Gravity Meter

SAMPI SM Series rotary motion positive displacement (PD) meters offer the best in measurement accuracy for custody transfer of petroleum products, aviation fuels and some industrial liquids.
SAMPI meters present a unique design, almost nullifying the stream shear action, balancing pressures in the meter chamber, ensuring an insignificant pressure drop through the meter. SAMPI meter consists of a housing in which three synchronized rotors turn with no metal-to-metal contact neither between them nor with the housing internal surface, preventing the internal parts from wear, which results in a long lifetime.
The hydraulic sealing is accomplished by a stationary boundary layer of liquid, not by the wiping action of mechanical parts.

Main Features

  • High accuracy and repeatability.
  • Low pressure drop: the meter will work accurately both by gravity or under pump pressure.
  • Sustained accuracy: no wear from metal-to-metal contact inside the measuring chamber means almost no accuracy loss over time, fewer recalibrations, and longer lifetime. SM series meters comply with MID (European W&M standard) and other International Weight and Measures accuracy requirements.
  • Weights & Measures approval (world-wide) for custody transfer with mechanical or electronic registration systems meeting API standards.
  • Designed and approved for ATEX Zone 1 Standard.
  • Wide temperature range: products can be metered accurately from -25°C to +55°C).
  • Maximum adaptability: the right-angle design provides unequalled mounting flexibility to meet your installation requirements.
  • Rated to 150 PSI/10.5 bar for fuels and industrial liquids.

Material of Construction

  • Meter and rotors: Cast aluminium (or AISI 316 for class 8 M7 meter).
  • Internal components: aluminium, Ni-Resist, stainless steel, iron.
  • Seal materials: NBR, FKM, PTFE.

A SAMPI brand Gravity Metering Set called SM50G for retail truck application is also part of SM series meters. This is a system to be used uniquely with SAMPI TEX flow computer

Technical Specifications

Sizes: 1″ 1/2 up to 4″.
Flow Rates: 25 l/min up to 1700 l/min (7 GPM up to 449 GPM).
End Connections: ANSI Flanged, NPT, BSPT, Slip Weld.
Pressure Ratings:

  • Cast Case: 10 & 25 bar (150 & 350 PSI) non-shock working pressure.

Accuracy (Mechanical Registration):

  • Capable of ±0.22% over a 10:1 range.

Repeatability (Mechanical Registration):

  • 0.05% (±0.025%) of reading over entire range
SM5 1″1/2 or 2″ 250 l/min (66 GPM)
SM7 2″ or 1″1/2 500 l/min (132 GPM)
SM15 3″ or 2″ 1000 l/min (265 GPM)
SM30 4″ or 3″ 1700 l/min (450 GPM)
SM50 Gravity 4” 1300 l/min (343 GPM)

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