Three-way valve for heating with thermostatic control: types and benefits

One of the main pledges of comfort in the house is warm in the cold season, which provides a heating system. Today, hot-water heating system includes not only the battery, and a boiler pipe, but also more subtle but important elements. One of them is shut-off and regulating valves, in particular three-way valve with thermostat for heating. Let's understand why this part of the system is so important and what it is for.

Is responsible for what the three-way valve for heating with thermostat

Valve with temperature control ensures the practicality and effectiveness of the system functioning. Three-way valves for heating intended to regulate the heat flow, which provides indoor comfort and economy of use.

Why regulate heat flow

Before embarking on designing the heating system, made of thermal calculation. Based on the findings selects the appropriate power and type of heating appliances capable of maintaining an optimum temperature in the room.

No account is taken flat area, and then analyze the possible heat loss. Accordingly, the calculated performance of the heating system, necessary for creating a comfortable climate in the room. After that, for all rooms heat balance.

However, these calculations are made under specific conditions, which may change during operation. Factors affecting the radiator work, are different:

• Temperature swings on the streets;
• solar Activity;
• wind power;
• the presence of appliances that generate heat.

As a result, a calculated temperature balance is broken, and the room becomes hot. However, to withdraw from the room of the heat sink or drown out the thermal radiation is impossible. Thus, there is a need to control the generated heat energy devices to maintain a comfortable indoor climate.

Maintain a comfortable temperature by heating the three-way valve

There are two ways to adjust the emitted energy radiator:

1. Qualitative change in the properties of the heat sink.
2. Quantitative control of the heat.

In both cases, the required manipulation of the liquid circulating through the pipes.

Qualitative change in the properties of the heat sink

In order to regulate the atmosphere in the room, the heat generator can be translated to a different mode of operation - whereby the temperature changes of incoming water to the radiators.

Switch mode can be wall-mounted boiler on when it comes to a country house. However, the situation is much more complicated in the case of the boiler room of the city district.

Useful advice!In the case of a city apartment, when you do not have access to the boiler room, is to regulate the energy already allocated coolant.

Quantitative adjustment of the heat flow using the three-way tap with a thermostat for heating

In the event that you can not affect the temperature of the water flowing to the radiator can be controlled by its number. To this end, and need to buy a three-way valves for heating with thermostat. These devices allow to limit the amount of water passing through the radiator, and as a result at the same battery space in the room will receive more or less heat, of course, within the limited capacity system.

The three-way valve to the heating system and temperature controller mounted on the heat sink, may be used alone, but in autonomous heating systems, modern apartments and private houses are often used to enhance the combined method efficiency. Thus, the three-way valve purchase suitable for heating to a temperature controller.

Tensile adjusting the heat flux

It is important to bear in mind that the principle of the three-way mixing valve allows you to raise or lower the temperature of the heat sink only within the established boundaries. These limits are dictated by the specifications of the thermal device, namely, the value of its maximum heat transfer, and depend on each individual radiator.

A device for heating the three-way valve

To understand how the three-way valves operate in the heating system, it is important to understand its structure.

Visually, this device looks like a normal metal tee. As a material for the manufacture of valve commonly used brass, sometimes taken iron or steel. In the instrument housing three nozzle.

However, inside the tee is the mechanism on which is based the principle of operation of three-way valves. It automatically adjusts the heat flows, allowing to maintain a comfortable climate in the room.

The principle of operation of three-way valves in the heating system, depending on the type of actuator

There are two types of actuators that affect the operation of three-way valve in the heating system.

Types of three-way valve actuator:

Type actuator	Principle of operation	Device
Tractor actuators	Equipped with a rod, progressively moving up or down.	Inside the housing is a seat, covered cone which is fixed to the end of the rod.
Rotary actuators	Equipped with a ball or a sector, which is rotated.	The rod does not move vertically, but it scrolls actuator so that movement of the ball with an opening in the ball valves opened or, alternatively, partially overlaps the connection between the nozzles.

