HomeMy WebLinkAbout1.35 LACT Unit description.pdfLease Automatic Custody Transfer (LACT) Unit
A LACT unit is a automatic custody transfer liquid measurement location that measures
condensate from a location through the unit for sales.
The basic components and function of a LACT unit include the charge pump and motor,
strainer /air eliminator (strains solids larger than the perforations in the removable basket
with liner), BS &W monitor and probe (monitors the flowing stream for basic sediment
and water), meter (measures the product stream and allows totalization either through a
local totalizer or electronic pulses to a flow computer), meter instrumentation, check
valves (prevents backflow to the meter in case the downstream block and bleed valve is
left open), block and bleed valves (main line divert valve separating the to and from lines
to the prover four -way divert valve), prover instrumentation, back pressure valve
(maintains pressure above the vapor pressure of the fluid being metered and provide a
constant pressure and flow on the meter during proving, LACT control panel and
calibrated bi- directional meter prover.