High Temperature
6 in-depth engineering guides on High Temperature — specification, selection, testing and procurement.
Everything on High Temperature
Vajra's engineering team has published 6 technical guides covering High Temperature for industrial valve selection, specification, testing and procurement. Browse the full set below.
FCC Slide Valves: Catalyst Service Valve Selection and Design Guide
Fluid catalytic cracking (FCC) units rely on slide valves to control the circulation of hot catalyst between the reactor and regenerator. Operating above 700 deg C in dense, abrasive catalyst flow, these valves are among the most severe-service valves in any refinery. This guide covers slide valve design, materials, and selection.
High-Temperature Valve Selection Guide - Above 300°C to 600°C
Selecting valves above 300°C requires Cr-Mo alloy steel bodies, Stellite trim, graphite packing, and verification against API 941 Nelson curves - this guide explains every decision point.
Valves for Supercritical and Ultra-Supercritical Steam Power Plants
Supercritical and ultra-supercritical steam plants operating at 565–600°C require P91/P92 Cr-Mo-V alloy gate and globe valves with pressure-seal bonnets and Stellite hard-faced trim.
High-Temperature Valve Selection Guide - Above 300°C to 650°C
Carbon steel (WCB) is limited to 425°C. Above this temperature, the correct alloy steel grade selection - WC6, WC9, F22, or P91 - is critical for valve integrity in refinery and power plant service.
Metal-Seated Ball Valves for High-Temperature and Abrasive Service
Soft-seat (PTFE/RPTFE) ball valves have an upper temperature limit of 180-200°C continuous service. Above this temperature, or in fire-safe critical applications, metal-seated ball valves are required. Metal seats achieve API 598 Class V and Class VI shutoff through precision lapping of hard metallic seating surfaces, not through elastomeric deformation.
Valve Selection for Power Plants: Steam, Feedwater & Turbine Service
Thermal power plants operate at steam temperatures up to 620°C and pressures exceeding 250 bar. Valve failures in steam service are catastrophic - this guide covers IBR compliance, high-temperature alloy steels, steam trap selection, and turbine bypass specifications for coal, gas, and combined-cycle power stations.
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