Useful advice!For use in the home, you can select the valve from closing working part-sector or with the ball: such models optimal for cases that do not require resistance to extremely high temperatures and high flow ability.

Types of drives three-way valves

During movement of the rod corresponds to an external drive. There are several variants of this part of the system.

Three-way thermostatic mixing valve

According to the principle of the three-way thermostatic valves are divided into:

• direct acting valves;
• indirect action valves.

Most often, this type of valve is used in household installations, and the price of a three-way thermostatic valve lower than that of other types of equipment.

Type active device operates as follows: when the temperature change of the thermal device, expanding fluid "bellows" temperature sensing element, presses against the working portion of the device, stock. There is also a thermal head is a three-way valve, but this element is not present in all devices.

Sensor in such valve can also act positioned inside the pipeline probe.

Three-way valves with electric drive

As an electric drive three-way regulating valves are various electric elements. There are two types:

• Three-way valves for heating electrically as an electric magnet;
• three-way valves with servo based on the electric motor.

The actuator is commanded directly by temperature sensors or from the management controller. Model three-way valve for heating with electric drive are most effective because they allow to ensure the most accurate adjustment of the heat flow.

Useful advice!You can buy a three-way valves for heating without a full drive, and then choose the most suitable option for your purposes adaptations.

Three-way valves are electrically operated: Features and Advantages

Regardless of the stroke position in the three-way valve, circulation is not stopped, so this type of device is not suitable for reducing the coolant flow. This is the main difference between the three-way ball valve with electric drive on the two-way valves, regulators, and other devices.

The operating principle of the three-way valve with electric drive

This valve is designed for mixing or separation of flow distribution. Isolating valve regulates the amount of water, blowing of the fluid to the bypass path, instead of directly. Two devices are used for the nozzle exit, and one - to enter.

The operating principle of the three-way mixing valve with a thermal head based on the admixture of the hot coolant cooler or hotter to cold. As a result, a quality characteristic, namely heat flow temperature varies, the level of this change depends on a fixed ratio connectable jets.

Related article:

Water heating private houses with their own hands, circuit design
How to make hot water heating in the house with his own hands. Drawings designs. The difference between the natural and forced circulation of water.

Two ports for input and one for output can also perform a dividing function. Such valves may be used in various detachably.

Often the actual use of the three-way valve for solid fuel boilers, in the chamber where the condensate falls at the beginning of the furnace. In this case, the valve helps to temporarily cut off the cold water, and the short circuit part to let the heated fluid.

Three-way valves for underfloor heating and other uses

There are several options for using this type of valves:

1. Three-way mixing valves for underfloor heating installed in order to prevent overheating of individual veto system. As a result, water Heated floor heated uniformly, which contributes to comfortable indoor climate as well as security systems.
2. Buying three-way valve for solid fuel boilers can cope with a situation where at the beginning of the furnace falls condensate in the boiler chamber.
3. Three-way valve is installed in heating systems to separate and flow to power the DHW.
4. Three-way bypass device used for strapping the radiators.
5. Valves are optimal for creating a short circuit in the preparation of the return.

Three-way valve for heating with thermostatic control: working principle and purpose

Thermostats set at checkpoints radiator cap. If necessary, these devices entirely or partially overlap the coolant flow. The same function is performed by the crane, however, if the thermostat once you expose the necessary parameters, and then thermostatic valve maintains the preset temperature mode independently. The greatest work of precision and functionality provide the electronic thermostatic valve.

It is important to understand that the thermostat can not change the original heat source power, but allows you to properly dispose of the thermal energy and create a comfortable environment in the room.

Useful advice!In the case of cast iron batteries use temperature control is pointless, since the thermal inertia is too high. As a result, although the price of a three-way valve for heating with temperature control, three-way above the usual price a mixer valve, a temperature regulator substantially improves the usability and performance device.

The operating principle of the thermostat

The temperature controller is a two-way device, consisting of two main parts:

• valve ( "valve");
• The thermal head.

