Specification

PN16 stainless steel Flanged Forged Steel Lift Check Valve

I. Product Overview

NEWWAY flanged forged steel lift check valves comply with GB/T 12235 standards, constructed from A105 forged carbon steel and 304/316 stainless steel. The valve ensures unidirectional flow through gravity-assisted disc reset and medium pressure, covering DN15-DN300 (1/2″-12″) with PN16-PN100 (1.6-10.0MPa) pressure ratings and -196℃~600℃ temperature range. Suitable for water, steam, oil, and natural gas, it prevents equipment damage and process interruptions from backflow.

II. Core Technical Parameters

Specifications & Pressure-Temperature Range

Nominal Diameter: DN15/20/25/40/50/80/100/150/200/250/300 (1/2″-12″)

Pressure Class: PN16/PN25/PN40/PN64/PN100 (1.6-10.0MPa)

Temperature Range: -196℃~230℃ (304 stainless steel), -29℃~600℃ (A105 carbon steel with high-temp treatment)

Materials & Sealing System

Body/Bonnet: A105 forged carbon steel (tensile strength ≥485MPa), 304/316 stainless steel (ASTM A182)

Disc/Seat: 304 with STL alloy overlay (HRC58-62), sealing surface roughness Ra≤0.4μm

Gasket: Metal wound gasket (resists 600℃), leakage rate ≤1×10⁻⁶cc/s (API 598)

Connection: Flanged (RF face, GB/T 9113/ASME B16.5)

Mechanical Performance

Opening Pressure: ≤0.05MPa (forward flow resistance)

Closure Response Time: ≤0.3s (triggered by backflow)

Water Hammer Resistance: 1000 cycles without damage (ISO 16780)