Fixed & Variable Ratio Gas Mixers: Series 1220 & 2000
DESCRIPTION - FIXED RATIO 2000 SCFH MIXERS
The Western FRM2000 is a fixed ratio gas mixer. It has the same configuration as the VRM1200, but as a result of the fixed flow device, the mixture cannot be changed in the field. It is pre-calibrated at the factory. Although the tank and overall dimensions remain the same, the internal components allow flows up to 2000 SCFH while the mixer is still cycling.
specs
The Western VRM1200 is a variable ratio gas mixer for argon, carbon dioxide, helium, nitrogen and oxygen. The mixer is suitable for different applications such as welding, modified atmosphere packaging, process control and similar applications. The gas mixture can be changed in the field by adjusting a single calibrated dial located inside the mixer control box. The VRM 1200 gas mixer will deliver constant gas mixture concentration up to 1200 SCHF while the mixer is still cycling.
PRINCIPLE OF OPERATION
The supply gases are individually filtered at the inlet of the mixer to remove particles. the pressure of each gas is then regulated at the exact same pressure before entering their respective flow restrictors. The flow restrictors are adjusted to ensure the requested gas mixture. The gases are blended in a mixing tee before entering the surge tank. The tank is constantly monitored by a pressure switch which actuates the solenoid valve on and off to allow the mixture to fill the surge tank at a constant pressure and flow. The mixture pressure is controlled by a line regulator before entering the pipeline.
AVAILABLE MIXTURE SPECIFICATIONS |
| FIXED - FRM2000 |
VARIABLE - VRM1200 |
0-100% CO2 in Argon
0-100% Oxygen in Argon
0-100% Helium in Argon
0-100% Nitrogen in Argon
0-100% CO2 in Nitrogen
0-100% Oxygen in Nitrogen
0-100% Helium in Nitrogen
|
0-35% CO2 in Argon
0-10% Oxygen in Argon
0-50% Helium in Argon
0-50% CO2 in Nitrogen
Other Ranges Available
|
OTHER TECHNICAL SPECIFICATION |
FIXED VS. VARIABLE RATIO MIXERS |
| Flow capacity (still cycling): |
Fixed - FRM2000: 2000 SCFH
Variable -VRM1200: 1200 SCFH |
FIXED |
| Operating Temperature: |
-28.9° C to 37.8° C
-20° F to +100° F |
- Greater Mixture accuracy (+/-2% of minor gases)
- Wide range of mixtures
- Prevents operators from changing mixture concentrations
|
| Maximum Inlet Pressure: |
100-125 PSIG |
| Maximum Outlet Pressure: |
50 PSIG |
| Size of Pressure Gauges: |
2" |
| Surge Tank Pressure Relief Valve: |
150 PSIG |
| Outlet Connection: |
1/2" Female NPT |
| Inlet Connection: |
3/4" Female NPT |
VARIABLE |
| Filtering Element: |
40 Micron |
- Field adjustable mixture.
- For applications where mixture accuracy is not critical
- Possibility of changing mixture concentrations by operators.
|
| Tank Capacity: |
15 Gallons |
| Alarm: |
Optional |
| Power Requirement: |
110 VAC. 50/60 Hz. 5 Amp |
| Mixture Accuracy: |
+/-2% of Minor Gas |
