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Protect the boiler from high coolant pressure!
Incorrect installation of the heating system or its elements can cause inefficient operation of the system, reduce the operating time, and even provoke an accident or explosion. Take care of the proper operation of the heating system in time for your own safety and long and efficient operation of the equipment.

What exactly should you pay special attention to in order to keep yourself warm for a long time and safely with a solid fuel boiler?

• Protection against high coolant pressure;
Protection against low temperature of the heat carrier in the opposite direction of the heating main;Prevention of system operation without coolant.

To prevent the above risks, appropriate additional equipment should be installed.

A simple and effective solution for protecting a solid fuel boiler from the pressure that is maximum permissible for this model is the use of a diaphragm safety valve.

The principle of operation of the valve is simple - while the pressure level of the coolant is below the trigger point, this valve is in the closed state. As soon as the system pressure rises above the valve actuation level, the valve spring is displaced by this pressure, the system is depressurized and excess heat transfer fluid flows out of the system. This continues until the pressure normalizes, then the valve spring closes again and the coolant circulates in the closed system.

In order to choose the right diaphragm safety valve, you should consider the power of your solid fuel boiler. As a rule, for boilers with a capacity of up to 50 kW, a valve with outlets of ½ and ¾ inches is installed. For more powerful systems, the valve should be selected individually. In the valve settings, as a rule, the working pressure can be adjusted or a valve can be purchased that is already set to open at a certain pressure.

It is worth noting a small drawback that can be encountered after the valve is triggered. Due to the fact that the coolant is not always clean and may contain dirt and sludge, dirt particles can prevent the spring from completely closing the valve when the pressure normalizes and the coolant will continue to drip. To solve the problem, it is necessary to clean the valve by manual opening. To do this, turn the handle and flush the valve with a flow of coolant.

The most popular solution to the problem of overpressure is the installation of boiler safety group devices. This is a device that includes the main safety elements: a diaphragm safety valve, an automatic air valve and a pressure gauge. The safety group is used more often, because all the necessary elements are already mounted on a single manifold and only one threaded connection is required for its installation.
It is important that in the safety group the automatic air valve and the pressure gauge are connected using cut-off valves. This makes it possible to replace or maintain the valve or pressure gauge without draining the heating medium from the heating system. When using the safety group with a solid fuel boiler, it is worth replacing the valve with one whose rating corresponds to the maximum allowable pressure of your heating system based on a solid fuel boiler.

For safety reasons, we recommend duplicating the installation of a diaphragm safety valve in your heating system: one on the boiler and one on the heating medium supply pipe.