Check Valve - Piston Type Pressure Seal Bonnet | Fluitek | Philippopoulos s.a.
Check Valve - Piston Type Pressure Seal Bonnet | Fluitek | Philippopoulos s.a.
Check Valve - Piston Type Pressure Seal Bonnet | Fluitek | Philippopoulos s.a.
Check Valve - Piston Type Pressure Seal Bonnet | Fluitek | Philippopoulos s.a.

Check Valve - Piston Type Pressure Seal Bonnet | Fluitek

Fluitek – Piston Check Valve with Pressure Seal Bonnet

The Fluitek Pressure Seal Bonnet is a piston check valve designed for high-pressure, high-temperature service, typically found in power generation, steam, and process lines. The valve features a Y-pattern body, with the piston lift axis inclined relative to the flow, enabling lift check operation under elevated pressure ratings.

Construction and Variants

  • Type: Piston check valve with pressure seal bonnet.
  • Body: Forged or cast, depending on size and project specification.
  • Piston: Available with or without spring, based on application requirements.
  • End Connections: Typically butt weld ends.
  • Materials: Carbon steel, low alloy steel, austenitic stainless steel, duplex, and nickel alloys per ASTM/ASME or EN standards.

Pressure Classes

Primarily covers high ANSI classes: Class 900, 1500, and 2500. Intermediate and special designs up to Class 4500 available. For example, Class 2500 covers sizes from 2" to 12"; larger diameters are evaluated case by case.

Media and Applications

Suitable for steam, water, gases, and oils. Final selection depends on body material, design temperature, pressure, and chemical compatibility. Typical applications include:

  • Main steam and boiler feedwater lines
  • High-pressure bypass lines
  • Pump and compressor reverse flow protection
  • Power generation units
  • Refinery and high-rating process units

Selection Considerations

Valve selection requires more than pipe diameter: flow rate, density, inlet/outlet pressure, temperature, fluid phase, and allowable pressure drop must be specified. Fluitek offers flow simulation to verify hydraulic behavior at defined operating points.

Standards / Certifications

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

FAQ

Actuator option? No actuator. Operates via process differential pressure.
When is pressure seal bonnet preferred? For high-pressure applications where bonnet sealing utilizes internal pressure.
Suitable for low flow rates? Requires evaluation. Low flow may cause unstable piston movement.

Datasheet and documents

Description

The swing check valves and the tilting disc type check valves are not the only ones used in the high pressure, high temperature lines, typical of the power and steam generation industries. The process industry sometime also uses the herebelow described product. FLUITEK ORSENIGO VALVES can offer a piston type check valve line for high pressure, high temperature service. Construction is with Y-pattern (lifting direction inclined versus fluid centerline). Both forged and cast body construction are available.

Piston is either spring loaded or not, depending on customer choice. Ends configuration is quite normally with butt weld ends. Materials are to ASTM/ASME standards or EN standards, either harmonized or not, ranging from carbon steels, to low alloy steels, to austenitic stainless steels, to austenitic-ferritic stainless steels (duplex), to nickel alloys.

FLUITEK ORSENIGO VALVES offers, as a special added on feature, the possibility of simulating the fluidodynamic behavior of this type of valve, determining its proper functioning at certain specified flow rates, with customer furnished data of fluid conditions.

Certifications

Fluitek SRL Company Quality Policy 11-2022 – ENG