Norgren 2989-11 User Manual
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
Performance
Application
Limitations
Air Venting
Unseating
Anti-Spill
Thermal Relief
Pressure Relief
Barb Alignment
Material
Weight
The 2989-11 high-flow vent is intended to provide tank breathing, prevent fuel spillage, relieve excess
pressure, and provide ther mal 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
pressuriz ation by returning vapor.
This tank vent valve is designed for use on diesel fuel aluminum tanks up to 200 gallon total capacit y
and diesel fuel steel tanks up to 132 gallon capacity.
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).
Once closed and upright, in the absence of fuel , vent will par tially unseat (re-open) at a descending
pressure at or above 40 inches H2O.
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.
At 255°F, vent will thermally activate and open a 0.56 Diameter hole to atmosphere when exposed to
an enveloping fl ame in accordance with FHWA Title 49, CFR Par t 393 Section 67 (d)(1) that causes a fuel
temperature to rise at a rate of at least 6° F per minute.
Pressure relief feature will start to flow with diesel applied to between 4 and 8 P SIG, and will flow 1.0
GPM or more of diesel with 10 PSIG.
Barb may be aligned after installation by rotating without disturbing thread alignment.
Zamak 3
64. 4 grams (approximate)
High-Flow Fuel Tank Vent
2989-11
Specifications
Part
Number
2989-11 1/2-14 PTF 1.06 3" Yes 4-8 PSIG 5/16" ID Diesel 70 SCFH @ 18" water pressure
Rev. 8/14 01
Pipe
Thread
Hex
Size
Our policy is one of continued research and development. We therefore reserve the right to amend,
Thermal
Relief
Pressure
Relief
without notice, the specifications given in this document.
© Norgren GT Development Corporaton, 2014
Overflow
Hose
Diameter
Diesel/Gas
Outward Flow Rate
High-Flow Fuel Tank Vent 2989-11
Dimensions (Inches)
Ø 15/16
1.063 HEX
1-17/32
BARB FITTING FOR
5/16 I.D. HOSE
0.31 DIA. SHANK
0.36 DIA. BARB
1/2-14
NPTF
27/32
3-5/32
Warning
Improper selection, misuse, age or malfunction of components used in
commercial vehicle systems can cause failure in various modes. The system
designer is warned to consider the failure modes of all component par ts
used in commercial vehicle systems and to provide adequate safeguards to
prevent personal injury or damage to equipment or property in the event of
such failure modes. System designers and end users are cautioned to consult
instruction sheets and specifications available from the factory. The system
designer/end user is responsible for verifying that all requirements for the
application are met.
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
Warranty
The products described herein are warranted subject to seller’s Standard
Terms and Condition of Sale, available at seller’s website.
Rev. 8/1402
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