Trane VAL8853 Negative Pressure Valve 24V 3/4 Inch

The Trane VAL8853 is a 24-volt negative pressure valve specifically designed for commercial and industrial HVAC systems that use natural gas. Measuring about 3/4 inches and weighing around 2.18 pounds, it's a compact component that plays a significant role in safety and efficiency. This valve helps prevent negative pressure situations within the HVAC system. Negative pressure can occur due to exhaust fans or insufficient makeup air, potentially causing flue gasses to be drawn back into the building. The Trane VAL8853 uses a 24-volt signal to open and allow controlled amounts of fresh air into the system, maintaining a slight positive pressure and preventing harmful backdrafts. This promotes safe operation of the HVAC system and protects building occupants.