FIG 244O
Female Threaded Emergency Vents
Vents | Emergency Vents
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Capabilities244OM
UL Listed emergency vent (pressure relief only) used on aboveground storage tanks, as a code requirement, to help prevent the tank from becoming over-pressurized and possibly rupturing if ever exposed to fire. The vent must be used in conjunction with a “normal vent.” Correct application of this vent requires proper vent size and selection for the tank system in order to meet the specific venting capacity.
WARNINGS: The 244 emergency vent is for emergency pressure relief only and must be used in conjunction with a normal vent or pressure vacuum vent such as a Morrison 354, 548,748, 749 or 922. The 244 emergency vent must be properly sized and selected for each specific tank application in order to meet the proper venting capacity requirements. See the Morrison Vent Guide for further instructions.
WARNING: DO NOT FILL OR UNLOAD FUEL FROM A STORAGE TANK UNLESS IT IS CERTAIN THAT THE TANK VENTS WILL OPERATE PROPERLY. Morrison tank vents are designed only for use on shop fabricated atmospheric tanks which have been built and tested in accordance with UL 142, NFPA 30 & 30A, and API 650 and in accordance with all applicable local, state, and federal laws. In normal operation, dust and debris can accumulate in vent openings and block air passages. Certain atmospheric conditions such as a sudden drop in temperature, below freezing temperatures, and freezing rain can cause moisture to enter the vent and freeze which can restrict internal movement of vent mechanisms and block air passages. All storage tank vent air passages must be completely free of restriction and all vent mechanisms must have free movement in order to insure proper operation. Any restriction of airflow can cause excessive pressure or vacuum to build up in the storage tank, which can result in structural damage to the tank, fuel spillage, property damage, fire, injury, and death. Monthly inspection, and immediate inspection during freezing conditions, by someone familiar with the proper operation of storage tank vents, is required to insure venting devices are functioning properly before filling or unloading a tank.
Code Compliance
When properly sized for the tank, this vent will conform to the requirements of the International Fire Code; National Fire Code of Canada; National Fire Protection Agency—NFPA 20, 30, 30A, 31, 37, 110; Petroleum Equipment Institute—PEI RP200, PEI RP800; Underwriters Laboratories Inc.—UL-142, UL-2085, UL-2244; Underwriters Laboratories of Canada—CAN/ULC S601, CAN/ULC S602, CAN/ULC S652
Approvals
California Air Resource Board (CARB) Phase 1 Enhanced Vapor Recovery (EVR) AST Certified Products (VR-402-B); Underwriters Laboratories Inc. UL-2583
Fig | Suffix | Size | Description | Weight |
244OM | 0020 AV | 2” 8oz/sq.in. | Emergency Vent - Male Thread - Brass- w/O-Ring - UL&ULC | 1 |
244OMB | 0020 AV | 2” 8oz/sq.in. | Emergency Vent - Male British Pipe Thread - Brass - w/O-Ring - UL&ULC | 1 |
244OMA | 0020 AV | This model is no longer available. Refer to 245M—0200 AV for equivalent. | ||
244OMAS | 0020 AV | This model is no longer available. Refer to 245MS-0200 AV for equivalent. | ||
244OMAB | 0020 AV | This model is no longer available. Refer to 245MB-0200 AV for equivalent. | ||
244OMABS | 0020 AV | This model is no longer available. Refer to 245MSB0200 AV for equivalent. | ||
244OMS | 0020 AV | 2” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring - w/Screen - UL&ULC Listed | 1 |
244OMBS | 0020 AV | 2” 8oz/sq.in. | Emergency Vent - Male BSP Thread - w/O-Ring - w/Screen - UL&ULC Listed | 1 |
244OMA | 0030AVEVR | 2” 16oz/sq.in. | Emergency Vent - Alum. Body -Male Thds - w/O-Ring - UL&ULC, EVR App. | 0.4 |
244OMAS | 0030AVEVR | 2” 16oz/sq.in. | E -Vent - Alum. Body -Male Thds - w/O-Ring - W/Screen - UL&ULC-EVR App. | 0.4 |
244OM | 0050 AV | 3” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC Listed | 7 |
244OMS | 0050 AV | 3” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC Listed, w/Screen | 7 |
