thermostatic elements. Radiator taps Preset programs
In many countries, up to 40% of energy resources are spent on the needs of ventilation and heating of buildings. This is several times more than in advanced European states.
The need to use
The issue of energy conservation is particularly acute, this is relevant against the backdrop of a constant increase in energy prices. One of the devices that allows you to save thermal energy, is a thermostat for radiators, its installation reduces heat consumption by 20%. To do this, the consumer needs to correctly select the design for the heating system, as well as carry out installation, you can find out about this by reading below.
Principle of operation
The Danfoss thermostat is designed to maintain a constant indoor temperature. For the first time such devices began to be used in 1943. The mentioned company is the market leader in the production and sale of such units. Structurally, the devices have 2 main elements, namely a thermal head and a valve, which are connected by a locking mechanism. The purpose of the thermal head is to determine the temperature environment, to regulate the effect on the actuator, the valve acts as the latter. It is designed to cover the flow of water that enters the radiator. This method of regulation is called quantitative, since the device can affect the flow of water that passes into the battery. There is another method, which is called qualitative, with its help the water temperature changes in the system. This is done through namely This element must be located in or in the boiler room. The Danfoss thermostat has a bellows inside which is filled with a temperature sensitive medium. It can be gas or liquid. Last variety bellows are easier to manufacture, but do not show such speed as gas counterparts, which is why the latter have become so widespread. At the moment the air temperature level rises, the substance that is in the enclosed space acquires a more impressive volume, the bellows, stretching, has an effect on the valve stem. The latter is moved down the cone, which is designed to reduce the flow area. This effectively reduces water consumption. As the temperature drops, this process takes place in reverse order, and the volume of the coolant increases to the optimum limit, and the Danfoss thermostat works.
Consumer reviews
Depending on what type of heating system is used, as well as what installation technology, thermal heads and valves can be used to control the flow of water. different combinations. If we are talking about a one-pipe system, then a valve should be used, which is characterized by increased throughput and negligible. According to users, the same recommendation can be used in the case of a two-pipe gravity system, where water circulates naturally and is not affected by forced impulse. If you decide to choose a Danfoss thermostat, you can also install it on a two-pipe system, which is equipped with circulation pump. At the same time, according to reviews, the valve should have the ability to adjust the throughput. It is quite simple, and there is no need to use a special tool for this. After you have decided which valve to use, you should decide on the type of thermal head.
If you are interested in Danfoss - a thermostat, the installation instructions for which will be presented below, you can purchase it at an affordable cost. When determining the type of thermal head, you should be aware that it is offered for sale in some varieties. Thus, a thermoelement can be inside. Among other things, it can be portable. Sometimes the regulator is external. Devices are also programmable, in which case they are electronic. You can also choose an anti-vandal thermal head. According to users who have chosen a regulator with an internal sensor, this device should only be installed if it is possible to position it horizontally. Then the air in the room will freely flow to the body of the device.
For reference
After you have purchased a Danfoss radiator thermostat, you should familiarize yourself with the features of its installation in more detail. Thus, it is completely unacceptable to mount it on a radiator in vertical position. In this case, the heat flow will constantly rise upwards, and the elevated temperatures from the supply pipeline and the housing will affect the bellows. Ultimately, you will encounter the fact that the device will not work correctly.
Customer reviews on choosing a thermostat
Home craftsmen especially emphasize that in some cases it is not possible to install the device horizontally. Then it is recommended to buy a remote one that comes with a capillary tube. The length of the device is 2 meters. At this distance from the battery, it is recommended to place the device by mounting it on the wall. Buyers emphasize that the lack of the possibility of installing the regulator horizontally does not always indicate the need to purchase a remote sensor. There may be other objective reasons for this. The Danfoss thermostat, the principle of operation of which was described above, cannot be installed behind thick curtains in any way, in this case, of course, best solution will be the acquisition of a remote sensor. Among other things, such a need arises when a heat source is located next to the thermal head or hot water pipes pass. You can resort to this solution, and when the radiator is under enough wide window sill. In this case, the thermoelement may enter the draft zone. Buyers claim that if at least one of the above conditions is met, then it is best to purchase a remote sensor.
Installation instructions
The Danfoss thermostat, reviews of which are presented in the article, must be installed according to a certain technology. The first recommendation is the exclusion of mounting the thermal head on the heater within sight. Batteries whose total capacity is 50 percent or more of all that are in the same room should be regulated. Thus, when there are two heaters in the room, the thermostat should be on one battery, whose power is more impressive. If you are interested in Danfoss - a thermostat, the setting of which is quite simple, you can purchase and install it. The first part of the device, which is the valve, should be installed on the supply pipeline. If it needs to be embedded in already assembled system, the supply line must be dismantled. These works may involve some difficulties if the connection is made using steel pipes. The master will have to stock up on a tool for cutting the material.
Conclusion
A fairly popular company today in the market for relevant products is Danfoss. The thermostat (how to adjust it is indicated in the instructions) must be installed on the radiator. The thermal head is then mounted without using additional tool. It is very easy to do at home, in addition, it will save on the purchase of consumables.
The heating system is one of the most important details any home. Unfortunately, it is on it that the greatest costs are spent during the payment of utility bills, and regardless of the installed autonomous or centralized heating.
