- Termostatic head
- Valves with thermostatic option for double pipe
- Double settings thermostatic valves for double pipe systems
- Thermostatic kit and thermostatic valves for double pipe systems
- Manual valves and lockshields for double pipe systems
- Four-way valves with thermostatic option for single pipe and double pipe systems
- Single pipe manual valves
- Fittings for copper, pex-al-pex, pex pipe, radiator eccentrics, elbow fittings, rosette
- Single/double pipe distributors for panel with built-in thermostatic group
- Radiator air vents
- Valves and lockshields for design radiators
- Chromed thermostatic head and rosettes with pipe cover
266 | Temperature and pressure relief valve
The temperature and pressure relief valve discharges the hot water contained in a storage tank when the temperature is over 100°C or when the pressure is exceeding valve set value. The valve closes when the pressure and/or the temperature decreases within the set tolerances. The valve starts opening at
a temperature between 98°C and 100°C.
Codes and dimensions
| Art. | Size | Bar | Code |  | |
| 266 | 1/2”Mx1/2”F | 3 | 91266ADAF | 1 | 20 |
| 266 | 1/2”Mx1/2”F | 6 | 91266ADAN | 1 | 20 |
| 266 | 1/2”Mx1/2”F | 8 | 91266ADAQ | 1 | 20 |
| 266 | 3/4”Mx3/4”F | 3 | 91266AEAF | 1 | 20 |
| 266 | 3/4”Mx3/4”F | 6 | 91266AEAN | 1 | 20 |
| 266 | 3/4”Mx3/4”F | 8 | 91266AEAQ | 1 | 20 |
Related products
131 | Male anti-condensation valve on the 3 ways
Male anti-condensation valve on the 3 ways. Working temperature range 45°/55°/60°/70°. It automatically regulates at the set value the temperature of the water returning to the generator.
Technical datasheet
Declaration of Conformity
Technical datasheet
Declaration of Conformity 
132 | Anti-condensation valve with male unions on the 3 ways
Anti-condensation valve with male unions on the 3 ways. Working temperature range 45°/55°/60°/70°. It automatically regulates at the set value the temperature of the water returning to the generator.
Technical datasheet
Declaration of Conformity
Technical datasheet
Declaration of Conformity 
133 | Female anti-condensation valve – Working temperature range 45°/55°/60°/70°
Female anti-condensation valve. Working temperature range 45°/55°/60°/70°. It automatically regulates at the set value the temperature of the water returning to the generator.
Technical datasheet
Declaration of Conformity
Technical datasheet
Declaration of Conformity 
134 | Anti-condensation valve thermometer
7 mm holder diameter, 0-120°C.
Technical datasheet
Technical datasheet
267 | Thermal release valve
Thermal release valve. It prevents overheating in thermal generators, such as biomass-fired boilers. When the temperature of 95°C is reached, the valve opens, enabling hot water in excess to be discharged, and letting cold water flow into the boiler. Opening temperature 95°C, max. capacity: 93 KW - 80000 kcal/h, max. water flow 2000kg/h, cockpit connection 1/2.
Technical datasheet
Declaration of Conformity
Technical datasheet
Declaration of Conformity 
605 | Double safety thermal drain valve
The double safety thermal drain valve prevents heat generators, such as biomass-fired boilers, from the overheating. When the temperature reaches 95°C the valve opens to release excess hot water. Opening temperature 95°C, Max. capacity: 93 KW - 80000 Kcal/h, max. water flow 2000 kg/h, 1/2” cockpit connection, 152 mm cockpit length.
PLEASE NOTE: the double safety consists of 2 thermostatic elements with 2 capillaries. In case of malfunction or accidental break of an element, the other one ensures the opening.
Technical datasheet
Instruction sheet
Declaration of Conformity
Technical datasheet
Instruction sheet
Declaration of Conformity 
606 | Thermic drain valve INAIL
Thermic drain valve. INAIL approved. Manual resetting and optical signal. Temperature setting 95°C, IP40.
TECHNICAL FEATURES
Drainage potentiality:
- 1”1/4 176.750 Kcal/h equal to 7.070 l/h
- 1”1/2 318.200 Kcal/h equal to 12.728 l/h
Declaration of Conformity
Declaration of Conformity 
608 | Thermal drain valve
Thermal drain valve. It prevents heat generators, such as biomass-fired boilers, from the overheating. When the temperature reaches 95°C the valve opens to release excess hot water. Opening temperature 95°C, Max. capacity: 93 KW - 80000 Kcal/h, max. water flow 2000 kg/h, 1/2” cockpit connection.
Technical datasheet
Declaration of Conformity
Technical datasheet
Declaration of Conformity