244OM | 0060 AV | 3” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC Listed | 11 |
244OM | 0060AVEVR | 3” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL&ULC Listed, EVR Approved | 11 |
244OMS | 0060 AV | 3” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC Listed, w Screen | 11 |
244OMS | 0060AVEVR | 3” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC Listed, w Screen, EVR | 11 |
244OM | 0100 AV | 4” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC | 10 |
244OMB | 0100 AV | 4” 8oz/sq.in. | Emergency Vent - BSP Male Thread - w/O-Ring, UL & ULC | 10 |
244OMS | 0100 AV | 4” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring - w/Screen, UL & ULC | 10 |
244OMSB | 0100 AV | 4” 8oz/sq.in. | Emergency Vent - Male British Pipe Thread - w/O-Ring - w/Screen, UL&ULC | 10 |
244OM | 0170 AV | 4” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC | 19 |
244OM | 0170AVEVR | 4” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC, EVR Approved | 19 |
244OMS | 0170AVEVR | 4” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, Nickel Plated | 19 |
244OMB | 0170 AV | 4” 16oz/sq.in. | Emergency Vent - BSP Male Thread - w/O-Ring, UL & ULC | 19 |
244OMBS | 0170 AV | 4” 16oz/sq.in. | Emergency Vent - BSP Male Thread - w/O-Ring, w/Screen UL & ULC | 19 |
244OMS | 0170 AV | 4” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring - w/Screen, UL & ULC | 19 |
244OMS | 0170AVEVR | 4” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring - w/Screen, UL & ULC, EVR Approved | 19 |
244OM | 0800 AV | 5” 8 oz | Emergency Vent - Male Threaded w/O-Ring - UL&ULC | 15 |
244OMS | 0800 AV | 5” 8 oz | Emergency Vent - Male Threaded w/O-Ring, w/Screen - UL&ULC | 15 |
244OM | 0900 AV | 5” 16 oz | Emergency Vent - Male Threaded w/O-Ring - UL&ULC | 28 |
244OM | 0900AVEVR | 5” 16 oz | Emergency Vent - Male Threaded w/O-Ring - UL&UL, EVR Approved | 28 |
244OMS | 0900 AV | 5” 16 oz | Emergency Vent - Male Threaded w/O-Ring, w/Screen - UL&ULC | 28 |
244OMS | 0900AVEVR | 5” 16 oz | Emergency Vent - Male Threaded w/O-Ring, w/Screen - UL&ULC, EVR Approved | 28 |
244OM | 0200 AV | 6” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC | 20 |
244OM | 0200AVEVR | 6” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC, EVR Approved | 20 |
244OMS | 0200AVEVR | 6” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, W/Screen,UL & ULC, EVR App. | 20 |
244OMBSP | 0200 AV | 6” 8oz/sq.in. | Emergency Vent - Male British Pipe Thread - w/O-Ring, UL & ULC Listed | 20 |
244OMS | 0200 AV | 6” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring - w/Screen, UL & ULC | 20 |
244OMS | 0200AVEVR | 6” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring - w/Screen, UL & ULC, EVR Approved | 20 |
244OMSB | 0200 AV | 6” 8oz/sq.in. | Emergency Vent - Male British Pipe Thread - w/O-Ring - w/Screen, UL&ULC | 20 |
244OM | 0400 AV | 6” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC | 37 |
244OM | 0400AVEVR | 6” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC, EVR Approved | 37 |
244OMS | 0400AVEVR | 6” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, W/Screen, UL & ULC, EVR App. | 37 |
244OMBSP | 0400 AV | 6” 16oz/sq.in. | Emergency Vent - Male British Pipe Thread - w/O-Ring, UL & ULC Listed | 37 |
244OMS | 0400 AV | 6” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring - w/Screen, UL & ULC | 37 |
244OMS | 0400AVEVR | 6” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring - w/Screen, UL & ULC, EVR Approved | 37 |
244OM | 0600 AV | 8” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC | 44 |
244OM | 0600AVEVR | 8” 8oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC, EVR Approved | 44 |
244OMBSP | 0600 AV | 8” 8oz/sq.in. | Emergency Vent - Male British Pipe Thread - w/O-Ring, UL & ULC Listed | 44 |
244OM | 0700 AV | 8” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC | 63 |
244OM | 0700AVEVR | 8” 16oz/sq.in. | Emergency Vent - Male Thread - w/O-Ring, UL & ULC, EVR Approved | 63 |
244OMBSP | 0700 AV | 8” 16oz/sq.in. | Emergency Vent - Male British Pipe Thread - w/O-Ring | 67 |
244OMI | 0700 AV | 8” 16oz/sq.in. | Emergency Vent - Male Thread - O-Ring & Iron Body, UL & ULC Listed | 71 |