Adjusting the heat supply is an essential component of any heating system. This function is performed by a tee, designed specifically for the redistribution of the coolant, a three-way valve on the heating system. The main distinguishing features of this device are ease of use, functionality and compact size.
Description and purpose
The faucet for the triple-stroke heating system is mounted directly in the heating system to enable regulation of the water temperature. Such devices are used in heating circuits, water supply systems, as well as in hot water supply systems.
The product is equipped with one outlet pipe and a plug with holes, with the help of which the flow of coolant is regulated.
What is the difference between a three-way valve and a two-way valve?
Unlike a two-way valve, the operation of a three-way valve has a completely different principle. The stem in this case does not block the constant flow of the hydraulic mode. It is constantly open and tuned to a specific volume. As a result, consumers receive a certain amount in quantitative and qualitative equivalent. In other words, the valve is not able to block the movement of the regular hydraulic flow circuit. At the same time, it can block the alternating direction, which allows you to control the flow and pressure.
A three-way valve on the heating system was obtained by combining a pair of two-way devices. Only both must necessarily work sequentially - when one is closed, the second begins its work.
Areas of use
Due to its functionality, this device can be found in almost all areas of human activity , in particular, in every house equipped with an individual heating system: a three-way valve for the boiler, for underfloor heating, etc.
In addition, these plumbing devices are installed on the branched circuits of heating systems where periodic redirection of the flow and a change in the state of the environment are required. Also, they can not do without industry.
Three-way valve: principle of operation
In general, the principle of operation of this plumbing device can be described in several sentences. Return and supply piping fit to two tee inlets. The required temperature regime is adjusted using regulatory mechanisms.
At the first pass, the coolant flows as it should. On the way back, it is already cooled, which immediately affects the total temperature of the coolant. For several seconds, the sensor responds to temperature changes and increases the content of hot water in the system. He will open the valve until the water in the heating system reaches an acceptable temperature.
The main advantage that the three-way valve possesses is the principle of operation: this device is autonomous and unpretentious, since it works independently. Only settings and verification of its operability during the installation process are required.
Advantages
- Easy to install.
- Durability.
- Functionality.
- Practicality.
- The ability to control the state of the system through simple steps.
disadvantages
- The three-way valve on the heating system is not designed to work with dirty environments.
- The cost of this device is at a high level.
Mixing type
These plumbing devices have two main subspecies. Each of them performs its function: separation and mixing. In general, one can understand by name what the meaning of their work is.
The mixing type device consists of one output and two inputs. Its main function is to mix the two flows, which is required to reduce the temperature of the coolant. This is achieved by changing the ratio of hot and cold water. This option is indispensable for the installation of a warm floor system and is considered ideal equipment, as it is able to create the required temperature.
The temperature of the outlet stream is quite easily regulated. To get the required temperature at the outlet, you should know what temperature the incoming flows are, and try to calculate the proportions of each as accurately as possible.
If the three-way valve is installed and connected correctly, it can also serve as a flow separator.
Separation type
The dividing type of the three-way valve is intended for separation into two parts of the main stream. For this, the device has two outlet openings and one inlet. This option is required for the distribution of coolant flows into two flows. If you include boilers, convectors in the system, then you can not do without such a valve. The isolating valve operates in a hot water system to separate the liquid. Quite often it is used in piping of air heaters.
Manual and electric three-way valve actuator
According to the control method, three-way cranes are divided into devices equipped with manual and electric drives. The most popular is the manual version. Outwardly, it looks like a classic ball valve, it has three nozzles (outputs).
In private households, it is most often possible to find automatic systems with electrical control of the heat distribution process . For example, you can adjust the temperature for rooms and distribute the coolant depending on the degree of remoteness of the room from the heating equipment (boiler). Can be combined with underfloor heating. Off-road devices are installed on heat pipelines between buildings.
Like any other device, the three-way valve on the heating system is selected depending on the pressure of the coolant and the diameter of the supply pipe. Therefore, it must be used in accordance with GOST. Non-compliance with GOST requirements is a gross violation.
Connection
Before you purchase a three-way valve, it is advisable to familiarize yourself with its characteristics. These include:
- The ability to install a servo (if the crane is installed to work in automatic mode).
- Pipeline throughput .
- The diameter of the pipeline to which the valve is planned to be connected (2-4 cm).
When connecting a three-way valve, it is necessary to take into account the direction of the coolant. On the case of this device there is a mark in the form of an arrow. The valve can be installed both horizontally and vertically. The location of the device will in no way affect the performance of its direct function.
In the process of welding the valve, it is required to ensure the safety of the internal cavities from the ingress of welded soil and scale. At the junction of the valve and the pipeline, the temperature of the coolant must not exceed 100 ° C.
In the heating system, a three-way valve is installed in front of the circulation pump.
Valves must be checked periodically for stability and performance. At the facilities, their maintenance is carried out by the relevant organization in a specific order.
It is important that the device is operated in strict accordance with the instructions.
Selection tips
Before you buy this plumbing equipment, you need to make sure that you understand the scheme of the three-way valve, you figured out its characteristics and decided on the type of design. Also, many pay attention to manufacturers. Indeed, can a manufacturer with a good reputation afford a bad product or a defective product. He is simply not interested in this.
Design features and the valve mechanism do not significantly affect the choice. The choice of a particular metal depends entirely on your preference. Bronze and brass are expensive, but they resist corrosion and are more durable. Steel is cheaper and stronger, but everyone knows the consequences of its interaction with water. Cast iron is characterized by high weight and low cost.
The most important point is the choice of drive type. Manual valves are cheaper, but they have fewer functions. Electrically operated three-way valves are more expensive and can break, but most consumers are delighted with their many functions.