On a well under pressure, a gate valve has one job: open fully to let fluid through, and seal completely when it needs to shut off. The INTEGRATED® IFLS™ is a forged, API 6A single seat design slab gate valve built for exactly that duty — in severe production, drilling and fracturing service.
This post looks at what the IFLS™ is, how a single seat slab gate valve works, the features that make it suited to hard service, and its sizes and ratings.
What the IFLS™ Gate Valve Is — and Where It Is Used
The IFLS™ is a single seat slab gate valve that controls fluid flow and pressure across oil and gas operations. It is built for severe service in production, drilling and fracturing, and for wellhead and manifold applications. INTEGRATED® manufactures it as an API 6A monogrammed valve, in both manual and hydraulic-operated versions.
How a Slab Gate Valve Works
The IFLS™ is a slab gate valve: a single, flat gate slides across the bore to open or close the flow path. Its full-bore design gives an unrestricted, line-size opening when open, and floating gate and floating seat designs close to form a positive, metal-to-metal seal. Because it is a bi-directional valve, it seals and controls flow from either direction — useful where flow can come from either side of the valve.
Built for Severe Service
The IFLS™ is engineered for demanding wells and for practical field service:
- Bi-directional design — gives flow-direction versatility and increased valve life.
- Positive metal-to-metal sealing — gate-to-seat and seat-to-body, plus a metal-to-metal bonnet seal.
- Floating gate and seat — simple, reliable designs that ease field service and keep spare-parts inventory low.
- Pressure-energized lip seals — spring-loaded, non-elastomeric seals between each seat and the body that assist low-pressure sealing and keep particle contaminants out of the body cavity.
- Serviceable under pressure — the stem can be back-seated to allow stem-seal replacement with the valve still under pressure, and grease fittings are placed to increase safety and avoid body penetration.
- Reduced-torque operation — easy closing and sealing, with manual or hydraulic operators.
Sizes, Pressures and Specifications
The IFLS™ is offered across a broad range of sizes and pressure classes, so the valve can be matched to the line and the service:
Specification | INTEGRATED® IFLS™ |
|---|---|
Sizes | 2-1/16”, 3-1/8″, 3-1/16″, 4-1/16″, 5-1/8″ and 7-1/16″ |
Pressure Ratings | 2,000 to 15,000 psi |
Operators | Manual or Hydraulic |
Construction | Forged; full bore (internally flushed); metal-to-metal sealing |
Ring grooves | Inconel 625 or SS316 Inlays |
Standards | API 6A monogrammed; NACE MR-0175; API 20E (BSL 1 or 2) bolting |
Qualification / Quality | PR2; up to PSL 3G; Material Class DD to HH; Temperature Class P to +X |
Full part numbers, dimensions and weights for each size and pressure class are set out in the IFLS™ catalog.
Standards and Interchangeability
The IFLS™ is an API 6A monogrammed valve, forged and built to NACE MR-0175, with Inconel 625 inlay ring grooves and API 20E (BSL 1 or 2) bolting. INTEGRATED® manufactures it under API license, and the company’s credentials include API 6A, 16A, 16AR, 16C, 20E, ASME U, CRN, National Board, API Q1 and ISO 9001:2015.
It is a field-proven valve designed for reliability and industry interchangeability, so it can be fitted into service without redesigning it.
Where the IFLS™ Fits in the System
The IFLS™ supports drilling, production, fracturing, wellhead and manifold operations. For the wider picture of pressure-control equipment, see our overview of INTEGRATED® Blowout Preventers.
Maintenance and Repair Kits
A gate valve earns its value over a long service life, and that depends on maintenance. The IFLS™ is designed for it — floating gate and seat, low spare-parts inventory, and stem-seal replacement under pressure. INTEGRATED® also supplies minor and major valve repair kits so seats, seals and stem components can be renewed and the valve kept in service rather than replaced.
Frequently Asked Questions
What is a slab gate valve?
A gate valve that uses a single, flat (slab) gate sliding across the bore to open or close the line — giving an unrestricted, line-size opening when open and a metal-to-metal seal when closed.
What makes the IFLS™ suited to severe service?
Its bi-directional design and positive metal-to-metal sealing, forged construction, Inconel 625 inlay ring grooves and NACE MR-0175 build make it suited to demanding production, drilling and fracturing wells.
What sizes and pressure ratings do the IFLS™ cover?
Sizes from 2-1/16″ to 7-1/16″, with pressure ratings from 2,000 to 15,000 psi, in manual or hydraulic versions.
Can the IFLS™ be serviced under pressure?
The stem can be back-seated to allow stem-seal replacement with the valve under pressure, and grease fittings are positioned to increase safety and avoid body penetration.
Is the IFLS™ interchangeable with existing valves?
Yes. It is a field-proven valve designed for reliability and industry interchangeability.
For severe production, drilling and fracturing service, the right gate valve keeps flow control reliable. Explore the INTEGRATED® IFLS™, or talk to our team about the right configuration for your application.
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