Three-quarter view of constant air volume terminal box with round inlet and control enclosure

Системы распределения воздуха в чистых помещениях

Константный объем воздуха терминальный ящик

A single-duct terminal that measures primary airflow and positions an internal damper to maintain a fixed supply or extract volume as upstream pressure changes.

Pressure-Independent Air Volume
Integrated Flow Pickup
Low-Leakage Damper
Accessible Control Enclosure

Запрос котировки Просмотреть продукты

Введение продукции

The constant air volume terminal box provides a defined air quantity to a cleanroom branch without requiring the main duct pressure to remain perfectly steady. A multi-point inlet sensor reads velocity pressure across the round connection, while a calibrated controller drives the internal damper to the scheduled setpoint. The rectangular galvanized-steel casing transitions directly to downstream ductwork and keeps the actuator, tubing and controller outside the primary airstream for inspection. Optional acoustic lining and discharge attenuator sections can control breakout and regenerated sound in ceiling voids.

Основные характеристики

A multi-point inlet pickup averages velocity across the branch instead of relying on a single local pressure reading.

Closed-loop damper control maintains the selected air quantity through normal variations in system static pressure.

The external control enclosure leaves the actuator and pressure tubing reachable without opening the supply duct.

A rectangular slip-and-drive discharge connection simplifies transition to branch ductwork or a downstream reheat section.

Обеспокоенность клиентов продуктами

A constant-volume branch must hold its scheduled flow despite filter loading and upstream pressure movement while remaining quiet and serviceable above the ceiling.

Branch airflow rises whenever the main supply fan increases static pressure.The flow sensor and modulating damper continuously correct the terminal opening to retain the programmed volume.

A poorly selected inlet size produces unstable readings at low cleanroom airflow.Multiple inlet diameters and calibrated pickup factors allow the sensor velocity to stay within a useful control range.

Damper-generated noise travels directly to a ceiling diffuser.A lined casing or downstream attenuator section absorbs regenerated sound before the branch enters the occupied space.

Controls cannot be inspected after adjacent ceiling services are installed.A side-mounted removable enclosure groups the actuator, controller and tubing in one visible service location.

Типичные приложения

Constant supply airflow to clean production roomsFixed extract volume from pressure-controlled support spacesGowning-room ventilation branchesLaboratory make-up air terminalsMedical-device assembly HVAC zones

Технические параметры

Representative construction ranges for a single-duct cleanroom constant-volume terminal are shown below.

Основной материал	Galvanized-steel casing with steel damper blade, aluminum flow pickup and external control assembly
Толщина панели	0.8–1.2 mm galvanized casing panels
эффективная ширина	200–800 mm rectangular discharge width
Максимальная длина	Up to 1200 mm including optional attenuator or reheat section
Толщина линий стали	0.8–1.2 mm galvanized sheet-steel casing
Плотность ядра	Approximately 7850 kg/m³ for the steel casing and damper components
Теплопроводимость	Approximately 45–60 W/(m·K) for the steel casing and damper components
Поверхностная отделка	Clean mill-galvanized casing with optional white powder-coated exterior
Объединенный тип	Round beaded inlet collar and rectangular slip-and-drive discharge connection
Customization	Доступно в зависимости от предполагаемого применения и операционной среды.

Доступные варианты

Pressure-independent digital or analog controlsFactory-set constant-volume mechanical controlInternal acoustic liner or integral silencerHot-water or electric reheat section

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