FLS-DAN API 6A Double-Acting Actuated Drilling Gate Valve | SLB


API 6A double-acting actuated drilling gate valve

Gate Valves installed in the field.

For positive control of gate valves for many drilling applications, Cameron offers the FLS-DAN gate valve. This design is a combination of the field-proven FLS extreme service API 6A slab-style gate valve with a double-acting hydraulic actuator. The FLS gate valve is widely recognized as a high-quality valve for severe service applications. The fullbore, through-conduit FLS-DAN gate valve is available in standard double flange, threaded-end, and special block body configurations.

The gate valve is fitted with a balancing lower stem to work with a double acting hydraulic actuator to provide positive, reliable control through the entire stroke of the valve. Should a failure of hydraulic power occur, this valve will remain in position.

FLS-DAN API 6A Double-Acting Actuated Drilling Gate Valve


  • Double acting actuator that requires hydraulic power to both open and close, providing positive control during operations
  • Balancing stem that allows gate to stay in position unless hydraulic power is supplied to actuator to positively open or close valve
  • Forged valve body available in pressure ratings from 3,000 to 15,000 psi and bore sizes from 1 13/16 to 4 1/16 in
  • Positive metal-to-metal sealing (gate-to-seat and seat-to-body)
  • Bidirectional flow that provides usage versatility and increased service life
  • Two spring-loaded, pressure-energized, nonelastomeric lip seals between each seat and body, which assist in low-pressure sealing and protect against intrusion of particle contaminants into the body cavity and seal areas
  • Stem seal design that covers a wide range of pressures, temperatures, and fluids encountered in wellhead and manifold service
  • Metal-to-metal bonnet seal
  • Stem that can be backseated to allow stem seal replacement with the valve under pressure
  • Grease injection fitting downstream of stem back seat for increased safety and fitting in bonnet that helps eliminate body penetration
  • Manual locking screw that maintains the gate (valve) in the closed position without any operating pressure in the actuator
  • Use of socket head cap screws to tie down actuator head flanges, reducing area exposed to corrosive environments