Thermostatic Sensors

AFT 06, AFT 17

The thermostats operate according to the liquid expansion principle. The set point adjuster is directly fitted to the actuator. There are two sensor designs with different time constants: AFT 06 smooth sensor ~120 sec ; AFT 17 spiral sensor ~20 sec Temperature control of domestic hot water systems with storage tanks and restriction of the return flow temperature in district heating transfer station are the main fields of application.

AVT

Compression fittings

QTL

QTL is a self-acting thermostatic actuator primarily for use for temperature control of small hot water cylinders. It is dedicated to AVQML and compatible with old AB-QM 3.0 DN15 valves.

RAVI

RAVI is self-acting thermostatic actuator primarily for use for temperature control of small hot water cylinders - either storage type cylinders or instantaneous hot water heaters. RAVI can be combined with 2-way valves: • RAV-/8, • VMT-/8 and • VMA Controller closes on rising temperature.

RAVK

RAVK is self-acting thermostatic actuator primarily for use for temperature control of small hot water cylinders (e.g. storage tanks) or heat exchangers in radiator heating systems. RAVK can be combined with: - 2-way valves RAV-/8, VMT-/8, VMA, or - 3-way valves VMV and KOVM Controller closes on rising temperature. RAVK 25-45 oC can be combined with VMV DN 15 and DN 20 valves. This combination is used for temperature control in a mixing loop for hot water service.

RAVV

The RAVV is a non-electric operator that thermostatically controls the flow of water through the VMT 2-way valve. The self regulation of temperature control through the RAVV and VMT assembly is primarily used for storage tanks, radiant heating or heat exchanger applications.

STFL

STFW

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.

STM