Prime 4 Positive Displacement Meter

Manufacturing: Guidant Measurement, Smith Meter® brand

The PRIME 4 model Positive Displacement (PD) meter, made of carbon steel and available in a single 4" size, is a single-case rotary vane meter. Designed to meet the accuracy and reliability requirements of the custody transfer market, it features a design that undisturbs product flow during measurement, avoiding wasted energy due to unnecessary hydraulic bending of the liquid.

How it works

The PRIME 4 meter is a rotary positive displacement meter that measures product flow and features an integrated electronic output. The meter body, machined with high precision, contains a rotor rotating on tungsten carbide bearings and two evenly spaced polyketone vanes.

As the fluid passes through the meter, the rotor and vanes rotate around a fixed eccentric, causing the vanes to move alternately (reciprocal motion). This successive movement forms precisely sized "measurement chambers" between the two vanes, the rotor, the body, the bottom cover, and the top cover. A continuous series of these measurement chambers are generated as the rotor rotates. Neither the vanes nor the rotor come into contact with the stationary walls of the "measurement chamber."

applications

• Custody transfer at loading terminals or pipelines
• Measurement of liquid fuels and biofuels, such as: jet fuel, gasoline, diesel oil, biodiesel and ethanol
• Mixing systems
• Bidirectional flow lines in industrial facilities
• Operations in classified areas with metrological reliability requirements

Technical specifications

• Type: Rotary Positive Displacement Meter 
• Bidirectional flow: measures product flow in two directions 
• Process temperature range: -20°C to +93°C 
• Ambient temperature range: -50°C to +70°C 
• Reed material: Polyketone 
• Bearings: tungsten carbide
• Precision:
  • Repeatability of +/- 0.02%
  • Linearity of +/- 0.15% in the normal flow range 
  • Linearity of +/- 0.25% in the extended flow range

Advantages of the PRIME 4 Meter

• High reliability: even in clean or poorly lubricated liquids
• Accuracy in both flow directions: ideal for reversible systems
• Extreme durability: robust design with low maintenance requirements
• Safe installation: available with certification for explosive atmospheres
• Optimized design: continuous measurement without hydraulic flow restrictions

Certifications and compliance

• Classified area approvals: INMETRO / UL Brazil, ATEX and IECEx
• Metrological certifications: Inmetro/Dimel Ordinance No. 154 From March 18, 2024, NTEP (US) CoC #96-099, Measurement Canada (Canada) NOA AV-2323, OIML R117 issued by NMi (Netherlands) and MID issued by PTB are available for the EU
• Compliance with international standards: follows IEC 60079-0 7th Edition, EN 60079-0:2018; IEC 60079-1 7th Edition, EN 60079-1:2014; IEC 60079-11 6th Edition, EN 60079-11:2012 standards
• Ingress Protection (IP): IP66 marked for UL Brazil installations and IP66 for ATEX, IECEx and UKEx installations and IP65

Contact

For more information about the PD PRIME 4 Meter and other custody transfer liquid measurement solutions, please contact terminais@staging.fluxo.si.