FCT Parallel Slide Gate Valves

FCT Parallel Slide Gate Valves – Steam Isolation Without Wedge Binding

FCT parallel slide gate valves use two parallel discs that slide against the body seats during opening and closing. Unlike wedge gate valves, they avoid binding under thermal expansion and provide positive shut-off in steam, superheated water, and high-temperature gas services.

The design ensures uniform seat loading, low operational torque, and long sealing life, especially in systems exposed to frequent thermal cycling.

Technical Specifications

• Size Range: 2” to 36” (DN50 to DN900)

• Pressure Ratings: ANSI 150 to 2500 / PN 10 to PN 420

• Design Standards: API 600, ASME B16.34, BS 1414

• Body Materials: Carbon Steel, Alloy Steel, Stainless Steel

• Disc Type: Parallel twin disc with spring or lever mechanism

• Seat Options: Renewable Metal-to-Metal

• Temperature Range: -29°C to +600°C

• End Connections: Flanged, Butt Weld

• Operation: Manual, Gearbox, Pneumatic, Electric

• Leakage Class: API 598 / Class IV or V

• Optional: Pressure Seal Bonnet, Bypass Arrangement

Key Features

• No wedging action – avoids thermal locking

• Dual parallel disc design for balanced sealing

• Ideal for high-pressure steam and thermal shock environments

• Low maintenance and long cycle life

• Smooth, linear operation with low torque

• Seat wear minimized due to non-wedging closure

Applications

• Steam generation and distribution systems

• Power plants and boiler feedwater isolation

• Petrochemical high-temperature lines

• Refinery and utility process steam lines

• Chemical plant shutdown isolation

• Superheated water and thermal fluid loops