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VaPOrless 99 LD -2000 Addendum 5.0 Description of the 99 LD -2000 The 99 LD -2000 mechanical leak detector incorporates a poppet valve and metering the pump is activated, fuel is metered into the line to raise the pressure. If pm' When above 24 psi, the poppet valve opens and full flow into the lute occurs. If the pressure fails sure rises above 24 psi, fuel flow in the line is restricted to approximately 2 gaUmin. tO rise The 99 LD -2000 mechanical line leak detector is based on the original LD -2000 in 1990. Features of the 99 LD -2000 include: 2000 developed by • Drastically reduced piston size of the leak detector m , lY ung for a much more responsive significantly reducing the fuel needed to pass through the metering pin and peak detector, sioppet to allow full flow of the pump, , Eliminates traditional fuel flow path to the piston sIlowin system better isolation from the turbulence and hydraulic effects foundleak metering during pump startup. This fuel flow change also eliminates the mein chanic pump head effects present in the upper half of the um g al anthermal to line pressure changes. pump, �O� the leak detector to Onlyrespond • More responsive Ieak detectors all the line to open up for Pumpingm When the pump is off, itwillreset to leak sense position faster because of re quickly amount of fuel under the piston. Additionally, the leak detector does note smaller completely reset to cycle throughhave to as 5 psi (when the the leak sense position If the line pressure falls as low PUMP is off), the leak detector is forced into the leak sense mode. • Reduced surface area of the piston results in less exposure to h enhancing leak detection performance not onlyYdraulic line shock, flexible piping systems. in steel and fiberglass lines but also in Higher leak sense pressure is possible due to the reduced piston area The leak detector stays Y the fast fill position to a higher pressure, compressing vapor pockets or removing stretch from flexible pipe faster. • Field adjustment access in cap to adjust sensitivity for wear or field deep burial or excessive trapped vapor. variables such as .Integrated check valve to compensate forum valves in the turbine, defective submersible c component failure such as leaking check valves. If pump component failur system to depressurize occurs thaintegrated :heck valve doeressure reliefs, or defective bypass e and reset the leak detector. s not allow the Page 6