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Miller® Carbon Dioxide (CO2) Single Stage Flowgauge Regulator
Airgas Part #:MIL31-50-320
Manufacturer Part #:31-50-320
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$258.47
Each
$258.47
/Each
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Item Details
- The ITW / Miller Smith 31-50-320 is a single-stage, medium-duty industrial pressure and flow regulation system designed for Gas Metal Arc Welding (GMAW/MIG) and Gas Tungsten Arc Welding (GTAW/TIG) shielding gas applications. It utilizes a calibrated dial indicator for volumetric delivery of Carbon Dioxide (CO2) from high-pressure industrial cylinders and features a pressure-compensated design to maintain flow accuracy.
Features
- Sure-Seat™ High-Pressure Filtration System: Encases the high-pressure seat with a sintered copper-nickel matrix filter to trap particles and prevent seat ignition.
- Dual Filter Design: Protects high-pressure seat from debris, rust, and scale to reduce repair costs.
- Decay-Rise Compensation: Compensates for delivery pressure rise as source cylinder pressure diminishes.
- Auto-Reset Safety Relief Valve: Integrated external mechanism vents gas during over-pressure spikes and automatically resets.
- Machined Relief Valve Threads: Supports tube fittings for routing hazardous gas away from the operator.
- Shatter-Resistant Gauges: 2-inch gauges with polycarbonate lenses to resist industrial impact.
- Corrosion Protection: Nickel-plated bonnet and forged brass body resist gas porosity leakage and environmental degradation.
- Color-Coded Labels: Provides gas service identification and technical performance data.
Specifications
- Manufacturer: Miller Electric Manufacturing / ITW (Illinois Tool Works)
- Brand / Line: Miller Smith Equipment (Series 30 / Series 31)
- Part Number (MPN): 31-50-320
- Gas Service Compatibility: 100% Carbon Dioxide (CO2)
- Regulator Type: Single-Stage, Pressure-Compensated Flow Gauge Regulator
- Capacity Duty Rating: Medium-Duty / Industrial Grade
- Inlet Connection Standard: CGA-320 (0.825"-14 NGO, Female Fitting, Right-Hand Thread)
- Outlet Connection Thread: 5/8"-18 UNF Internal Right-Hand (Standard B-Size Welding Hose Fitting)
- Maximum Inlet Pressure: 3,000 PSIG (206.8 bar)
- Maximum Delivery Pressure (Preset): 50 PSIG (3.45 bar)
- Flow Measurement Range: 10 to 50 SCFH (Standard Cubic Feet per Hour) / 24 L/min
- Measurement Accuracy: ± 2% of full-scale actual gauge reading
- Regulator Body Material: Solid Forged Machined Brass
- Regulator Bonnet Material: Nickel-Plated Die-Cast
- Diaphragm Material: Nylon-reinforced Laminated Neoprene composite elastomer
- Filter Matrix Material: Sintered Copper-Nickel Alloy
- Gauge Lens Material: Heavy-wall Clear Polycarbonate
- Gauge Casing Material: 2-inch (51mm) Stamped Steel
- Overall Physical Length: 3-1/3 inches (84.7 mm)
- Net Weight: 2.86 lbs (1.30 kg)
- Warranty: 3 Years (Miller's Gas Equipment and Gas Control Warranty)
- Standards Compliance: UL Listed, CGA V-1, ISO Quality Compliance
Applications
- Gas Metal Arc Welding (GMAW/MIG) shielding gas delivery
- Gas Tungsten Arc Welding (GTAW/TIG) shielding gas delivery
- Short-circuit, globular, and spray-arc welding processes
- Structural steel workshop fabrication
- Automotive manufacturing assembly plants
- Industrial repair and maintenance facilities
- Tank-cart configurations where vertical flowmeters are susceptible to mechanical damage
Product Attributes
Regulator Type
» Single Stage Regulator» Flowgauge Regulator
Gas Service
» Carbon Dioxide (CO2)Delivery Rate
» 0 - 50 psig
