ESD
5 in-depth engineering guides on ESD — specification, selection, testing and procurement.
Everything on ESD
Vajra's engineering team has published 5 technical guides covering ESD for industrial valve selection, specification, testing and procurement. Browse the full set below.
Solenoid Valves for Valve Automation: Selection, NAMUR and Hazardous-Area Guide
The solenoid valve is the electrical-to-pneumatic link that makes an actuated valve stroke. This guide covers direct-acting vs pilot-operated designs, 3-way and 5-way functions, NAMUR mounting, and hazardous-area certification.
Flare and Blowdown System Valve Selection: ESD, Isolation and Relief Guide
The flare and blowdown system is a plant's last line of overpressure defence. This guide covers blowdown valves, flare-header isolation, fail-safe ESD action, and the API 521/537 framework that governs them.
Valve Actuator Fail-Safe Action: Fail-Closed, Fail-Open, and Fail-Last
Fail-safe action defines what an actuated valve does on loss of power or signal: move to closed, move to open, or stay in place. Choosing the correct fail direction is a fundamental process-safety decision. This guide explains fail-closed, fail-open, and fail-last actuation and how to select the right one.
HIPPS Valves: High Integrity Pressure Protection System Design and Selection
A High Integrity Pressure Protection System replaces or supplements relief valves by closing off the source of overpressure before a rupture can occur. This guide covers the final-element valve requirements that make a HIPPS certifiable.
Valve Interlock Systems: Mechanical Key Interlocks for Safe Operation
Mechanical valve interlocks enforce a safe, predetermined sequence of valve operations using a trapped-key principle - preventing operator error in high-risk procedures like pig launching, vessel isolation, and pressure relief. This guide explains how they work and where to use them.
Related topics
Need valves engineered for ESD?
Our engineering team writes these guides and supplies the valves. Send your requirement for a specification review and a 24-hour quote.