Extraction Steam Check Valves

HEVC extraction steam check valves provide non-return protection for steam-turbine extraction lines and feedwater-heater systems. Fast-closing duty, actuator logic and fail action are reviewed for turbine trip, load rejection and heater upset conditions. Valve size, pressure rating and closing-time requirements are confirmed for the project.

Extraction Steam Check Valve Specifications

Product type: power-generation extraction steam check valve
Function: fast-closing non-return protection against steam or water backflow
Service: turbine extraction lines and feedwater-heater extraction systems
Size and pressure class: project-specific; factory confirmation required
Closing time: qualified against project requirements
Actuator logic and fail action: project-specific

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Description

Power Generation Applications

Steam-Turbine Extraction Lines

Non-return protection for turbine extraction piping to limit reverse steam or water flow under specified upset conditions.

Feedwater-Heater Extraction

Extraction-line protection in feedwater-heater systems, coordinated with heater operating conditions and turbine-protection requirements.

Turbine Trip & Load Rejection

Fast-closing duty during turbine trip or load rejection, with required closing response and actuator logic qualified for the installation.

Cogeneration Extraction Systems

Non-return service in cogeneration extraction circuits, selected for the steam conditions and operating philosophy.

Extraction Steam Check Valve Selection

Specify extraction steam conditions, size, pressure rating, flow range, installation orientation, required closing time, actuator logic, fail action and turbine-protection interfaces. Ratings from the related base check-valve platform are not used as extraction-valve ratings.

Standards, Testing & Project Documentation

Typical project basis includes ASME B16.34, ASME B16.10, ASME B16.25 / B16.5 / B16.47 and API 598, with ASME B31.1 applied at piping-system level. Closing time, actuator logic, fail action and endurance testing must be qualified for the project.

Project-Specific Engineering Requirements

Closing ResponseProject-qualified closing time

Protection LogicActuator logic and fail action

Exact size, pressure class and closing-time values require factory confirmation for the quoted configuration.