• Severe-Service Control Valves,Honyen,Severe-Service Control Valves | Honyen Power Generation
  • Severe-Service Control Valves,Honyen,Severe-Service Control Valves | Honyen Power Generation

Severe-Service Control Valves

HEVC severe-service control valves regulate steam and feedwater in power-generation systems with high differential pressure, cavitation, erosion or scouring duty. Plunger, sleeve and labyrinth trim options, linear or equal-percentage flow characteristics and pressure classes from Class 150–4500 are reviewed for the specified operating conditions.

Severe-Service Control Valve Specifications

  • Published metric size range: DN40–DN250
  • Pressure: PN16–PN420; Class 150–4500
  • Standards: NB/T 47044; ASME B16.34; GB/T 24925
  • Trim / structure: plunger / sleeve / labyrinth
  • Flow characteristics: linear / equal-percentage
  • Service capability: high differential pressure; anti-cavitation / anti-erosion / anti-scouring
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  • Severe-Service Control Valves,Honyen,Severe-Service Control Valves | Honyen Power Generation

Description

Power Generation Applications

Boiler Feedwater Control

Modulating control of boiler feedwater, with flow range, pressure drop and control requirements used to select the valve and trim.

Steam Pressure Control

Steam-pressure regulation for demanding power-plant service. Steam conditions, capacity and noise requirements guide engineering review.

Minimum-Flow Recycle

Control service for minimum-flow recycle applications, with pump requirements and cavitation risk reviewed against the proposed trim.

High-Pressure Auxiliary Systems

Severe-service steam and water control in auxiliary power-plant circuits subject to high pressure drop or erosion concerns.

Severe-Service Control Valve Selection

Provide minimum, normal and maximum flow; inlet and outlet pressures; fluid temperature and properties; required Cv; allowable noise; shutoff requirements; actuation and fail action. Trim selection is reviewed against cavitation, erosion, pressure drop and thermal transients. The source also lists NPS 1/2–12; this differs from the stated DN range and requires configuration-specific confirmation.

Standards, Testing & Project Documentation

Applicable qualification may include ASME B16.34, ASME B31.1 system integration, IEC 60534 / ISA 75 sizing and performance, project Cv / noise / thermal-transient review, and actuator fail-safe / response testing. SIL applies only when required by the project safety function. Final testing and documentation are confirmed for the quoted configuration.

Selected Power Generation Project References

2 × 660 MW1 selected manufacturer project
2 × 1,000 MW1 selected manufacturer project
2 × 1,050 MW1 selected manufacturer project

Selected manufacturer experience; configuration-specific references are reviewed for the quoted valve.

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