AVD(S) is a self-acting pressure reduction controller primarily for use in district heating systems. The controller is normally opened and closes on rising pressure. The controller has a control valve, an actuator with one control diaphragm and a spring(s) for pressure setting.
VFG 2
Valves for heating, district heating and cooling systems. The valves can be used with following actuators: Thermostats (TR) AFT...; Safety Temperature Monitor (STM) STFW and Actuators AMV(E) 655, 658 , 659.
VFG 2 / VFGS 2
The controllers STFW/VFG(S) 2 and STFW/AFT/VFG 2 are used for temperature control and temperature monitoring of drinking water and heating systems.
