Norgren 2989-11 - Manual

Performance
Application The 2989-11 high-flow vent is intended to provide tank breathing, prevent fuel spillage, relieve excess
pressure, and provide thermal venting in vehicle fuel tanks for which this valve is appropriate. It is
specifically designed to work with new engines that generate a high volume of vapor returning to the
tank, and to maximize the probability that the vent will re-open even after closure by fuel slosh and
pressurization by returning vapor.
Limitations This tank vent valve is designed for use on diesel fuel aluminum tanks up to 200 gallon total capacity
and diesel fuel steel tanks up to 132 gallon capacity.
Air Venting Designed to vent air at 70 SCFH with a tank pressure not more than 18 inches in H2O. Will vent in excess
of 100 SCFH air without corking (closing).
Unseating Once closed and upright, in the absence of fuel, vent will partially unseat (re-open) at a descending
pressure at or above 40 inches H2O.
Anti-Spill Vent will not leak in excess of 0.5 ounces per minute of diesel with the vent in any orientation and diesel
applied at any pressure up to 4 PSIG.
Thermal Relief At 255°F, vent will thermally activate and open a 0.56 Diameter hole to atmosphere when exposed to
an enveloping flame in accordance with FHWA Title 49, CFR Part 393 Section 67 (d)(1) that causes a fuel
temperature to rise at a rate of at least 6° F per minute.
Pressure Relief Pressure relief feature will start to flow with diesel applied to between 4 and 8 PSIG, and will flow 1.0
GPM or more of diesel with 10 PSIG.
Barb Alignment Barb may be aligned after installation by rotating without disturbing thread alignment.
Material Zamak 3
Weight 64.4 grams (approximate)
Features
Norgren GT Development fuel tank vent is 1/2"
NPT, with barb fitting .
Patented, anti-spill protection.
Designed for high flow applications with pressure
relief and safety-venting
Part
Number
Pipe
Thread
Hex
Size
Thermal
Relief
Pressure
Relief
Overflow
Hose
Diameter Diesel/Gas Outward Flow Rate
2989-11 1/2-14 PTF 1.063" Yes 4-8 PSIG 5/16" ID Diesel 70 SCFH @ 18" water pressure
Specifications
Our policy is one of continued research and development. We therefore reserve the right to amend,
without notice, the specifications given in this document.
© Norgren GT Development Corporaton, 2014
High-Flow Fuel Tank Vent
2989-11
Rev. 8/14 01