In numerous fields such as precision fluid measurement and control, industrial automation, new energy, semiconductors, and scientific research and testing, pressure controllers, as core closed-loop measurement and control devices, assume the role of… Precise voltage regulation, pressure adjustment, and safe pressure relief It plays a critical role and serves as the cornerstone for ensuring stable production-line operation, accurate experimental data, and safe equipment performance.

For nearly sealed operating conditions such as micro‑leak testing and cavity processing, conventional pressure controllers rely on single‑channel regulation and can only perform pressurization, making it impossible to implement depressurization. In contrast, a dual‑valve pressure controller employs two independently controlled proportional valves—one for inflation and one for depressurization—working in coordinated closed‑loop control. This enables bidirectional regulation of both pressurization and depressurization, making it the preferred solution for pressure control in sealed‑volume applications. Our company’s ACU20PCD   The series of dual‑valve pressure controllers is precisely the high‑precision automated measurement and control equipment designed for this application. 

▲ ACU20PCD-LC Dual-valve pressure controller 

ACU20PCD Series Dual-Valve Pressure Controller It offers exceptional control within a closed chamber, delivering high precision. Featuring a dual-valve design, one valve maintains the injected medium while pressurizing or holding pressure, and the other is used for depressurization. Precise pressure regulation and stabilization can be achieved simply by connecting to the vessel’s access port, minimizing the waste of costly gases and making it ideal for applications with stringent requirements for pressure stability.

ACU20PCD Series Dual-Valve Pressure Controller The core lies in Two sets of independent proportional solenoid control valves Compared with the single-valve control scheme, the dual-valve design can actively mitigate pressure overshoot and, to some extent, compensate for minor leaks in semi‑closed systems, thereby enhancing pressure regulation capability and dynamic response performance. 

▲ ACU20PCD High-pressure intelligent pressure controller ( 10 MPa Standard /  Maximum support 40MPa ) 

The ACU20PCD dual‑valve pressure controller integrates a pressure sensor and a digital control circuit, employing a proportional solenoid valve for continuous regulation. It can rapidly adjust the air‑inlet and pressure‑relief processes based on pressure feedback. In addition to a standard RS‑485 output, this pressure controller offers analog input and output signals. Paired with a touch‑screen display, users can operate it via PLCs, PCs, or directly through the device’s built‑in touchscreen to set pressure, adjust parameters, and monitor operation, thereby meeting the control requirements of automated production and experimental testing.

In terms of interface configuration, the system is equipped with an inlet, a chamber‑to‑chamber connection port, and an exhaust port. During pressurization, gas flows from the inlet through the chamber‑to‑chamber connection port into the chamber; during depressurization, gas within the chamber is discharged via the exhaust port, thereby achieving pressure relief. The exhaust port may also be connected to a vacuum pump or a dedicated exhaust‑treatment unit, as required by the process; however, such connections must be verified in light of the equipment’s structural design, allowable backpressure, and medium‑specific safety requirements.

For demanding operating conditions, we can provide customized solutions featuring high pressure, low pressure drop, and high-temperature capabilities. 

▲ ACU20PCD R Low-pressure-drop dual-valve pressure controller 

▲ ACU20PCD High-Temperature Dual-Valve Pressure Controller 

The valve of a pressure controller is a core component, and different valves are selected to suit various application scenarios. Most conventional proportional valves on the market are limited to low-pressure conditions below 1.0 MPa, making it difficult to meet stringent measurement and control requirements such as high pressure, large flow rates with low pressure loss, and high-temperature media. ACU20PCD  Leveraging a self-developed valve body design and a high-pressure‑resistant sealing system, it can directly and precisely regulate pressure up to 10 MPa (with optional configurations available).   High-pressure nitrogen or compressed air at 40 MPa. When operating at low pressure and high flow rates, our ACU20PCDR low‑pressure‑drop dual‑valve pressure controller is an ideal choice. Featuring a low‑pressure‑drop valve‑block design, it is tailored for low‑pressure, high‑flow applications, delivering bidirectional pressurization and depressurization while minimizing airflow resistance, thus ensuring stable pressure regulation in large‑volume sealed chambers. For applications involving high‑temperature media, the ACU20PCD high‑temperature dual‑valve pressure controller is available; in addition to reliable pressure control, it incorporates a dedicated heat‑dissipation structure to meet the demanding requirements of pressure measurement and control in high‑temperature fluid‑filled systems.

The core challenge in bidirectional pressure control for sealed chambers lies in simultaneously balancing dynamic response speed, overshoot suppression, steady-state regulation accuracy, and leak compensation capability. The architecture of independent proportional regulation using dual valves overcomes the inherent limitations of single-valve pressure controllers that offer only unidirectional adjustment, making it the preferred technological approach for pressure control in sealed chambers. ACU20PCD   It is not only an outstanding pressure controller but also a pivotal hub that bridges “pneumatic control” and “precision manufacturing,” providing high‑precision, highly reliable solutions for fluid measurement and control in domestically produced high‑end equipment.

For precise equipment selection tailored to your operating conditions, and for detailed product specifications and integration solutions, please contact us to receive a customized selection guide and a high‑efficiency pressure solution designed specifically for your production line.