The Smith Meter Unidirectional Prover is a sphere-type displacement prover for calibrating PD and turbine meters on pipelines, loading racks and marine systems. The sphere is launched by a transfer valve that has only two moving parts (the main valve and the transfer hemisphere), travels in one direction through the calibrated section between two detector switches, and returns to the receiving chamber ready for the next run. A self-contained, closed-loop hydraulic system drives the valve and a control panel permits remote operation.
Key specifications
Connections: 12 through 30 in, ANSI Class 150 through 600 flanged
Max working pressure: To 1,480 psi (10,204 kPa) at 100 °F
Temperature: -20 to 200 °F standard; others on request
Calibrated volume: Water-draw calibrated, traceable to NIST; certified within 0.02%
Standard equipment: Transfer valve, closed-loop hydraulic system, proving control panel with remote provisions, two detector switches, elastomeric sphere, gauges, thermometers, vent, thermal relief valve, drains
Compliance: ANSI B31.4 and B31.3 piping; API MPMS Chapters 4, 5 and 12; explosion-proof (NEMA 7/9) electrical for Class I Group D areas
Products: LPG, gasolines, crude oils and other liquid petroleum
How to specify / order
Smith provers are engineered to order; the bulletin gives specifications and standard equipment rather than a position-by-position model code. Provide the following with your RFQ:
Line size and flange class: 12-30 in; ANSI 150, 300 or 600
Meter(s) to be proved: Type, size and K-factor
Flow range: Minimum / normal / maximum flow
Product: Name, gravity, viscosity, temperature and pressure range
Controls: Local panel and remote control interface
Certification: Water-draw calibration; pressure code
Pricing and lead time are quoted per configuration. Send the model code (or your application details), product, flow range, and pressure/temperature to Flow Measurement Services for a quote. Specifications summarized from Smith Meter bulletin SS0V003; confirm current data with the factory before ordering.
Smith Meter (formerly FMC Technologies / TechnipFMC Measurement Solutions), now manufactured by Guidant. Flow Measurement Services supplies and services Smith Meter equipment.