Honeywell Elster AL425 Gas Flowmeter 25psi Natural Gas Diaphragm Meter
Brand: Honeywell
Model: AL425HOT
Connection size: 1 inch (20 LT), 1.25 inch (30 LT), 1.5 inch (45 LT)
Flow capacity: 425 SCFH (12.0 m ³/h)
Allowable working pressure MAX: 10 or 25 PSI
Temperature compensation range: -30 ° F to 140 ° F (-34 ° C to 60 ° C)
Material: Die cast aluminum shell
Medium: LNG, city gas, LPG, air, inert gas, etc
Description
AL-425 Diaphragm Meter
Product Overview
The AL-425 Diaphragm Meter is designed for metering a variety of gases in large residential or small commercial applications. It operates at pressures up to 25 PSIG and flow rates up to 425 SCFH at a differential pressure of 1/2” W.C.
Key Features
Die-cast aluminum case
Oil-impregnated, self-lubricating bushings
Molded, convoluted diaphragms for smooth operation and long life
Rigid, reinforced flag rods for positive alignment and sustained accuracy
Graphite-filled phenolic valves to minimize wear
Long-life, low-friction grommet seals
Single-coat polyester primer with high-solids polyurethane top coat
Security seals that indicate tampering
Advantages
Temperature compensation available from -30°F to 140°F (-34°C to 60°C)
Capacity: 425 SCFH (12.0 m³/h) for 0.60 specific gravity gas at 1/2-inch W.C. differential
AMI/AMR compatibility
Meets ANSI B109.1 specifications
Measurement Canada accredited
Applications
Ideal for larger residential or small commercial/industrial installations. Excels in accuracy retention and life-cycle maintenance economies.
Options
Regular or Temperature Compensated models
Pointer or odometer index
2 ft³ or 0.05 m³ drive
Connection sizes: 20 LT, 30 LT, 45 LT, and others
Maximum Allowable Operating Pressure (MAOP): 10 or 25 PSIG (690 or 1724 mBar)
Pressure compensating indexes
Standard or UV-protected index covers
Meter bars
Connection sets
Remote Volume Pulsers
Center-to-center connections: 7” or 8.25”
Capacities (for 0.60 specific gravity gas)
| Line Pressure PSIG (mbar) | Differential Inches W.C. (mbar) | SCFH (m³/h) |
|---|---|---|
| 0.25 (17) | 1/2 (1.2) | 425 (12.0) |
| 0.25 (17) | 2 (5) | 898 (25.4) |
| 1 (69) | 2 (5) | 920 (26.1) |
| 2 (138) | 2 (5) | 955 (27.0) |
| 5 (345) | 2 (5) | 1038 (29.4) |
| 10 (690) | 2 (5) | 1154 (32.7) |
| 15 (1035) | 2 (5) | 1269 (35.9) |
| 20 (1380) | 2 (5) | 1367 (38.7) |
| 25 (1724) | 2 (5) | 1462 (41.4) |
Special Notes
Propane capacity: 268 cfh (7.6 m³/h)
Butane capacity: 234 cfh (6.6 m³/h)
Proof Curve
The AL-425 proof curve illustrates performance stability across flow rates from 0 to 500 SCFH (0–14.2 m³/h), maintaining accuracy within a narrow band (96%–103%).
Additional information
| Brand |
Honeywell |
|---|
