This pressure control device is designed to regulate the pressure of HVAC systems. It has a specific range of pressure settings, with an open setting of 460 and a close setting of 265. The device is compatible with open and closed systems, making it versatile for various HVAC applications. Its compact size allows for easy installation in tight spaces, and its durable construction ensures long-lasting performance. With this pressure control device, HVAC service technicians can ensure optimal system performance and prevent damage from overpressure or underpressure.