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RPM-LV Variable Airflow Controller (Low Velocity)

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RPM-LV Variable Airflow Controller (Low Velocity)

A precision VAV regulator for round ducts, engineered to operate with exceptional accuracy at very low air velocities and minimal pressure drop. Features a patented compact design.

RPM-LV

Product Description

Key Features & Benefits

  • Low Velocity Precision

    Operates accurately from just 0.5 m/s with a control pressure loss above only 2 Pa.

  • Patented Compact Design

    Very short length and lightweight. No sharp internal parts. All components accessible from outside the duct.

  • Quiet Operation

    Engineered for low noise levels, ideal for noise-sensitive environments like offices and hotels.

  • Minimal Installation Space

    No upstream straight duct required in many configurations. Elbows can be installed directly before/after.

  • Integrated Smart Controller

    Includes Belimo actuator with sensor, electronics, and analog/digital communication (0-10V, MP-Bus, Modbus, BACnet).

  • Energy Optimized

    Extremely low minimum flow (6.25% of nominal) maximizes turndown ratio and part-load efficiency.

Technical Specifications

Duct Diameter

80 mm to 315 mm

Airflow Range

9 to 2,244 m³/h (2.5 to 623 l/s)

Velocity Range

0.5 m/s to 8 m/s

Control Pressure Drop

2 Pa to 600 Pa

Accuracy

From ±4% of set value

Temperature

0°C to +50°C

Installation & Control

Mounting

Any position: horizontal, vertical, or angled.

Flow Direction

Must follow the arrow on the unit body.

Duct Connections

Direct connection to round (SPIRO) ducts with seal. No flanges.

Flexible Layout

90° elbows can be installed directly upstream/downstream in recommended orientations.

Connection & Setup

24V power. Set Vmin/Vmax via Belimo tools (NFC, software). Factory pre-set.

Use Cases

  • Premium Office Spaces
  • Luxury Hotels & Suites
  • Hospital Patient Rooms
  • University Lecture Halls
  • Broadcast Studios & Theaters
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