fugitive emissions
6 in-depth engineering guides on fugitive emissions — specification, selection, testing and procurement.
Everything on fugitive emissions
Vajra's engineering team has published 6 technical guides covering fugitive emissions for industrial valve selection, specification, testing and procurement. Browse the full set below.
Fugitive Emissions from Valves - ISO 15848-1, API 641, Low-E Packing Guide
ISO 15848-1 Class A valves leak < 10 ppm methane equivalent - this guide explains fugitive emission classification, low-E packing design, live loading, and LDAR programme compliance.
Bellows Seal Valve Guide: Eliminating Fugitive Emissions to ISO 15848 Class A
Bellows seal valves use a welded metal bellows to eliminate stem packing as the primary seal, achieving ISO 15848 Class A fugitive emission levels (≤50 ppmv) mandated by EU IED and EPA Method 21.
Valve Selection for Chemical Plants: Materials, Standards & Fugitive Emissions
Chemical plants handle acids, alkalis, solvents, and highly toxic fluids - valve material failures cause catastrophic releases. This guide covers the material selection matrix for corrosive chemical service, NACE MR0103 requirements for refinery service, fugitive emissions ISO 15848 compliance, and the role of polymer-lined valves.
Valve Packing Types and Fugitive Emissions - PTFE, Graphite, Bellows Seal
Fugitive emissions through valve stem packing are a major concern for environmental compliance, workplace safety, and process integrity. Modern packing designs - from standard PTFE chevron to live-loaded graphite and zero-leakage bellows seal - each have specific application ranges. This guide explains the options and when each is required.
Fugitive Emissions from Industrial Valves: ISO 15848, API 641, and Low-E Stem Sealing
Valve stem and shaft seals are the leading source of process plant fugitive emissions of VOCs, methane, and toxic gases. ISO 15848, API 641, and EPA LDAR regulations define the test methods and acceptance criteria for low-emission (Low-E) valves now mandated across the oil, gas, and chemical industries.
Valve Packing and Gland Maintenance: A Practical Engineering Guide
Valve packing is the primary stem seal that prevents process fluid from leaking to atmosphere along the valve stem. Selecting the right packing material, correctly loading the gland, and re-packing without taking the valve out of service are critical maintenance skills for safe and environmentally compliant plant operations. This guide covers packing types, fugitive emission standards, and step-by-step maintenance procedures.
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