Defender Series®

Overfill Prevention Valve

Defender Series®

Overfill Prevention Valve

The Defender Series® overfill prevention valve (OPV) prevents the overfill of an underground storage tank during a gravity-fed product delivery. It employs a revolutionary magnetically-coupled actuator system to provide positive shutoff. This unique method of shutoff eliminates any penetrations in the valve, making it both vapor and leak tight. 

Defender Series OPV Tester Highlight.psd

NEXT-LEVEL OVERFILL PREVENTION

The Defender Series® OPV provides safe, rapid, and reliable fuel drops with simple installation, service, and remote testing capability. The secret to this game changer is its revolutionary magnetically-coupled actuator system. The design allows positive shutoff without a single penetration in the valve body, meaning no leak or vapor paths.


Easy UST Regulation Compliance

Unlike other OPVs, the Defender Series does not have to be pulled out of the UST to conduct the mandatory 95% tank volume shutoff confirmation test every three years. That’s hassle-free compliance with no risk of damaging your equipment or extended shutdowns.

Remote Testing

The magnetically-coupled actuator system along with a testing tool allows for primary functionality testing of the OPV at grade level without having to remove the entire assembly from the riser.

Simple Installation

There’s no flaring, riveting, or messy epoxying of drop tubes on site. The Defender Series. OPV utilizes an error proof roll crimp-and-thread installation method to achieve a fast and easy in-line installation.

TECHNICAL ADVANTAGES

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Remote Testing

Test the OPV at grade level without having to remove the entire assembly from the riser.

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Fuel Compatibility

Each model is designed to meet all major fuel types, approvals, and global performance requirements.

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High or Low Flow Drops

Minimal flow path obstructions accommodate high flow fuel drops while also accommodating low flow fuel drops.

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No Vapor or Leak Paths

The OPV design allows positive shutoff without a single penetration in the valve body, meaning no leak or vapor paths.

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Regulation Compliance

The OPV does not have to be pulled out of the UST to conduct the mandatory 95% tank volume shutoff confirmation test.

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Simple Installation

There’s no flaring, riveting, or messy epoxying of drop tubes on site.

Defender Series OPV - Versitile - Wide.psd
REMOTE TESTING IN MINUTES

Fast visual inspection can be conducted by a single person in a matter of minutes. The magnetically-coupled actuator system along with the testing tool allows for primary functionality testing of the OPV without having to remove the entire assembly from the riser.

Defender Series OPV - Remote Testing - OPV.psd

Remote Testing Tool

The remote testing tool will actuate the flapper when inserted down the drop tube and slid by the actuator - this is confirmed visually through a window in the tool.

Defender Series OPV - Remote Testing - Tester.psd

Any Tank Size

To accommodate varying tank sizes, the testing tool handle is segmented into six sections for customization up to 11 feet (3.35 meters) in length.

SIMPLIFIED INSTALLATION

Gone are the days flaring, riveting, and epoxying drop tubes on site. The Defender Series® OPV utilizes an error proof roll-crimp and thread installation method to achieve a perfectly in-line installation.

Defender Series OPV - Install - Adapter.psd

Top Adapter

A special, double O-ring top adapter is used to attach the drop tube for easy installation without any drilling, riveting, epoxy or flaring tools.

Defender Series OPV - Install - In-Line.psd

In-Line Assembly

A perfectly in-line assembly installs smoothly into the riser and can be easily removed for maintenance.

Defender Series OPV - Install - Threaded.psd

Threaded Connections

With threaded top and bottom drop tube installation, damaged drop tubes can easily be replaced without having to purchase an entirely new assembly.

COMPLETELY VERSATILE

The Defender Series® represents our most versatile offering of OPVs to date with more approvals and capabilities per model as well as simpler ordering options.

Approvals

Each model is designed to meet all major approvals and global performance requirements.

Fuel Compatibility

Alcohol, gas, and biofuel (E-85, gasoline and biodiesel) compatible models come with hard coated anodized drop tubes for full compatibility.

Drop Applications

For use in direct and remote gravity drop applications with models for coaxial applications.

Defender Series OPV - Flow - Wide.psd
HIGH OR LOW FLOW

Minimal flow path obstructions accommodate high flow drops while the magnetically-coupled actuator system also provides reliable positive shutoff for low flow drops.

Flow Rates

The Defender Series® OPV accommodates a broad range of flow rates from 25 gpm to 370 gpm (95 lpm to 1,400 lpm).

High Flow

In high flow applications, the actuator system will hold the flapper in place, only releasing it into the flow of fuel once the float has risen to generate positive shutoff.

Low Flow

In low flow applications, the actuator system will assist by kicking the flapper out into the flow of fuel to generate positive shutoff.

Components

  1. Pre-flanged aluminum top drop tube
  2. 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
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Dimensions

defender_opv_dims.psd

Operation

The OPV is designed with a primary shutoff that will activate between 85% and 92% of tank volume, depending on tank diameter. After the primary shutoff is actuated the flow through the valve is limited to less than 30 lpm 8 gpm (30 lpm). A secondary positive shutoff will occur at 95% tank volume if filling continues. 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.

