478
Diaphragm safety relief valve - f/f threads - for solar heating systems

It provides automatic pressure relief protection for hot water and storage tank.
It is equipped with a manually operating lever.
The valve lever must be manually operated at least once a year to insure that water-ways are clear.
Body in nickel-plated brass.
Nominal pressure: 10 bar.
Available setting: 6 bar.
Minimum and maximum working temperatures: -20°C, 160°C.
Opening overpressure: 20%.
Closing differential: 20%.
Threads: ISO228 (equivalent to DIN EN ISO 228 and BS EN ISO 228).