solar hot water/solar heating parts-safety valves

1.Safety valve
Max setting pressure 3-6-7-8 bar
Max opening pressure Pset +15%Pset
Min closing differential Pset -15%Pset
Threading for waterworks ISO 228/1
Manometer connection ISO 228/1

2.Automatic air vent
Max inlet working pressure 10bar
Max temperature (water) 115 degree
Threadings for waterworks ISO 228/1
3.Check Valve
Max setting pressure 10 bar
Inlet pressure 0.02 bar
Max temperature 110 degree
Threading ISO 228/1
4.Magnesium bar
5.Brass fitting