control valve
4 in-depth engineering guides on control valve — specification, selection, testing and procurement.
Everything on control valve
Vajra's engineering team has published 4 technical guides covering control valve for industrial valve selection, specification, testing and procurement. Browse the full set below.
Anti-Surge Valves for Centrifugal Compressors: Design and Selection Guide
Anti-surge valves protect centrifugal compressors from the destructive flow reversal known as surge by rapidly recycling gas back to the suction. This guide covers surge physics, the demanding requirements on stroke speed, trim, and sizing, and how to select a reliable anti-surge valve.
Globe Valve Applications: Steam, Throttling and Control Service Guide
Globe valves are the preferred choice for throttling, flow regulation, and steam isolation - their disc-to-seat geometry provides a stable, controllable flow characteristic that gate and ball valves cannot match.
Control Valve Selection Guide: Cv Calculation, Types & Actuators
Control valves are the workhorses of process automation - incorrect sizing or wrong valve type causes instability, cavitation, and premature wear. This guide covers Cv/Kv calculation methodology, IEC 60534 liquid and gas sizing, globe vs butterfly vs cage valve selection, trim characterisation, and positioner specification.
Control Valve Sizing and Cv Calculation: A Step-by-Step Engineering Guide
Control valve sizing is the most critical step in ensuring stable and accurate process control. An oversized valve operates at low opening and is prone to instability and seat erosion; an undersized valve starves the process and cannot meet maximum flow demand. This guide explains the Cv flow coefficient method, ISA/IEC 60534 equations for liquid, gas and steam, and common sizing pitfalls to avoid.
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