AFA-VFG2(1)

The controller is a self-acting pressure relief controller primarily for use in district heating systems. The controller is normally closed and opens on rising pressure. The controller has a control valve, an actuator with one control diaphragm and a spring(s) for pressure setting. Further on two valve versions are available: – VFG 2 with metallic sealing cone – VFG 21 with soft sealing cone