NWV high-temperature steam flanged forged steel lift check valves are constructed from WCB forged carbon steel, designed to GB/T 12235 and API 594 standards.
Port Size:: DN15-DN300
Media:: Water,gas,oil,etc
Sealing Material:: Steel, Rubber
Disc:: WCB
Pressure:: PN16
Temperature Range:: -20℃~425℃
Specification
NWV High Temperature Steam Forged Steel Lift Check Valve
I. Product Overview
NWV high-temperature steam flanged forged steel lift check valves are constructed from WCB forged carbon steel, designed to GB/T 12235 and API 594 standards. The valve ensures unidirectional flow through a lift-type disc guided by vertical rods, covering DN15-DN300 (1/2″-12″) with PN16 (1.6MPa) pressure rating and -20℃~425℃ temperature range. Specifically engineered for high-temperature steam, thermal oil, and similar media, it serves petrochemical, power, and heating industrial pipelines.
II. Core Technical Parameters
Specifications & Operating Range
Nominal Diameter: DN15/20/25/40/50/80/100/150/200/250/300 (1/2″-12″)
Pressure Class: PN16 (shell test pressure 2.4MPa, sealing test pressure 1.76MPa)
Temperature Range: -20℃~425℃ (standard), -40℃~550℃ (high-temperature alloy option)
Media Compatibility: Saturated steam, superheated steam, thermal oil, water, compressed air
Materials & Sealing System
Body/Bonnet: WCB forged carbon steel (tensile strength ≥485MPa, elongation ≥22%)
Disc/Seat: WCB with STL alloy overlay (HRC58-62), sealing surface roughness Ra≤0.8μm
Gasket: Flexible graphite + 304 stainless steel wound gasket (resists 600℃)
Connection: Flanged (RF face, GB/T 9113-2010/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)
