Type 3221- T3221 Analog Weatherproof Regulators
The Bellofram Precision Controls Type 3221 is a dual-loop analog weatherproof pressure regulator with an integrated pneumatic booster and remote feedback capability. It accepts analog command signals and uses non-bleeding solenoid valves with an internal pressure sensor for closed-loop pneumatic control. The built-in booster provides forward flow up to 15 SCFM and reverse flow up to 7 SCFM, while the second loop accepts 0-10 VDC feedback from a remote sensor. Analog pressure monitoring and logic status outputs support integration with automated web tensioning, painting, tire manufacturing, and other industrial processes.
Features:
- Weatherproof Enclosure
- User Selectable Input
- Analog Monitor Output
- Single Loop or Dual Loop Control
- Web Tensioning
- Automotive Painting
- Tire Manufacturing
- High Flow Process Applications
E/P Supply Requirements
15-24 VDC (80-325 mA)
Voltage Input Ranges (DC)
0-10
Current Input Ranges (mA)
4-20
Impedance Current (Ohms)
250
Logic Output
YES
Analog Monitor Output
YES
Internal Feedback (closed loop)
YES
External Feedback
OPTION
Minimum Supply Pressure (psi)
100% of output
Maximum Supply Pressure (psi)
110% of output
Output Pressure Range(s) (psi)
0-15
Flow Rate (scfm)
1.2
Exhaust Capacity (scfm) @ 5 psid
10
Exhaust Capture
YES
Air Consumption
Negligible
Repeatability (% of span, typ.)
0.2
Independent Linearity (% of span, typ.)
0.2
Hysterisis (% of span, typ.)
0.5
Accuracy (% of span, typ.)
0.5
Operating Temp (⁰C)
0⁰ - 60⁰
Output Gauge Port
no
Width x Depth x Height (in.)
2.3" x 2.3" x 5" max.
Supply Port
1/4" NPT
Output Port
1/4" NPT
Exhaust Port
No. 10-32 UNF-2B
Electrical Port (STD)
micro style 6 pin micro
Mounting Options
Manifold
Mounting Orientation Insensitivity
Excellent
External Span/Zero Adjustment
YES
Reverse Acting
OPTION
Impedance Voltage (Ohms)
10 K
Filter Output Pressure Ranges
0-10 PSIG,
0-30 PSIG,
0-60 PSIG,
0-100 PSIG,
0-120 PSIG,
0-150 PSIG
Filter Input Signal
4-20 mA,
0-10 VDC
Filter Port Size
1/4" NPT
Filter Maximum Supply Pressure
100 PSIG,
150 PSIG
Filter Maximum Accuracy
0.50%
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