Tilting Disc Check Valve - Pressure Seal Bonnet | Fluitek | Philippopoulos s.a.
Tilting Disc Check Valve - Pressure Seal Bonnet | Fluitek | Philippopoulos s.a.
Tilting Disc Check Valve - Pressure Seal Bonnet | Fluitek | Philippopoulos s.a.
Tilting Disc Check Valve - Pressure Seal Bonnet | Fluitek | Philippopoulos s.a.

Tilting Disc Check Valve - Pressure Seal Bonnet | Fluitek

Fluitek Pressure Seal Bonnet – Tilting Disc Check Valve

The Fluitek Pressure Seal Bonnet is a tilting disc check valve designed for high-pressure pipelines. Also referred to as an equilibrated disc non-return valve, it is typically installed in series with on/off valves to prevent reverse flow in piping systems during flow interruption.

Operation

Disc position is maintained open by process flow. Upon flow reduction or stoppage, the disc returns to the seat without abrupt impact, minimizing slam compared to conventional swing check valves. Operation is purely mechanical, with no actuator required.

Construction and Pressure Rating

  • Type: Tilting disc check valve with pressure seal bonnet
  • End connection: typically butt weld
  • Design standards: ASME B16.34 or EN 12516
  • Pressure classes: ANSI Class 600, 900, 1500, 2500
  • Body construction: cast or forged
  • Materials: carbon steel, low alloy steel, modified 9% Cr alloys, austenitic stainless steels, nickel alloys

Indicative Sizing

Technical datasheets provide examples for ANSI Class 1500, with sizes from 3" to 24"; larger sizes available on request. End-to-end BW lengths and weights increase significantly at higher DN, requiring verification of pipe supports and weld-end loads.

Applications

Used in high-pressure steam, boiler feedwater, thermal fluids, oils, chemically compatible media, and process lines with high pressure ratings. Material selection is based on design pressure, temperature, corrosion, flow velocity, and seat tightness requirements.

Standards / Certifications

Referenced standards: 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 a pressure seal bonnet selected?
For high-pressure applications where bonnet sealing must withstand elevated pressure ratings.

When is special sizing verification required?
For large diameters, low flow rates, pump stations, or lines with transient flow phenomena.

Standard (Options)
  • ANSI
Connection (Options)
  • Butt Weld
Material (Options)
  • Carbon Steel
  • Austenitic Stainless Steel
  • Low Alloy Steel
  • Nickel Alloys
Pressure Rating (Options)
  • 600 lbs
  • 900 lbs
  • 1500 lbs
  • 2500 lbs

Datasheet and documents

Description

This type of valve (also called “equilibrated disc non return valve”) is coupled with on-off valves in high pressure lines to protect the system from the fluid reversing flow, when regular flow is stopped.

The characteristic of this valve is “non slamming”. The disc, with its shape, is maintained in the open position by the fluid flow and its return to closed position does not cause a sudden violent hit against the seat. Design can be to ASME B16.34 but, also, to EN 12516.

Cast body construction and forged body construction are both available. Materials range from carbon steel to low alloy steel (including the widely used modified 9% Cr alloys) to austenitic stainless steels, to nickel alloys. Pressure classes (per ANSI standard) are normally ranging from 600# to 900#, 1500# and 2500#. Size range depends on pressure class requirements, FLUITEK ORSENIGO VALVES having no limits in relation to market requirements.

Certifications

Fluitek SRL Company Quality Policy 11-2022 – ENG