Approvals/Certifications

  • UL 2583 and ULc listed, MH21090
  • ATEX approved
  • CARB certified, VR-101 (FFS) and VR-102 (OPW®) listed

Defender Series® Overfill Prevention Valve UL

Model Number Description
708591901

Defender Series™ overfill prevention valve with 5' (1524mm) top drop tube, 8' (2438mm) bottom drop tube

708591902

Defender Series™ overfill prevention valve with 5' (1524mm) top drop tube, 10' (3048mm) bottom drop tube

708591921

Defender Series™ overfill prevention valve with 5' (1524mm) top drop tube, 8' (2438mm) bottom drop tube, AGB compatible*

708591922

Defender Series™ overfill prevention valve with 5' (1524mm) top drop tube, 10' (3048mm) bottom drop tube, AGB compatible

708592901

Defender Series™ overfill prevention valve with 10' (3048mm) top drop tube, 8' (2438mm) bottom drop tube

708592902

Defender Series™ overfill prevention valve with 10' (3048mm) top drop tube, 10' (3048mm) bottom drop tube

708592921 Defender Series™ overfill prevention valve with 10' (3048mm) top drop tube, 8' (2438mm) bottom drop tube, AGB compatible
708592922

Defender Series™ overfill prevention valve with 10' (3048mm) top drop tube, 10' (3048mm) bottom drop tube, AGB compatible

708593901

Defender Series™ overfill prevention valve, coaxial with 6.5' (1981mm) top drop tube, 8' (2438mm) bottom drop tube

708593902

Defender Series™ overfill prevention valve, coaxial with 6.5' (1981mm) top drop tube, 10' (3048mm) bottom drop tube

708593923 Defender Series® overfill prevention valve, poppeted coaxial with 6.5' top drop tube, 8' bottom drop tube, AGB compatible*
708593924

Defender Series™ overfill prevention valve, poppeted coaxial with 6.5' (1981mm) top drop tube, 10' (3048mm) bottom drop tube

708594901

Defender Series™ overfill prevention valve only with top adapter, AGB compatible

708594902

Defender Series™ overfill prevention valve only with coaxial top adapter, AGB compatible

708535901

Roll crimping tool

708530930

Replacement roll crimper tool roller bit for retrofit with existing tool

708534901

Remote testing tool, 11' (3353mm) long sectional/collapsible

708534902

Coaxial Defender OPV Remote Testing Tool

  • Alcohol, gas, biofuel compatible (E-85, gasoline and biodiesel) models come with hard coated anodized drop tubes for full compatibility.

Defender Series® Overfill Prevention Valve EN

Model Number Description
708691901

Defender Series® overfill prevention valve with 5' (1524mm) top drop tube, 8' (2438mm) bottom drop tube, KIWA certified

708691902 Defender Series® overfill prevention valve with 5' (1524 mm) top drop tube, 10' (3048 mm) bottom drop tube, KIWA certified
708692901 Defender Series® overfill prevention valve with 10' (3048 mm) top drop tube, 8' (2438 mm) bottom drop tube, KIWA certified
708692902

Defender Series® overfill prevention valve with 10' (3048mm) top drop tube, 10' (3048mm) bottom drop tube, KIWA certified

708694901

Defender Series® overfill prevention valve only with top and bottom adapter, AGB compatible, KIWA certified

708556901 Defender Series® remote fill splice kit, includes splice and O-rings
708535901

Roll crimping tool

708530930

Replacement roll crimper tool roller bit for retrofit with existing tool

708534901

Remote testing tool, 11' (3353mm) long sectional/collapsible

  • Alcohol, gas, biofuel compatible (E-85, gasoline and biodiesel) models come with hard coated anodized drop tubes for full compatibility.

Drawings

Title Type Size
CD_SSH_708591902_001.stp STP 24.24 MB
CD_SSH_7085909XX_001.pdf PDF 0.03 MB
CD_SSH_7085909XX_001.dwg DWG 0.4 MB
CD_SSH_9466G_001.dwg DWG 0.3 MB
CD_SSH_9466G_001.pdf PDF 0.1 MB

Manuals

Title Type Size
708548001 OPV Shell Repair Guide.pdf PDF 1.03 MB
TB0318-03 OPV Drop Tube Calculation E-Form.pdf PDF 1.83 MB
TB0617-01 Defender Series OPV Inspection.pdf PDF 3.43 MB
TB0819-02 Defender Series® Overfill Prevention Valve Drop Tube Installation for Australia.pdf PDF 1.45 MB
TB0919-01 Defender Series® Overfill Prevention Valve Drop Tube Installation for Malaysia.pdf PDF 1.47 MB
TB0221-05 Defender Series Remote Fill OPV Inspection.pdf PDF 1.64 MB
F-9044 Defender Series OPV Installation Guide.pdf PDF 6.27 MB
F-9044SP Defender Series OPV Installation Guide.pdf PDF 4.12 MB
F-9044-ENKIWA Defender Series Overfill Prevention Valve.pdf PDF 4.17 MB
F-9044FR-ENKIWA Defender Series OPV Installation Guide.pdf PDF 4.01 MB
F-9044NL-ENKIWA Defender Series OPV Installation Guide.pdf PDF 4.1 MB
F-9044RU-ENKIWA r1 Defender Series OPV Installation Guide.pdf PDF 4.15 MB