FLS-R Large-Bore HP API 6A Slab-Style Gate Valve | Schlumberger
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FLS-R

Large-bore HP API 6A slab-style gate valve

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The FLS-R gate valve is our premier gate valve that utilizes the latest technology in component design and materials. The FLS-R has a unique ball-screw and lower balancing stem mechanism that greatly reduce the torque required for operation. Field-proven performance, combined with ease of use, makes this valve ideally suited for large-bore and high-pressure environments in production, manifold, and fracturing applications.

FLS-R Large-Bore HP API 6A Slab-Style
FLS-R
Large-bore HP API 6A slab-style gate valve

Advantages

  • Simple, reliable gate and seat design that promote ease of field service and minimal spare parts inventory
  • Unique ball-screw design that allows for rolling friction in place of sliding friction
  • Bidirectional design that provides flow direction versatility and increased service life
  • Seal diameters and bearing areas of the seats that prevent trapping of pressure inside the valve cavity
  • Lower stem that balances pressure thrust on upper stem to reduce operating torque, which prevents body cavity pressure buildup during operation and provides position indication
  • Metal-to-metal stem backseat on both the balancing stem and valve operator stem for replacement of either stem seal with the valve cavity under pressure
  • Backseat that can be energized to isolate the stem seal stuffing box from line pressure and the grease fitting port used to test the backseat integrity
  • Two spring-loaded, pressure-energized, nonelastomeric lip seals for maximum protection against intrusion of particle contaminants into the valve cavity
  • Seals that improve gate and seat service life, prevent damage to the body seat seal face, and improve valve performance at very low pressures
  • Metal-to-metal sealing at the gate-to-seat and seat-to-body seals
  • Forged body
Nominal Bore Size, in Working Pressures, psi [MPa]
2,000 [13.8] 3,000 [20.7] 5,000 [34.5] 10,000 [69.0] 15,000 [103.5] 20,000 [138.0] 30,000 [206.8]
1 13/16 - - - FLS valve FLS valve FLS valve FLS and FLS-R valve
2 1/16 FL and FLS valve FL and FLS valve FL and FLS valve FLS valve FLS valve FLS valve -
2 9/16 FL and FLS valve FL and FLS valve FL and FLS valve FLS valve FLS valve FLS valve FLS and FLS-R valve
3 1/16 - - - FLS valve FLS valve FLS and FLS-R valve -
3 1/8 FL and FLS valve FL and FLS valve FL and FLS valve - - - -
4 1/16 - - - FLS valve FLS and FLS-R valve FLS and FLS-R valve -
4 1/8 FL and FLS valve FL and FLS valve FL and FLS valve - - - -
5 1/8 FLS valve FLS valve FLS valve FLS and FLS-R valve FLS and FLS-R valve - -
6 3/8 FLS valve FLS valve FLS valve FLS and FLS-R valve FLS and FLS-R valve - -
7 1/16 - - FLS valve FLS and FLS-R valve FLS and FLS-R valve - -
9 - - FLS and FLS-R valve FLS and FLS-R valve FLS and FLS-R valve - -
11 - - FLS and FLS-R valve - - - -

For FL, FLS, and FLS-R gate valves, this chart represents typical valves for

  • API material classes AA, BB, CC, DD, EE, FF, and HH (except FL)
  • temperature ratings K, L, P, S, T, U, and V
  • product specification levels 1, 2, 3, 3G, and 4.

For other designs, please contact us.

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