Control Valve vs Pressure Regulator: Differences and Selection Guide
Compare control valves and pressure regulators by control principle, external utilities, droop, remote setpoint, automation, fail action and typical industrial pressure-control applications.
Control Valve Leakage Classes: Class II, III, IV, V and VI Explained
Learn how control valve leakage Classes II through VI differ, why Class VI is not absolute zero leakage, and how seat material, actuator force and test conditions affect shutoff performance.
Equal Percentage vs Linear Control Valve: Inherent vs Installed Characteristics
Learn how equal-percentage and linear control valve characteristics change after installation, how rangeability differs from process turndown, and how to select the correct trim from system pressure drop and predicted travel.
How to Size a Control Valve: Cv, Kv, Flow Cases and Valve Travel
Learn how to size a control valve using minimum, normal and maximum flow conditions, Cv or Kv, pressure drop, predicted valve travel and severe-service checks.
Control Valve Selection Guide: Body Style, Trim, Actuator and Severe Service
A practical control valve selection guide covering body styles, pressure-temperature ratings, trim construction, severe-service risks, leakage classes, actuators, accessories and project inspection requirements.
Valve Actuator Selection Guide: Pneumatic, Electric and Hydraulic Systems
This practical valve actuator selection guide explains how to select pneumatic, electric or hydraulic actuation by valve motion, operating torque or thrust, available utilities, fail action, control mode, duty, environment, mounting interface and package testing requirements.