The unit thermostat:

Element	Function	Device	Operating principle
Valve (Valve)	locking device	It consists of a seat, cone and stem.	Operating rod is retracted, reducing the distance between the seat and the cone and thereby reducing the flow. When the distance between those portions of the flow, on the contrary, increased.
Thermal head	stock management	The "bellows" (a cylinder) is closed with a heat-sensitive material.	The principle of operation is based on the expansion of the gas and liquid in the case of heating. Under the influence of hot heat carrier substance in the bellows expands, pushing the spring loaded piston. The impact on the stock with a cone in the strontium seat. By reducing the coolant flow is cooled and, accordingly, reduction in volume of the active substance. The spring returns the piston and rod cone into place, and the flow increases. Repetition of the cycle allowing the radiator to regulate the degree of heating with high accuracy.

Useful advice!The effectiveness of the temperature control based on accuracy and speed of response of the thermostatic head on the installation mode and their change. The faster the reaction, the better the device, and the higher will be the price of a three-way tap.

Varieties thermostats for radiators

Several distinct types of classification of thermostats for the three-way valve.

Classification of thermostats temperature setting method and a temperature control:

type thermostat	Features
mechanical thermostats	Presetting device is performed using the knob with graduations. The stem is driven by a bellows and a return spring.
manual thermostats	The principle of operation is similar to a conventional crane. Such a model can be easily replaced by a controller for automatic operation of the valve under varying conditions.
electronic thermostats	Have a numeric keypad. energy sources are batteries. Take into account the temperature of the coolant. It allows you to program time mode.

Manual and mechanical thermostats can be divided according to the type of the active substance in the bellows. As a thermosensitive substance liquid or gas can be used in the bellows, respectively, temperature controllers are:

• liquid;
• gas.

Also thermostats are separated by appointment. Depending on the characteristics, temperature controllers are designed for:

• for two-pipe systems, wiring;
• for single wiring systems.

According to the connection method of thermostats are:

• angle;
• straight.

Choosing three-way valve: features models of various firms

To select a suitable valve, it is necessary to compare all the features of different models, namely, the executive type mechanism, drive type, presence and type of thermostat, as well as the producer and the price of the three-way valves for heating. It is worth paying attention to models from leading manufacturers.

Three-way valves Esbe: installation instructions and features

The main advantages of the company Esbe models - simple and affordable cost.

Useful advice!If you need to tap adjustment, discard the simple models, the main drawback of which in the absence of the possibility of stabilizing the temperature control on the output.

When installing the valve must be taken into account a number of features:

1. The mixing allows to create an additional circuit in the system, connected to two points of the distribution manifold that ensures uninterrupted circulation of the water outlet.
2. At the inlet flow is provided in case of the need for supplementary heat.
3. Valve with a thermostat attached to the mixing node.
4. To increase the flow of pumping equipment, which is often insufficient due to the narrowness of the valves, converging at one point, it requires the creation of an additional line, which reduces power consumption pump. However, such measures are not relevant for all Esbee models.
5. If needed, a second line will be installed at the balancing of the crane or pump connection to the additional line, which leads to equalization of temperature and input output streams.

Three-way valves Naven: Features and Advantages

Navien company specializes in the production of boilers. Three-way valves of this equipment are designed to change priorities between the hot water for water supply and heating system. These valves are worth buying if there Navien equipment, components and technology because one producer - the key to a long and efficient operation of the system.

Three-way valves Danfoss: Features and Advantages

Danfoss valves are manufactured for use in heating and water supply systems. Among the advantages of this type of equipment:

• stability and accuracy of the adjustment;
• perfect compatibility with other elements of the company Danfoss thermostatic;
• reliability and long service life with no loss of performance;
• ease of installation, maintenance and operation;
• fully automatic operation;
• possibility of installing the pipeline in any position other than the flap side down.

Having carefully considered the technical specifications and tips for choosing the three-way valve for heating systems, you can choose the right device for a particular room and operating conditions.