PICV stands for Pressure Independent Control Valve, which is a type of control valve commonly used in HVAC systems. Some synonyms for the term PICV include pressure-independent valve, flow control valve, variable flow valve, and automatic balancing valve. These valves are designed to regulate flow rates independently of pressure changes in the HVAC system, allowing for precise control and energy savings. Some other related terms include control dampers, airflow control valves, and water balancing valves. Depending on the specific application and system requirements, different types of control valves and flow regulators may be used instead of or in conjunction with PICVs.