Boiler pressure protection

Protect the boiler from high pressure!
Incorrect installation of the heating system or its components can cause inefficient operation of the system, reduce the operating time, and even cause an accident or explosion. Ensure that the heating system is in good working order for your own safety and for the long and efficient operation of the equipment.

What 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 transfer medium in the return direction of the heating main;
• Prevent the system from operating without coolant.

To prevent the risks mentioned above, you should install appropriate additional equipment.

A simple and effective solution for protecting a solid fuel boiler from pressures that exceed the maximum permissible for a given model is to use a diaphragm safety valve.

The principle of operation of the valve is simple - as long as the pressure level of the heat transfer medium is below the trigger point, this valve is closed. As soon as the system pressure rises above the valve actuation point, 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 returns to normal, at which point the valve spring closes again and the coolant circulates in the closed system.

In order to select 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 ½ and ¾ inch outlets 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 you can purchase a valve 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 actuated. Given 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 returns to normal 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 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 the automatic air valve and the pressure gauge are connected in the safety group by means of shut-off valves. This allows the valve or pressure gauge to be replaced or serviced without draining the heating medium from the heating system.
As a rule, a diaphragm safety valve is installed in the safety group, which is set to operate at a pressure higher than 3 bar. When using a safety group with a solid fuel boiler, you should replace the valve with one that is rated for the maximum permissible pressure of your solid fuel boiler-based heating system.

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.

These precautions will extend the service life of your solid fuel boiler, and your home will be warm, safe and cozy.
We wish you warmth! )