The VC hydronic valve consists of a valve body and replaceable characterized cartridge assembly. Depending on the valve model selected, they can be used with a VC2114 or VC8114 series actuator to provide on-off flow control, or with a VC6930 or VC7930 series actuator to provide proportional flow control. Two way bodies may be plumbed in either direction. Three-way bodies may be used in either diverting or mixing applications.