Three-quarter view of a rectangular constant air volume controller

Системы распределения воздуха в чистых помещениях

Контролер постоянного объема воздуха

A self-powered duct regulator whose aerodynamic blade and calibrated spring mechanism hold a selected airflow across a defined pressure range.

Pressure-Compensating Blade
Adjustable Airflow Setpoint
No External Control Power
Supply or Extract Service

Запрос котировки Просмотреть продукты

Введение продукции

The constant air volume controller uses the force acting on an aerodynamic blade to oppose a calibrated spring or bellows mechanism. As duct pressure rises, the blade moves toward the throttling position; as pressure falls, it opens to preserve the selected airflow. The setpoint is adjusted on an external scale without entering the air path. A rectangular flanged casing supports direct duct installation, while low-friction bearings and an accessible mechanism allow stable movement through the working pressure range.

Основные характеристики

Aerodynamic blade movement compensates for upstream pressure variation without a separate flow controller.

An external scale allows the nominal volume-flow setting to be changed after the duct is installed.

Low-friction bearings and a protected spring mechanism promote repeatable response at modest differential pressure.

Optional acoustic treatment and a downstream silencer reduce regenerated noise where the regulator absorbs a large pressure difference.

Обеспокоенность клиентов продуктами

Reliable constant-volume operation requires sufficient differential pressure, uniform inlet airflow and an adjustment range that matches the actual branch duty.

Branch airflow increases whenever the main duct pressure rises.The pressure-responsive blade closes proportionally to absorb the additional pressure and stabilize the set volume.

A regulator selected below its minimum operating pressure never reaches the scheduled airflow.The controller size and setpoint are matched to the available branch pressure over the fan operating range.

An elbow directly at the inlet creates a biased velocity profile and unstable blade motion.A straight approach or suitable flow-straightening section presents the controller with a more even face velocity.

Throttling noise becomes objectionable above a ceiling near quiet work areas.A larger controller, acoustic casing or matched secondary silencer reduces local velocity and regenerated sound.

Типичные приложения

Cleanroom constant make-up air branchesLaboratory general exhaustHospital room ventilationToilet and utility extract systemsConstant-volume process support areas

Технические параметры

Representative construction data for a rectangular mechanical CAV controller are shown below.

Основной материал	Galvanized-steel aerodynamic control blade with stainless spring element and low-friction polymer bearings
Толщина панели	0.8–1.2 mm control blade and casing sheet
эффективная ширина	200–1000 mm nominal rectangular duct width
Максимальная длина	Up to 800 mm casing length in the airflow direction with acoustic section
Толщина линий стали	0.8–1.0 mm galvanized external casing and flanges
Плотность ядра	Approximately 7850 kg/m³ for the steel blade material
Теплопроводимость	Approximately 50 W/(m·K) through the galvanized aerodynamic control blade
Поверхностная отделка	Mill-galvanized casing with corrosion-protected adjustment hardware
Объединенный тип	Flanged rectangular casing with internally pivoted blade and external calibrated setpoint mechanism
Customization	Доступно в зависимости от предполагаемого применения и операционной среды.

Доступные варианты

Multiple factory airflow rangesAcoustic casing and secondary silencerSupply-air or extract-air calibrationPowder-coated or stainless-steel casing

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