FCT axial flow check valves, commonly referred to as nozzle check valves, are engineered to provide non-slam, fast-closing action in systems with high velocity and rapid flow reversal. The spring-assisted disc moves axially within the flow path and returns to the seat instantly when flow stops or reverses—eliminating water hammer and mechanical shock.
With their streamlined flow path and compact body, these valves are ideal for vertical or horizontal mounting and are frequently used in compressor discharge lines, cooling water systems, and turbine or boiler feed applications.
Design Standards: API 594, ASME B16.34, EN 12334
Size Range: 2” to 48” (DN50 to DN1200)
Pressure Ratings: ANSI 150 to 2500 / PN 10 to 420
Body Materials: Carbon Steel, Stainless Steel, Duplex, Alloy Steel
Disc Type: Axial Spring-Assisted Piston or Plate
Seat Options: Metal-to-Metal or Soft Seated
End Connections: Wafer, Flanged, Butt Weld
Temperature Range: -46°C to +425°C
Leakage Class: API 598 / EN 12266, Class IV or better
Mounting: Horizontal or Vertical (Flow Up)
Non-slam, spring-assisted closure prevents water hammer
Axial flow design ensures low-pressure drop and high flow efficiency
Compact, maintenance-friendly body with minimal moving parts
Metal or soft-seated sealing for tight shut-off
Suitable for vertical or horizontal installation
Long service life in high-cycle applications
Compressor discharge lines
Steam condensate and boiler feedwater systems
Cooling water loops in power plants
Offshore and subsea pump protection
Turbine bypass and shutdown valves
General flow control in high-pressure networks