FCT Pressure Seal Gate Valve

FCT Pressure Seal Gate Valve – Compact Isolation Under Extreme Conditions

FCT pressure seal gate valves are engineered for class 600 to 2500 pressure ratings and temperatures up to 600°C, utilizing a pressure-activated bonnet seal that tightens as system pressure increases. This makes them highly effective in critical steam and power applications, where conventional bolted bonnets may fail under stress.

These valves are commonly used in thermal power plants, boilers, superheated steam systems, and process units that demand zero leakage and minimal maintenance.

Technical Specifications

• Design Standards: ASME B16.34, API 600

• Size Range: 2” to 24” (DN50 to DN600)

• Pressure Ratings: ANSI 600 to 2500 / PN 100 to 420

• Body Materials: Forged or Cast Steel (WCB, WC6, WC9, C12A), Stainless Steel

• Trim: Hard-faced alloys (Stellite®, CrCo)

• Seat Type: Metal-to-Metal

• Bonnet: Pressure Seal (Self-energizing)

• Temperature Range: -29°C to +600°C

• Leakage Class: API 598 / Class IV or V

• Operation: Manual, Gearbox, Electric or Hydraulic

Key Features

• Pressure seal bonnet tightens with system pressure

• Compact body and bonnet design reduces weight and installation space

• Excellent for high thermal cycling applications

• Metal seated for durability in steam and thermal oil

• Low emissions stem packing (fugitive emission compliant)

• Long service life with minimal maintenance intervals

Applications

• Superheated and saturated steam isolation

• High-pressure boilers and power generation systems

• Heat exchanger and turbine isolation

• Thermal oil circuits

• Petrochemical cracking and refining lines

• Nuclear and conventional power plants