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Series-DR4
Glass Flowmeters for Air/Water, 1.5X Magnification, Durable, Industrial
- High-flow glass flow meter with direct-reading scale for air or water - built for demanding industrial service
- Wetted materials: borosilicate glass tube, 316 SS float, PTFE stops; brass or 316 SS fittings
- Rated up to 200 psig (13.8 bar) and 250 °F (121 °C) for rugged process environments
- Permanently-fused ceramic scale and 1.5× magnification lens for clear readings and reduced fatigue
Series-DR4
From
SGD
2,158.96
Product Overview
- Accuracy Detail ± 10% FS @ 70°F (21.1°C) and 14.7 psia (1 atm absolute)
- Gas Flow, Min 0.5 SCFM
- Mounting Orientation Vertical
- Measurement Pressure Type Gauge
- Process Connection Size 3/8 in
- Process Connection Type NPT Female
- Repeatability ± 0.25%
- Repeatability Note ± 0.25% of scale reading
- Series ID Series-DR4
- Turndown Ratio 10:1
Supported Applications
The Dwyer Series DR4 High Flow Glass Flowmeters provide a direct reading solution for fluid flow indication at higher capacity levels. Designed to withstand harsh industrial applications, these variable area meters are configured with permanently fused ceramic scales and integral float guides.
- Measurement of compatible gases or liquids
- Dedicated air (scfm) and water (GPM) scale options for direct reading without conversion
- Industrial environments requiring durable glass construction with safety blow-out back panels
Operating Conditions & Performance
The Series DR4 operates within specific temperature, pressure, and accuracy envelopes defined by the series specifications. The meters feature a 10:1 turn-down ratio and utilize reflective plastic backgrounds with 1.5X magnification lenses to reduce eye fatigue.
- Accuracy: ±10% FS @ 70°F (21.1°C) and 14.7 psia (1 atm absolute)
- Repeatability: ±0.25% of scale reading
- Temperature Limits: 250°F (121°C)
- Pressure Limits: 200 psig (13.8 bar)
- Mounting Orientation: Vertical mounting required
Measurement Ranges
The series supports the following flow ranges for air and water on a 127 mm scale length:
- Air: 0.2-4 scfm (5-120 SLPM), 0.5-11 scfm (20-320 SLPM), or 1-16 scfm (20-500 SLPM)
- Water: 0.1-2 GPM (0.5-8 LPM), 0.2-4 GPM (1-16 LPM), or 0.5-5 GPM (1-22 LPM)
Configuration Options
The Series DR4 is configurable across valve options, wetted materials, and scale types to match specific process requirements.
Housing and Valve Options
- Without Valve: Models available with Brass or 316 SS end fittings (e.g., DR4101, DR4201)
- With Valve: Standard configuration includes a 6-turn needle valve; models available in Brass or 316 SS (e.g., DR4141, DR4241)
Wetted Materials
- Flowtube: Borosilicate glass
- Float: 316 SS
- Float Stops: PTFE
- End Fittings: Brass or 316 SS (depending on model selection)
- O-rings: Buna-N on brass models; fluoroelastomer on stainless steel models
Scales and Connections
- Scale Type: Direct reading 127 mm scales for air or water (add suffix "M" for metric scale)
- Process Connection: 3/8" female NPT
Key Product Differences
The Series DR4 model numbering distinguishes between valve inclusion and material construction. Models ending in specific digits correspond to the flow range, while the prefix indicates configuration.
- Brass Construction: Identified by models such as DR410X (without valve) or DR414X (with valve).
- Stainless Steel Construction: Identified by models such as DR420X (without valve) or DR424X (with valve).
The series includes a safety blow-out back panel for additional protection. Care must be taken during installation to avoid sudden pressure surges, which can damage the meter if exposed directly to full line pressure.
PDFs & Manuals
