CAC Actuator
The CAC Actuator is a key component in the aircraft’s bleed-less air management system. It operates within the aircraft’s electrical cabin air compressor (CAC) system, replacing the traditional bleed air taken from engines.
This actuator regulates airflow through the CAC by controlling the inlet deflector door and associated temperature and pressure regulation valves. It ensures clean, pressurized, high-temperature air is delivered to the environmental control system (ECS) and the trim air system.
Working with the Pack Control Unit (PCU), the actuator adjusts compressor performance for optimal efficiency, surge prevention, and temperature control. The CAC actuator enables dynamic response to changing flight conditions by precisely managing compressor inputs and outputs.
Constructed with lightweight aerospace-grade materials and designed for electric operation, it reduces system weight, improves energy efficiency, and lowers maintenance complexity. Its role is central to the aircraft’s more-electric architecture, contributing directly to fuel efficiency, cabin comfort, and system redundancy.

Company Overview
SM Tech Co., Ltd. located in Asan, Chungcheongnam-do, Republic of Korea, is a specialized manufacturer of high-precision components for the aerospace, defense, and space industries. Since its establishment, the company has built strong expertise in the design, machining, and assembly of critical mechanical and structural parts for both civil and military aircraft, helicopters, and space launch vehicles.
We are a trusted supplier for key domestic and international aerospace programs, including fighter jets, helicopters, and commercial aircraft. Our main products include actuators, landing gear components, hydraulic control systems, and precision-machined parts and assemblies, all designed to meet stringent quality and performance standards.
SM Tech is certified to AS9100D and ISO 9001, ensuring a robust quality management system that covers every stage of production—from raw material inspection to final product testing. We operate advanced manufacturing facilities equipped with CNC lathes, machining centers (MCT), and 5-axis machining capabilities, enabling the production of complex and high-tolerance components.
With a track record of indirect exports to major global aerospace companies, including components installed on Boeing commercial aircraft, SM Tech continues to expand its presence in the global market. Our commitment to continuous technological innovation, process improvement, and customer satisfaction allows us to provide reliable, high-quality solutions for the most demanding aerospace applications.