On the highway “boiler-pot” should not be shut-off valves, and narrow areas water. The pipeline is desirable to insulate. Maximum working pressure of the tank must not be less than the amount of pressure on the safety valve and pressure of the valve. It is necessary to take into account the difference in the height of the tank and safety valve.
membrane tank Amtrol Fill Trol
What are the advantages of a closed expansion tank to open?
First, the closed (membrane) tank can be placed next to the boiler, eliminating the need for laying pipes in the attic, where traditionally placed an open expansion tanks.
Secondly, in the membrane tank coolant does not contact with air, hence its use does not lead to the dissolution in the coolant supplemental oxygen, which accelerates the corrosion of heating equipment.
Thirdly, the system with closed fuel tank does not need a regular flow due to the lack of evaporation of the coolant through the open container.
Furthermore, the heating system with a closed expansion tank is permitted to use ice-coolants based on ethylene glycol, cheaper than
Propylene glycol.
The safety valve is triggered continuously, it is necessary to fuel the heating system. Why?
The reasons can be several: first, improper expansion tank, and secondly, a faulty pressure relief valve that needs replacement.
Another possible reason – lack of backwater air in the air cavity of the expansion tank. You should check the air pressure and if necessary, download it through the nipple. Perhaps the expansion tank is not working because of the failure of the membrane. If you click on the air nipple from the coolant outlet, the membrane must be replaced by a serviceable, if her problem demanded – to replace the tank. All work must be performed by specialists.
