Complete cleanroom airflow control package with aluminum averaging probe, controller and blue damper actuator

Cleanroom Control and Environmental Monitoring Systems

Airflow Control System

A closed-loop airflow package that measures supply or exhaust volume and drives a modulating damper to maintain the commanded cleanroom air quantity.

Closed-Loop Air Volume
Multi-Point Duct Sensing
Fast Damper Actuation
Stable Low-Flow Control

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Product Introduction

The airflow control system combines a duct averaging sensor, differential pressure transmitter, airflow controller and modulating damper actuator. The controller converts the measured velocity pressure into air volume using the configured duct area and continuously positions the damper. Low-flow cutoffs and sensor filtering prevent noisy readings from driving the actuator unnecessarily. The package can regulate supply, return or exhaust air and can share measured volume with the room pressure controller for coordinated cascade control.

Key Features

Averaging duct pickup samples multiple points instead of relying on one local velocity.

Configured duct dimensions convert pressure signal into a usable airflow-volume value.

Modulating actuator feedback confirms the commanded damper position was reached.

Filtering, deadband and low-flow handling stabilize control near minimum ventilation rates.

Customer Product Concerns

Reliable air-volume control depends on representative sensing and an actuator response matched to the duct and pressure conditions.

A single-point duct reading changes with turbulence and elbow location.A multi-point averaging pickup provides a more representative velocity-pressure signal.

The damper hunts around the minimum airflow setpoint.Appropriate filtering, deadband and low-flow cutoff prevent reaction to measurement noise.

The displayed air volume is wrong after a duct size change.Field-configurable duct area and sensor coefficient recalculate volume for the installed branch.

A disconnected actuator is not noticed until room pressure drifts.Position feedback and airflow deviation alarms identify failed movement before the room leaves its normal band.

Typical Applications

Cleanroom supply-air branchesProcess exhaust regulationLaboratory make-up airPressure-cascade airflow tracking

Technical Parameters

Typical construction for a cleanroom duct airflow controller and actuator package is listed below.

Core Material	Aluminum averaging probe, flame-retardant polymer controller and galvanized steel damper frame
Panel Thickness	60-140 mm controller and transmitter depth
Effective Width	120-300 mm controller width
Maximum Length	Averaging probes up to 2000 mm
Steel Facing Thickness	0.8-1.5 mm galvanized steel damper casing
Core Density	2650-2750 kg/m³ for aluminum probe components
Thermal Conductivity	150-220 W/(m·K) for the aluminum sensing probe
Surface Finish	Natural anodized aluminum probe with white controller and zinc-coated damper frame
Joint Type	Flanged duct pickup with barbed pressure ports and direct-coupled damper actuator
Customization	Available based on the intended application and operating environment.

Available Options

Supply or exhaust configurationCircular or rectangular duct probesBACnet or Modbus controllerSpring-return damper actuator

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