Ordering Guide
How to Order a Flo-Gage™ Flow Meter
Build your model number in seven steps — body size, series, material, flow direction, full-scale flow rate, options, and switches. Not sure where to start? Use the Product Selector or call us.
Seven-Step Ordering Sequence
Body Size
Pipe size at the meter inlet (e.g., ½″, ¾″, 1″, 2″, 4″, 8″).
Series
Series 7 = Threaded (FNPT standard). Series 8 = Wafer (mounts between 150 or 300 lb class flanges).
Body Material
Code 1 = Bronze · Code 2 = Monel · Code 3 = 316 Stainless Steel.
Flow Direction
L, R, VUL, VUR, VDL, or VDR — see the direction guide below.
Full Scale Flow Rate
Full scale GPM for liquid meters; full scale SCFM for gas meters. Prefix with "M" for metric units. Use Option E for non-standard flow rates.
Options
Add option codes for seals, case style, service type, transmitters, and more (see the full options table below).
Switches
Add reed switch codes (1S2 or 2S2) if high/low flow alarm contacts are needed.
Ordering Example
b) Series — Threaded vs. Wafer
Series 7000 — Threaded
- FNPT connections standard
- Sizes ¼″ to 3″
- FBSP threads available on request
Series 8000 — Wafer
- Mounts between 150 or 300 lb class flanges
- Sizes ½″ to 8″
- No flange drilling required
c) Body Materials
| Code | Material | Typical Use |
|---|---|---|
| 1 | Bronze | Most common; suitable for water, oils, and most liquids |
| 2 | Monel | Corrosion-resistant; for seawater and aggressive media |
| 3 | 316 Stainless Steel | Chemical resistance; food-grade and high-purity applications |
Standard bellows: Bronze. Optional: Monel, 316 SS, or Inconel. Standard seals: Buna-N. Optional: Viton (A), EPR (B), Teflon (B2).
d) Flow Direction Codes
e) Full Scale Flow Rate
Specify the full-scale flow rate in GPM (liquid) or SCFM (gas). Prefix with "M" for metric units (l/min or Nm³/h). For best accuracy, select a range that places normal operation in the upper half of the scale. Use Option E for non-standard flow rates; Option ES for low-flow ranges below 2 GPM.
Standard Liquid Flow Ranges
| Pipe Size | Standard Full-Scale Ranges |
|---|---|
| ½″ | 2 GPM · 3 GPM · 4 GPM · 6 GPM · 10 GPM |
| ¾″ | 6 GPM · 10 GPM · 15 GPM · 20 GPM |
| 1″ | 15 GPM · 20 GPM · 30 GPM · 40 GPM |
| 2″ | 40 GPM · 60 GPM · 100 GPM · 150 GPM · 200 GPM |
| 8″ | Up to 3,000 GPM |
Low-Flow Option (ES)
Ranges below 2 GPM available — e.g., 4 GPH, 6 GPH, 10 GPH, 15 GPH.
Gas Flow Ranges
40 SCFH (½″) up to 20,000 SCFM (8″). Requires Option I for compressed gas service.
f) Table of Options
| Code | Description |
|---|---|
| A | Viton Seals |
| B | EPR Seals |
| B2 | Teflon Seals |
| C | Calibrated for Specific Gravity |
| D | Gasketed Case |
| D2 | Gasketed Case with Condulet |
| E | Non-Standard Flow Rate |
| ES | Low Flow Rate (Below 2 GPM) |
| F | Aluminum Housing with Plastic Dial Crystal |
| F2 | Aluminum Housing with Glass Dial Crystal |
| G | Custom Scales and Dials |
| H | High Pressure Service (400 psig max.) |
| I | Compressed Gas Service |
| J | Peak Flow Indicator |
| K | Saturated Steam Service (120 psig max.) |
| N | Ammonia Service |
| P | Panel Mount |
| R2 | Remote Readout, Brass |
| R3 | Remote Readout, 316 SS |
| T | Expanded Temperature Range |
| V | High Viscosity Service (5–500 cps) |
| W | 4–20 mA DC 4-Wire Transmitter |
| W2 | 4–20 mA DC 2-Wire Transmitter |
| W3 | 4–20 mA DC 2-Wire Output Only |
| RW3 | Digital Display Readout |
| X | Hi / Lo Alarm Relays |
| Y | 0–1000 Hz Frequency Transmitter |
| Z | Combination of W, X & Y |
Multiple options can be combined — append codes in sequence (e.g., AD = Viton seals + Gasketed case).
g) Reed Switch Options
| Code | Description |
|---|---|
| 1S2 | Single Pole Double Throw Reed Switch |
| 2S2 | Two Single Pole Double Throw Reed Switches |
Reed switches are adjustable from 30–90% of full scale. See the Limit Switches page for full specs.
Approval Suffixes
| Suffix | Description |
|---|---|
| -EM | Electromagnetic Compatibility 89/336/EEC |
| -IS | Intrinsically Safe 94/9/EC |
Services Not Recommended
The Flo-Gage™ is not suitable for the following services:
- Resins, paints, or monomers
- Super-solvents or sulfuric acid
- Foams with inconsistent densities
- Toxic substances requiring hermetic sealing
- Fluids above 500 centipoise viscosity
- Piston pump systems with pulsating flow
- Gravity-fed systems with insufficient head
Contact the factory if you are unsure whether your application is suitable.
Ready to Place Your Order?
Fill out the quote request form with your model number and application details, or call our engineering team directly. We'll confirm your configuration and provide pricing and lead time.
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