ESD
3 in-depth engineering guides on ESD — specification, selection, testing and procurement.
Everything on ESD
Vajra's engineering team has published 3 technical guides covering ESD for industrial valve selection, specification, testing and procurement. Browse the full set below.
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.
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