FMD007 Small Volume Prover

Small Volume Unidirectional Captive Displacement Prover


FMD007 Small Volume Prover

Flow Management Devices’ line of Unidirectional Captive Displacement Small Volume Provers provide exceptional accuracy and rangeability. The FMD-007 comes with standard 3” ANSI B16.5 flanges on both the inlet and outlet and a flow range capability of up to 700 GPM (1,000 BPH, 150 M3/HR). With a 1200:1 turndown, the FMD-007 is an exceptional choice for your application.

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*Max Flow Rate GPM BPH M3H
700 1,000 150
Displaced Volume Gallons **Liters
Primary Secondary Primary Secondary
5 4 19 15
Turndown Std Flange Size Standard Materials of Construction
1200:1 3” ANSI – 150#, 300#, 600# or 900# 304, 316 - Duplex Stainless Flanges


  • Accuracy: < 0.02% - Exceeds API Standard
  • Performance: Exceeds 0.02% ISO17025 Calibration Lab
  • Uncertainty: Typically 0.021% (Water draw)
  • Pressure Drop: 5 psi at max flow rate of each prover (calculated with water)


  • Conforms to API 4.2 and API 4.6
  • Galvanized frame per ASTM A123/123M-02
  • Shock mounted isolation pads for independent drive and support
  • 3-point installation for secure mounting on uneven surfaces
  • 1” connection flanges for rapid draining
  • 1” vents with check thermowell and pressure verification ports
  • All wetted parts stainless/PTFE
  • Prover Interface Module (PIM) with advanced features
  • Smooth Belt Drive with clutch
  • Shock mounted Isolation Pads

Flow Management Devices’ goal is 100% customer satisfaction: therefore, we provide the following at no charge.

  • Final Acceptance Testing Includes: Water Draw, Hydrostatic & Dielectric Test
  • Training in our facility during Final Acceptance Testing
  • Free crating per ISPM-15 (Stationary only)
  • One day onsite startup and training


  • ISO 9001/2008
  • ISO 17025
  • CSA/US Class 1 Div. 1
  • CRN
  • ATEX
  • GOST (Russia)
  • Kazakhstan Metrology

* When sizing a flow meter for this prover, the maximum flow rate should be less than or equal to the maximum rate of the prover. All the FMD Small Volume Provers can operate at the maximum flow rates as specified. Nominal flow rates should not exceed 80% of maximum. All application information should be verified with FMD and will vary due to the meter technology used in each application.

**Please Note: Standard prover volume is in gallons, liters are optional. Prover requires non-standard switchbar for liters. Alternate displaced volumes are available for liters, please contact factory for additional information. Liters are a direct conversion and not indicative of Seraphin can sizes.