Overview
The ACI EPC2LG is a high-performance electronic-to-pneumatic transducer that converts analog input signals into proportional branch line pressure for HVAC control applications. Designed for precision airflow and pressure control, the EPC2LG features a dual valve configuration that ensures stable operation and fast response times.
This transducer is ideal for use in modern building automation systems requiring accurate and responsive control of pneumatic actuators, dampers, and valves. It comes with an integrated pressure gauge for easy monitoring and field adjustment.
Features
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Converts analog electrical input signals into proportional pneumatic pressure output
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Dual valve design for increased stability and higher flow capacity
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Built-in pressure gauge for real-time branch pressure indication
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Factory-set default ranges of 0–5 VDC, 0–10 VDC, or 4–20 mA input with corresponding 0–10 psi, 0–15 psi, or 0–20 psi output
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Low air consumption and fast response time for precise control
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Compact, lightweight housing for wall or panel mounting
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Field-adjustable output range via internal potentiometer
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Durable metal housing suitable for commercial and industrial installations
Specifications
| Specification | Details |
|---|---|
| Model / Part Number | EPC2LG |
| Manufacturer | ACI (Automation Components, Inc.) |
| Type | Electronic-to-Pneumatic Transducer |
| Input Signal | 0–5 VDC (default), 0–10 VDC, or 4–20 mA |
| Output Pressure Range | 0–10 psi (default), 0–15 psi, 0–20 psi |
| Supply Pressure | 25 psi minimum, 30 psi nominal, 40 psi maximum |
| Flow Capacity | 500 SCIM (8.2 SCFH @ 20 psi supply) |
| Air Consumption | < 150 SCIM (2.5 SCFH) |
| Accuracy | ± 0.5 psi (typical) |
| Linearity | ± 1% of span |
| Repeatability | ± 0.2% of span |
| Operating Temperature | 32 °F to 140 °F (0 °C to 60 °C) |
| Response Time | < 1 second |
| Connections | ¼″ barbed fittings (supply, branch, exhaust) |
| Gauge | 0–20 psi integrated pressure gauge |
| Housing Material | Anodized aluminum with mounting bracket |
| Mounting | Wall or panel mount (standard) |
| Weight | 0.5 lb (0.23 kg) |
| Power Supply | 24 VDC (loop or voltage powered) |
| Approvals | RoHS compliant, CE certified |
Applications
The EPC2LG Pneumatic Transducer is engineered for precise air pressure control in:
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Building automation and energy management systems
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HVAC pneumatic control loops
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Damper and valve actuation systems
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Air handling units (AHUs) and VAV boxes
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Laboratory and cleanroom pressure balancing systems
This transducer is commonly used where fast, linear response and reliable branch line pressure are essential to maintain system balance and performance.
Benefits
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Provides smooth, accurate conversion from electronic to pneumatic signals
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Dual-valve configuration prevents overshoot and hunting
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Simple calibration with onboard adjustment potentiometer
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Integrated gauge allows real-time visual pressure confirmation
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Compact design fits tight control panels and mechanical rooms
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Backed by ACI’s long-term reliability and warranty support



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