Tilting Disc Check Valve - Bonnetless | Fluitek | Philippopoulos s.a.
Tilting Disc Check Valve - Bonnetless | Fluitek | Philippopoulos s.a.
Tilting Disc Check Valve - Bonnetless | Fluitek | Philippopoulos s.a.
Tilting Disc Check Valve - Bonnetless | Fluitek | Philippopoulos s.a.
Tilting Disc Check Valve - Bonnetless | Fluitek | Philippopoulos s.a.
Tilting Disc Check Valve - Bonnetless | Fluitek | Philippopoulos s.a.

Tilting Disc Check Valve - Bonnetless | Fluitek

Fluitek Bonnetless – Tilting Disc Check Valve

The Fluitek Bonnetless is a tilting disc check valve, also referred to as an equilibrated disc check valve. The disc remains open under balanced flow conditions and rotates towards the seat when reverse flow occurs. This design aims to reduce slam compared to conventional swing check valves by utilizing the disc’s dynamic response to flow reversal.

Bonnetless Construction

For lower ANSI pressure classes, typically Class 150 and Class 300, tilting-disc valves are often manufactured with a bolted bonnet and a 45° angled body connection. The Fluitek Bonnetless version eliminates the bonnet bolting, reducing potential external leakage points from bonnet gaskets or fasteners. Internal access requires valve removal from the line.

Dimensions and Pressure Class

Technical data sheet example: ANSI Class 150, flanged ends:

  • Sizes: 4" to 30"
  • Bore diameter: 86 to 700 mm
  • End-to-end: 216 to 1524 mm
  • Weight: 20 to 1991 kg

Manufacturer can adapt dimensions to project requirements.

Media and Applications

Suitable for liquid or gas lines where reverse flow may impact pumps, compressors, heat exchangers, or upstream equipment. Typical use in water networks, process utilities, petrochemical plants, power generation, and heavy industrial piping. Material selection should consider pressure, temperature, flow velocity, corrosiveness, and seat tightness requirements.

Selection Considerations

No actuator is provided. Operation is by flow and disc dynamics/gravity. For large DN or pump stations, evaluate transient effects, closing time, and allowable reverse velocity.

Certifications

Certifications listed: ISO 9001:2015, PED 2014/68/EU, ATEX 2014/34/EU, IEC 61508 SIL, API 6A / ISO 10423, API 6D, API 6DSS, TR-CU.

FAQ

When is bonnetless construction selected?
When a tilting-disc check valve is required without a bolted bonnet-to-body connection.

Is it the same as a swing check?
No. The tilting disc closes by rotating to the seat with different dynamic response compared to swing check valves.

Datasheet and documents

Description

Tilting disc check valves, otherwise called “equilibrated disc check valves”, have the well known features of a typical “no slam” behavior. The disc is maintained open in equilibrium by the fluid flow and when it stops the reversed flow makes the disc move to the closed position by rotating it against the seat, not slamming into it as it happens in a swing check valve.

Such a valve is obtained in case of lower range pressure classes (ANSI 150# and 300#) in the so called bolted bonnet configuration. Indeed the body (cast construction) is in two halves with a bolted connection at 45 degrees angle in relation to the horizontal axis of the valve.

FLUITEK ORSENIGO VALVES has a unique design that eliminates that bolted connection (and consequent possible leakages to the external) while maintaining the basic features of the tilting disc. No change in possible maintenance necessities: both configurations require disassembling of the valve from the line to access to the internals.

Certifications

Fluitek SRL Company Quality Policy 11-2022 – ENG