Gulf Oil & Gas International supplies the Xtralis VESDA VSP-031 VLI secondary foam filter for VLI-880/885 early warning aspirating smoke detectors in control rooms, server areas and utilities. Paired with VSP-030 primary filter, it provides advanced two-stage filtration to trap larger particulates and ensure clean air reaches the detection chamber. Simple field replacement preserves absolute smoke detection accuracy. Key spare for: Oil & gas VESDA dust filtration, data center air monitoring, industrial VLI maintenance.