2025 UL Ordering Catalog - Flipbook - Page 58
SPECIFICATIONS
Approvals /
Certifications
−
UL 2583 listed and ULc listed, MH21090
Components
−
CARB certified, VR-101-U (FE) and VR-102 (OPW®)
1
−
ATEX 2014/34/EU approved
2
−
EN13616 certified
−
KIWA BRL-K636/03 certified
Dimensions
3.97"
(101 mm)
• Pre-flanged aluminum top drop tube
• Roll-crimped top fitting/drop tube
3• Protective float sleeve
4• Float (shielded by float sleeve)
5• Valve assembly
6• Magnetically-coupled actuator
7• Threaded bottom drop tube
1.75"
(44.5 mm)
95%
Shutoff
Level
1
Grade Level
2
17.40"
(442 mm)
18.40"
(467 mm)
Tank Top
4
5
3
95% of Tank
Volume
6
7
Tank Bottom
6" (152 mm)
Maximum
Operation
As the liquid level in the UST approaches 95% capacity, the liquid
level raises the float. As the float rises it actuates the external/
internal magnetic couplers which release the flapper to be closed
by the flow of product. As the float continues to rise, the internal
mechanism pushes the flapper further into the product flow to
allow actuation at high or low flow rates. This sudden reduction in
flow caused by the primary flapper closing creates “line shock” to
the fill hose which signals the delivery driver that the tank is nearing
95% capacity. As the float continues to rise to the 95% fill level, the
secondary closes, completely stopping the flow of fuel.
58
Defender Series® Overfill Prevention Valve
