Pair:: Metal-to-metal seal (surface roughness Ra≤0.8μm), leakage rate ≤1×10⁻⁶cc/s (API 598)

Connection:: Wafer type (fits ANSI B16.5/GB/T 9113 flanges)

Specification

NWV PN16 Wafer Type Metal Seated Stainless Steel 304 316 Manual Check Valve

I. Product Overview

NWV wafer-type metal-seated check valves are constructed from 304/316 stainless steel (CF8/CF8M), designed to GB/T 12236 and API 594 standards. Installed between flanges via a wafer-style design, they cover DN50-DN300 (2″-12″) with PN16 (1.6MPa) pressure rating and -196℃~600℃ temperature range. Suitable for water, steam, oil, and corrosive media, these valves use a rotating disc for automatic backflow prevention in harsh industrial applications like petrochemical, nuclear, and LNG sectors.

II. Core Technical Parameters

Specifications & Pressure-Temperature Range

Nominal Diameter: DN50/80/100/150/200/250/300 (2″-12″)

Pressure Class: PN16 (shell test pressure 2.4MPa, sealing test pressure 1.76MPa)

Temperature Range: -196℃~230℃ (304 SS), -101℃~600℃ (316 SS)

Materials & Sealing System

Body/Disc: 304 stainless steel (ASTM A351 CF8), 316 stainless steel (ASTM A351 CF8M)

Sealing Pair: Metal-to-metal seal (surface roughness Ra≤0.8μm), leakage rate ≤1×10⁻⁶cc/s (API 598)

Connection: Wafer type (fits ANSI B16.5/GB/T 9113 flanges)

Pin Shaft: 2Cr13 stainless steel (HRC35+), erosion-resistant

Mechanical Performance

Opening Pressure: ≤0.02MPa (forward flow resistance)