Any heating appliances, and solid fuel boilers in this case is no exception, should have the tools and mechanisms that provide protection against overheating. For heating appliances using solid fuel, this function is entrusted to the safety valve. The device has a simple and clear structure in which the principle of action of gravitational forces acting on the liquid as a result of the thermostatic effect.
Termosmesitelny safety valve for domestic solid fuel boilers, already one name exactly conveys its main purpose. Several other device names exactly explain the action and scope of the principle. Specialists of Heating device called a three-way thermostatic valve or thermal reset. In each case, we are talking about the same, about the device, to perform safety functions.
The main problem to be solved by a safety valve
Device is a standalone device that is completely independent of external energy sources. If most of the automatic control devices are powered from the mains, in this case, inconspicuous priborchik plays the last protective barrier role solid fuel boilers from overheating. The simplest device is intended to respond to changes in the temperature regime of the boiler water circulating in the heating circuit. If the coolant temperature has reached a critical point (95 degrees or more), actuated safety valve, allowing access to the cold water circuit is overheated.
On a note: In this case, it is a method of protecting the boiler against overheating by mix with the cold water.
The device, for which you have high expectations, must meet the following requirements:
- large carrying capacity;
- High sensitivity of the thermostatic element, located inside the structure;
- compliance with control measurements, declared by the manufacturer.
We have already said that the main function of which is assigned to this device, the protection of heating equipment from overheating. Hence the basic principle of the mechanism of action. By mixing cold and hot water in the heating circuit decreases not only the overall temperature of coolant in the system, but also in the heating unit. Consequently, the mechanism is mounted on the main pipe, creating three different directions of motion of the boiler water.
Termosmesitelnogo valve design and function
As most of the details and structural elements of solid fuel boiler, or a three-way termosmesitelny valve also it has a simple and clear structure. It consists of:
- a main body;
- the spring-loaded rod;
- two valves, poppet type;
- a thermostatic element (head with fixed positions).
Important! Due-cast housing is achieved by the device for leaks, create the conditions necessary for its smooth operation. When installing the equipment must be fitted with all the connections sealing rings that would avoid any leakage of boiler water.
The figure shows a detailed diagram of the mechanism in section, and where it is located as the main elements.
Looking at the design of devices and pipes not understand the principle of action. We consider in detail the processes.
In normal operation the heating system of the main valve, arranged linearly, are in the open position. Insufficient hot water passes freely available from the boiler to the heating circuit.
Thermostatic head, fitted with a sensor sensitive to the fluid temperature is in the standard position. When an emergency situation, for example: from the boiler in the coolant starts flowing, the temperature of which exceeds the preset parameters. Temperature control sensor is triggered, driving the rod. The current mechanism overlaps the main, straight-through passage opening at the same time extending the part through which cold water flows. As a result, different temperature mix water temperature equalization occurs to the established norm. Coolant already normal temperature leaves the apparatus through the pipe to the heating system. Adjusting thermostatic head pressing the device determined by the degree of the bellows with the spreading liquid onto the rod. Respectively determines the sensitivity of the device.
A trigger point adjustment device is determined by the head, configured for a certain temperature.
For reference: The heating circuit is triggered when the coolant enters the relief valve required temperature. By adjusting the degree of heating boiler is already engaged in other devices, determining combustion quality and intensity of thrust.
If water continues to be heated by the action taken, the device overlaps the primary inlet stream, allowing access of cold water from the third nozzle. The rod in this case is in the lowest position. It is already mixed into the main stream water from the third nozzle. When the coolant temperature is varied in the reduction side, under the action of the sensor rod reduces the pressure, opening the access hot water.
In order to achieve proper operation of the entire mechanism is necessary to accurately comply with the requirements for its installation. Three-way valve It can be installed in a right or left hand side in the embodiment, both the return pipe, and the supply circuit. In the operation of the device completely maintenance free.
Installation of safety valve with his own hands
Safety valve installation is mandatory in order to prevent overheating of the solid fuel boiler. Before installation it is necessary to deal with the circuit of the heating appliance and throughout the independent heating system. Knowing the location and purpose of the basic units of the heating system, it will be easier to carry out the installation.
On a note: the main components of the heating system located in the vicinity of the heating unit. The three-way valve is usually included in the so-called security group.
The safety group consists of a pump that supplies the return. buffer tankDue to which the whole system is protected against overheating. Control equipment fixing pressure in the heating boiler, emergency pressure relief valve and automatic air directly mounted on the boiler, at the output, controlling the heating temperature coolant.
For most typical heating systems is the installation of the heat accumulator, the system provides domestic hot water operation, and the buffer tank. Tying in this case is as follows, which is shown in the figure above.
After installing all the elements of security groups can be determined by the place setting of the guard.
The protective device is mounted in strict accordance with the scheme whereby podmes will be hot water from the storage tank with less hot water from the return flow. Get an idea of the type of installation and operation of a defense mechanism, it is possible, delivers video
Device proved to be excellent in cases when it comes to equipment as the main method of home heating, "warm floor" system. The device carries out the adjustment mix with hot water in the heating circuit in case of floor heating its cooling. When installing floor heating need not one, but several devices in accordance with the number of heating circuits. Figure chart shows how the unit looks to connect floor heating pipe system.
Note: to provide heat to a large apartment building, where a large flow of coolant and hot water, heating and hot water supply connects by using gidrostrelki. With the help of the distribution manifold and through each conduit has a certain temperature. Higher temperatures are in indirect heating boiler, there is less hot water in the heating system, which provides a protective flap.
Simple and inconspicuous detail is crucial safety element of the entire heating system, extending the operation of the heating appliance.
