metal seat
3 in-depth engineering guides on metal seat — specification, selection, testing and procurement.
Everything on metal seat
Vajra's engineering team has published 3 technical guides covering metal seat for industrial valve selection, specification, testing and procurement. Browse the full set below.
Fire-Safe Ball Valves: API 607 Testing, Metal Seat Secondary Seal & ATEX Certification
A fire-safe valve must maintain acceptable external leakage rates even after all polymeric seats, seals, and packing have been burned away in a 750°C–1000°C flame for 30 minutes. This guide covers API 607 fire test requirements, the burn-out test protocol, metal seat secondary seal design, graphite packing backup, and ATEX/IECEx certification requirements for hazardous area valve actuators.
Valve Trim Selection: Soft Seat vs Metal Seat - A Technical Guide
Choosing between soft seat and metal seat trim is one of the most critical decisions in valve specification. Soft seats provide bubble-tight shut-off but are limited by temperature and abrasion; metal seats endure extreme temperatures and erosive service but require tighter machining tolerances. This guide breaks down the key differences.
Triple-Offset Butterfly Valves: Design, Standards, and Applications
Triple-offset butterfly valves (TOBVs) represent the highest performance tier of the butterfly valve family - eliminating rubbing contact during operation, providing metal-to-metal bubble-tight shut-off, and qualifying for fire-safe service per API 607. This guide explains the three geometric offsets, compares TOBV to double-offset designs, and covers key selection criteria.
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