Specification

DN150 PN16 DIN Double Disc Wafer Spring Check Valve

I. Product Overview

NEWWAY wafer-type double-disc stainless steel spring check valves are designed to API 594 and DIN PN16 standards, constructed from 304/316 stainless steel. Featuring dual-disc linkage and spring-loading mechanisms, they automatically prevent backflow in pipelines. Covering DN50-DN1000 (2″-40″) with PN10-PN16 (1.0-1.6MPa) pressure ratings and -10℃~150℃ operating temperatures, these valves are suitable for water, steam, oil, and corrosive media in municipal water supply, petrochemical, and food processing applications.

II. Core Technical Parameters

Specifications & Operating Range

Nominal Diameter: DN50/80/100/150/200/250/300/400/500/600/800/1000 (2″-40″)

Pressure Class: PN10 (1.0MPa), PN16 (1.6MPa)

Temperature Range: -10℃~150℃ (standard), -40℃~200℃ (high-temperature option)

Media Compatibility: Water, sewage, seawater, steam, oil, acids/bases (pH 4-10)

Materials & Sealing System

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

Sealing Pair: NBR rubber (standard), EPDM (temperature-resistant), Viton (oil-resistant), leakage rate ≤0.1% (API 598)

Spring/Pin: 304 stainless steel (HRC28-32), corrosion-fatigue resistant

Connection: Wafer Type (fits DIN PN10/16 flanges)

Mechanical Performance

Opening Pressure: ≤0.03MPa (forward flow resistance)

Closure Response Time: ≤0.2s (triggered by backflow)

Water Hammer Protection: Withstands 1000 Impact tests without damage (ISO 16780)