A diverting valve is a three-way control valve that directs flow from a single inlet to one or both of two outlet ports. Unlike mixing valves, diverting valves split a single incoming stream into multiple paths, enabling circuit switching and load balancing. They maintain flow continuity to either the primary or secondary circuit depending on control signals.
Technical Details
Diverting valves feature one inlet port and two outlet ports with equal percentage or linear characteristics. They are sized based on maximum outlet port flow requirements, typically available in DN15 to DN100 sizes. The valve stem position determines flow division, with full open to primary and full open to secondary configurations available.
Applications in HVAC
Diverting valves direct chiller return water to either the main condenser loop or to a free-cooling tower during low outdoor temperatures. They switch heating supply between multiple zones or bypass circuits to maintain setpoint temperatures. Common applications include condenser water isolation and load optimization.
Practical Significance
Diverting valves improve energy efficiency by enabling selective circuit operation based on demand. They require coordinated control logic to prevent simultaneous opening of both outlets, which would cause pressure drop and reduced performance. Proper pressure balancing between outlet ports is essential for stable operation.