Attuatori termostatici

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. Combinations: temperature controller, safety temperature monitor type STFW.

Type-tested according to EN 14597 in connection with the following valves:VFG 2, VFG 21, VFGS 2, VFG 33 and VFU 2.

AVT

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.

The temperature controller is type-tested according to EN 14597.

Main data:

• DN 10-25
  
• k_v 0.25 -4.0 m³/h
  
• PN 10
  
• Setting range: 43 … 65 °C
  
• Temperature:
  

• Return mounting

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
  

• DN 10-25
  
• k_v 0.25-4.0 m³/h
  
• PN 10 with RAV-/8, VMT-/8 and KOVM valves
  

• Setting ranges:
  

• Temperature:
  

• Flow and return mounting

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