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Mechanical Leak Detectors

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Mechanical Leak Detectors

FE PETRO® brand MLD+ mechanical leak detectors provide precise leak detection for standard fuel and biofuel applications on 4" submersible turbine pumps. All models are capable of detecting line leaks equivalent to 3 gph at 10 psi (11.4 lph @ 0.70 bar).

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PRECISION LEAK DETECTION

The MLD+ features a compact, yet rugged design to reduce installation height and provide accurate, hassle-free operation.

Standard Fuel Types

Two models to meet the needs of your standard fuel applications include the MLD+G (blue cover, copper vent tubing) for gasoline with up to 10% Ethanol and the MLD+D (gold cover, copper vent tubing) for diesel with up to 5% biodiesel.

Biofuel Types

Two models to meet the needs of your biofuel applications include the MLD+AG (blue cover, stainless vent tubing) for gasoline with up to 85% Ethanol and the MLD+BD (gold cover, stainless vent tubing) for diesel with up to 20% biodiesel or 100% biodiesel.

Precision Leak Detection

A specialized metering pin unique to only the MLD+ provides precision leak detection for any type of pipework system including flexible, rigid or a combination of the two.

More Features

  • Piston style construction with reduced volume allows the MLD+ to react quickly and provide more accurate leak detection capabilities.

  • Burnished piston chamber provides smooth operation and long service life.

  • Color coded covers easily identify the model to the application (gold for diesel and blue for gas).

  • Opens completely to allow maximum product flow during fueling operation and remains open with discharge pressure as low as 1 PSI (0.07 bar).

  • Compatible with FE Petro™ brand STPs, as well as competitive STPs and line leak detector housings.

 

 

General

  • All models are capable of detecting line leaks equivalent to 3 gph at 10 psi (11.4 lph @ 0.70 bar) when installed properly with the appropriate fuels - all models will signal detection of leaks by restricting product delivery to less than 3 gpm (11.4 lpm) and taking more than 4 seconds to open
  • All models will remain in the open position during product delivery to manifold, with discharge pressures as low as 1 psi (0.07 bar) - all models will reset to "tripped" when line pressure delay is below 3 psi (0.21 bar) with pump off
  • Detects leaks up to 10 feet (3 meters) above the point of installation
  • Max. liquid viscosity of 70 SSU at 60 °F (15 °C)
  • Gasoline models (blue cover, MLD+G and MLD+AG) are also listed for fuel mixtures containing 20% MTBE, 20% ETBE or 17% TAME with gasoline as well as diesel fuels, fuel oils, kerosene, Avgas and jet fuels.
  • Diesel models (gold cover, MLD+D and MLD+BD) are also listed for kerosene applications

Approvals/Certifications

  • cULus listed.
  • Third party certified to comply with US EPA requirements 280.41 (B) and 280.44 (A) for continuous monitoring of pressurized piping.
  • Consult factory for other applicable approvals.

Standard Fuel MLD+ Mechanical Leak Detectors

Model Number Description
403168901 STP-MLD+G for gas, single pack (blue cover, copper vent tube, brass fittings)
403168903 STP-MLD+G for gas, three pack
403170901 STP-MLD+D for diesel, single pack (gold cover, copper vent tube, brass fittings)
403170903 STP-MLD+D for diesel, three pack
403172903 STP-MLD+D combo, three pack (contains two STP-MLD+G and one STP-MLD+D

Biofuel MLD+ Mechanical Leak Detectors

Model Number Description
403169901 STP-MLD+AG for alcohol-gas, single pack (blue cover, stainless steel tube and fittings)
403169903 STP-MLD+AG for alcohol-gas, three pack
403171901 STP-MLD+BD for biodiesel, single pack (gold cover, stainless steel tube and fittings)
403171903 STP-MLD+BD for biodiesel, three pack
  • MLD+G are listed for compatibility with fuel mixtures containing up to 10% ethanol with gasoline, up to 5% biodiesel with diesel fuels, and 20% MTBE, 20% ETBE, or 17% TAME with gasoline.
  • MLD+D models are listed for compatibility with diesel fuels with up to 5% biodiesel and kerosene applications only.
  • MLD+AG models are listed for fuel mixtures containing up to 85% ethanol with gasoline and 20% MTBE, 20% ETBE, or 17% TAME with gasoline as well as diesel fuels, fuel oils, kerosene, Avgas and jet fuels.
  • MLD+BD models are listed for diesel with up to 20% biodiesel or 100% biodiesel and kerosene applications only.
  • All above models will only mount in the 2" NPT leak detector port of a 4" submersible turbine, including competitive models, or in a leak detector adapter tee (sold separately below).
  • MLD+ models are listed for use with rigid pipelines up to 165.1 gallon capacity, with flexible pipelines up to 109.8 gallon capacity, and with combination rigid/flexible pipelines up to 274.9 gallon capacity.

MLD+ Mechanical Leak Detector Repair Parts & Accessories

Model Number Description
400440101 Vent tube (for use with MLD+G and MLD+D)
400449903 Hardware pack (fittings and documentation for MLD+G and MLD+D)
400449904 Hardware pack (fittings and documentation for MLD+AG and MLD+BD)
400518001 Leak detector Adapter tee
403123001 Vent tube, stainless steel (for use with MLD+AG and MLD+BD)