seat leakage
3 in-depth engineering guides on seat leakage — specification, selection, testing and procurement.
Everything on seat leakage
Vajra's engineering team has published 3 technical guides covering seat leakage for industrial valve selection, specification, testing and procurement. Browse the full set below.
Industrial Valve Troubleshooting: 12 Common Problems and How to Fix Them
Valve failures account for a significant share of unplanned plant downtime. Most failures fall into 12 identifiable patterns with known root causes. This guide covers each problem, its most likely causes, and the recommended fix - from packing replacement to seat re-lapping.
BS 6755 Valve Testing Standard: Explained for Engineers and Procurement Teams
BS 6755 is the British Standard specifying production testing requirements for industrial valves - covering shell pressure tests and seat leakage tests. This guide explains the two parts of BS 6755, test pressures, test durations, leakage acceptance criteria, and how the standard compares to the widely used API 598.
Valve Leakage Classes: ANSI FCI 70-2 and API 598 Explained
When a valve specification says 'Class VI shut-off' or 'API 598 tested', what does that actually mean? Leakage class standards define the maximum allowable seat leakage during factory acceptance testing and set the performance benchmark for valve procurement and QC. Understanding these standards prevents over-specification (unnecessary cost) and under-specification (unsafe operation).
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