FMD045 SMALL VOLUME METER PROVER
Flow MD is the leader in small volume meter prover technology. With an innovative and patented design, the Flow MD line of provers provides superior performance, design, and functionality. The FMD-045 Small Volume Prover provides exceptional performance, quality, and field durability. The FMD-045 is an exceptional choice for all your proving applications, no matter how complex. Learn more about the FMD-045 small volume prover below.
| Max Flow Rate* |
| BPH |
M3H |
GPM |
| 6,400 |
1,022 |
4,500 |
*FMD wants to ensure that you get the proper Prover for your application. Our Provers are compatible with most meter types, including Coriolis, Turbine, Helical Turbine, Positive Displacement, and Ultrasonic. Meter type, operating conditions, and fluid characteristics will affect prover sizing.
Please reach out to us to discuss your specific application and the optimal FMD Prover for your application. |
| Turndown |
| 1200:1 |
Turndown is typical of normal operations. Turndown ratio can vary significantly depending on installation and process conditions. Actual turndown may be much greater than 1200:1 in some conditions such as water draw, or much less in high pressure, dry product applications such as NGL service. |
| Pressure Drop |
| 5 psi at max flow rate of each prover (calculated with water) |
| Performance |
| Performance |
Exceeds 0.005% ISO17025 Calibration Lab |
| Repeatability |
< 0.02% – Exceeds API Standard |
| Uncertainty |
Typically 0.004% (Water draw) |
ADDITIONAL SPECIFICATIONS
| Displaced Volume – FMD-045 |
| Gallons |
Liters* |
| Primary |
Secondary |
Primary |
Secondary |
| 35 |
25 |
130 |
100 |
| *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. |

| FMD-045 Small Volume Prover Dimensions (inches) |
| Pressure Rating |
A |
B |
C |
D |
E |
F |
G |
H |
J |
K |
L |
M |
N |
P |
Q |
R |
S |
T |
U |
|
|
|
|
|
|
|
|
Min |
Max |
|
|
|
|
|
|
|
|
|
|
|
| 150# |
53.12 |
58.21 |
195.50 |
51.50 |
84.25 |
35 |
120 |
32 |
79 |
30 |
95 |
30 |
1 |
34.38 |
54.25 |
24.50 |
34.69 |
14 |
90.57 |
15.88 |
| 300# |
53.12 |
58.21 |
195.50 |
51.50 |
84.25 |
35 |
120 |
32 |
79 |
30 |
95 |
30 |
1 |
34.38 |
54.25 |
24.50 |
34.69 |
14 |
90.57 |
16.25 |
| 600# |
53.12 |
58.21 |
195.50 |
51.50 |
84.25 |
35 |
120 |
32 |
79 |
30 |
95 |
30 |
1 |
34.38 |
54.25 |
24.50 |
34.69 |
14 |
90.57 |
17.50 |
| 900# |
55.36 |
58.21 |
195.50 |
51.50 |
84.25 |
35 |
120 |
32 |
89 |
30 |
93 |
31 |
1 |
35 |
53.38 |
23.25 |
34.69 |
14 |
90.57 |
19.13 |
Drawings Notes:
All dimensions are shown in inches. 1. Dimensions “K” and “L” are for center of gravity within 6 inches. 2.Spacial dimensions have a tolerance of 1.00 inches. 3. Dimension “P” is inlet-to-outlet flange distance,
drains and vents may vary. 4. All FMD-130 600# and FMD-200 models have 8 lifting lugs. Table gives dimensions to outermost lugs. 5. All dimensions are subject to change without notice. 6. For TT configurations see specific
outline. 7. Dimension “H” max is the distance required to remove fully assembled piston assembly from the prover. Complete seal change may be done with piston not completely removed which requires 32”. |
| FMD-045 Weights |
ANSI Pressure – 150# |
ANSI Pressure – 300# |
ANSI Pressure – 600# |
ANSI Pressure – 900# |
| Weight +/- 5% |
LBS |
KGS |
LBS |
KGS |
LBS |
KGS |
LBS |
KGS |
| 7,130 |
3,240 |
7,230 |
3,285 |
7,330 |
3,330 |
8,750 |
3,970 |
| Weight with Crate +/- 5% |
8,055 |
3,650 |
8,155 |
3,700 |
8,255 |
3,750 |
9,675 |
4,390 |
| Weight filled with Water +/- 5% |
7,925 |
3,595 |
8,025 |
3,640 |
8,125 |
3,690 |
9,545 |
4,330 |
| FMD-045 Motor Voltage – Phase Availability – Amperage Draw |
| Motor HP |
120 VAC |
220 VAC |
208-240 VAC |
380-400 VAC |
440-480 VAC |
| Single Phase |
Single Phase |
3 Phase |
3 Phase |
3 Phase |
| 50-60 Hz |
50-60 Hz |
50-60 Hz |
50-60 Hz |
50-60 Hz |
| 2.0 |
22 |
11.6 |
8.6 |
5.2 |
2.9 |
FMD-045 Approvals and Certifications
| ISO |
9001:2015, 17025:2017 |
| CE |
Mach Dir:2006/42/EC, EN 12100-2:2003 |
| ATEX |
2014/34/EU II 2(1)G Ex db mb [ia Ga] IIB T3 Gb /-20 °C to +40 °C / Cert#: CSANe 25ATEX1007X |
| CSA (US & Canada) |
Class I, Division 1, Groups C and D, Class I Division 2, Groups C and D – Maximum Operation Ambient 60°C – Class I, Division 1, Group D, Class I, Division 2, Group D – Maximum Operation Ambient 40°C – Cert#: 2137671 |
| IECEx |
Ex db mb [ia Ga] IIB T3 Gb /-20 °C to +40 °C / Cert#: IECEx CSA 25.0009X |
| ABSA |
CRN: OF1072.2 |
Flow MD provides a complete line of meter provers for all your application needs. The FMD-045 Small Volume Prover provides exceptional performance, quality, field durability, and is a great choice for any meter proving application.
Flow MD Small Voume provers are compatible with all flow meter types including Coriolis, Turbine, Helical Turbine, Positive Displacement (PD) and Ultrasonic meter.
- Designed for a wide range of liquid measurement applications (see our Applications Specific Prover Page or our Frequently Asked Questions for additional application information)
- All FMD Provers conform to API MPMS Chapter 4 Standards
- Materials of Construction: Stainless Steel – 304 or 316, Duplex Steel
- Hardened Chrome finish on flow tube measurement section
- Standard flange size: 6″ ANSI B16.5
- 2″ drain flanges, 2″ thermowell vents
FMD045 SMALL VOLUME PROVER IMAGES