Control Valves
5 in-depth engineering guides on Control Valves — specification, selection, testing and procurement.
Everything on Control Valves
Vajra's engineering team has published 5 technical guides covering Control Valves for industrial valve selection, specification, testing and procurement. Browse the full set below.
Desuperheater and Spray Water Valves: Steam Temperature Control Design Guide
Desuperheater spray water valves control steam temperature in power plants and process steam systems. They face extreme rangeability, cavitation, and fast-response demands that ordinary control valves cannot meet.
Severe Service Control Valves: Anti-Cavitation, Anti-Noise & Multi-Stage Trim
When pressure drops are extreme, standard control valve trim cavitates, flashes, or screams. Severe-service trim manages energy in stages to protect the valve and the downstream pipe. This guide explains the failure mechanisms and the trim that defeats them.
Valve Positioner Types & Selection Guide - Pneumatic, Electro-Pneumatic, Digital
Valve positioners ensure control valves reach exact positions despite friction and pressure forces - this guide covers all positioner types from simple pneumatic to digital HART and Foundation Fieldbus.
Valve Sizing: Cv and Kv Calculation Guide for Industrial Valves
Cv (imperial) and Kv (metric) are the universal measures of valve flow capacity - this guide covers the sizing equations for liquid and gas service, cavitation check, and control valve rangeability.
Valve Sizing for Control Valves - Cv, Kv, and Pressure Drop Calculation
Correctly sizing a control valve prevents oversizing (poor rangeability, instability) and undersizing (insufficient flow). This guide explains Cv, Kv, pressure drop, and the ISA/IEC sizing equations with worked examples.
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