Verification and/or checking the accuracy of liquid meters can be done with a device
known as a liquid displacement meter prover. Meter provers can be stationary or mobile.
They can be bi-directional, uni-directional, piston type and small volume type. They are
designed in accordance to the space available and the product to be proved, however, they
must all be sized to accommodate the flow rates of the meters to be proved.
EN-FAB, Inc. has designed, engineered, manufactured and tested the various types of
meter provers noted above. All EN-FAB, Inc provers have their volumes certificates by a
third party and the calibration certificates are furnished to the client.
EN-FAB provers are in accordance with, and will meet the standards set forth by the
American Petroleum Institute (API) and the International Organization for Standardization