Description
The Morrison Bros 244OM is an emergency pressure-relief vent for aboveground storage tanks, required to prevent ruptures during fire exposure. This UL Listed vent must be used with a normal vent. Available in 2″” to 8″” sizes, it features various pressure settings and thread types to meet strict code requirements.
Features
- Pressure relief only — must be used in conjunction with a normal vent or pressure-vacuum vent
- Available sizes: 2″”, 3″”, 4″”, 5″”, 6″”, 8″”
- Pressure settings: 8 oz/sq.in. or 16 oz/sq.in.
- Connection options: NPT male thread, BSP/British pipe male thread
- Screen option available on most models to prevent debris ingress
- O-ring seal on all models
- Body materials: brass, aluminium, or cast iron (model dependent)
- CARB Phase 1 EVR approved variants available
- UL Listed and ULC Listed
Applications
- Aboveground storage tanks (AST) for petroleum and flammable/combustible liquids
- Tanks built and tested to UL 142, NFPA 30 & 30A, and API 650
- Fuel storage facilities, bulk plants, and service stations
- Applications requiring compliance with IFC, NFPA, PEI, UL, or ULC standards
Certifications & Approvals
- UL Listed: UL-2583
- ULC Listed: CAN/ULC S601, CAN/ULC S602, CAN/ULC S652
- CARB EVR: California Air Resources Board Phase 1 Enhanced Vapor Recovery (VR-402) — select models
- Code Compliance (when properly sized): International Fire Code · National Fire Code of Canada · NFPA 20, 30, 30A, 31, 37, 110 · PEI RP200, PEI RP800 · UL-142, UL-2085, UL-2244