Get comfortable temperature and significantly reduce the cost of paying bills for consumed heat energy help thermostats installed on each radiator battery.
A special effect can be obtained by installing temperature controllers for Danfoss radiators, capable of maintaining the required temperature in the room with an accuracy of 1 degree.
Principle of operation and design
Danfoss thermostats are essential for maintaining room temperature. In the process of operation, the thermostats monitor the change in temperature in the room, using built-in heat sensors. When the temperature drops, the thermal control system opens the coolant intake, increasing its volume and circulation inside the battery.After reaching the set temperature, the Danfoss thermostat reduces the supply of heat carrier, thereby reducing the heating temperature and energy consumption in the heater.
The equipment consists of two main components:
- The thermostatic element responsible for controlling the device.
- Valves regulating the return of coolant to the radiator. Performing element.
The temperature control system can be mechanical or electronic. Danfoss electronic thermostats for heating radiators are equipped with a small display to show information about the entered program.
Differences of some models
Depending on the model, the installed thermostats can be divided according to the principle of operation and design features.- Supported temperature ranges from 5 to 30℃.
- Temperature measurement sensor option - it can be built-in, remotely controlled and programmable.
- They differ in the type of installation - angular, straight, for the lower or upper type of connection.
The most popular are direct heat regulators for the Danfoss battery, their design allows you to connect batteries with bottom, top and side connections. The only thing to consider is the length of the shut-off valve and select the length of the installation pipes accordingly. The possibility of implementing any type of connection is carried out thanks to the rod located along the axis of the shank. The model designation for such equipment is RTD-N UK. The wide range of mounting options for the UK model makes it possible to use them in conjunction with Danfoss floor convectors.
Corner temperature controllers are mounted directly on the coolant intake point by the radiator and require a minimum of additional installation work do not take up extra space. Sensors such as RTD - N or RTD - G are marked, depending on the model. The increased throughput makes it possible to use the thermal valve in closed and open heating systems.
Another type temperature controllers for radiators Danfoss is a variant built into the radiator. Such equipment is widely used in compact devices located in niches close to the side surfaces. Often, built-in valves are equipped with remote thermostats.
Installing and configuring the sensor
Installing automatic thermostats for Danfoss radiators, follow the instructions carefully. It is not recommended to place the regulator head behind bulky objects, behind curtains or inside niches. This will result in skewed readings by obstructing the even flow of air around the sensor.If the installation of a thermal head for Danfoss RTD 3640 radiators or other similar models is not possible due to the hidden placement of the battery, an external remote sensor must be taken care of.
Despite the possibility of installing thermostats in almost any heating system, their use with cast-iron batteries will not bring the expected results due to slow cooling and slow heating of the battery.
The installation of the thermostat should only be carried out by professionals, in order to avoid further problems and malfunctions.
The temperature controllers for Danfoss radiators are set up once, at the beginning of each heating season. For correct setting it is necessary to minimize the heat loss of the room, for which windows and doors are closed. Then a conventional room thermometer is installed in the center and the shut-off valve of the thermostat opens as much as possible.
After the temperature in the room begins to slightly exceed the one that you consider most comfortable for yourself, the valve must be completely closed. In the process of gradual cooling of the air, the temperature will begin to decrease, and as soon as it reaches the indicators you need, the thermostat can be gradually opened until the coolant is supplied to the system. Usually you just hear how water or other liquid coolant begins to circulate inside the radiator.
For sensors equipped with electronic adjustment, simply select the desired heating temperature and fix it in the program. If necessary, the temperature can be easily changed directly during operation.
After the end of the heating season, Danfoss radiator temperature controllers are recommended to be left at the maximum open position, to circulate inside the valve and reduce the possibility of clogging.
The main task of any heating system is to provide a comfortable air temperature in the room. This temperature may be different depending on the purpose of the room, but if the prerequisite is its invariability during the day, then the thermostat becomes indispensable constructive element heating device.
The Danfoss radiator thermostat consists of two parts: a valve and thermostatic element(thermal heads). Inside the thermostatic element is a thin sealed cylinder - a bellows filled with a liquid or gaseous thermosensitive working substance. When the temperature rises, the bellows expands and moves the rod associated with it, which presses on the stem in the valve, and the valve reduces the flow of coolant to the radiator. When the temperature is lowered, the process is reversed. Thus, the thermal head is a control mechanism, and the valve is an executive one.
Manufacturer: Danfoss (Denmark).
Danfoss Radiator Valves
Radiator thermostat valves are divided into:
- valves for a two-pipe pump heating system (type RA-N) of increased resistance with a device for mounting adjustment of their throughput to perform hydraulic balancing of the pipeline system;
- high-capacity valves type RA-G for pumping one-pipe or two-pipe gravitational heating system.
Danfoss valve bodies are made of brass. The connection provides a simple and precise attachment of the thermostatic element to the control valve. To identify RA-N valves, their protective caps are colored red, while RA-G valves are gray.
Thermostat valves Danfoss RA-G
| RA-G 15 | Valve thermostat RA-G 15 for a one-pipe or two-pipe system, according to the type of connection - straight or angled, connection size- 1/2 inch (DN 15). | 1 930 rub. |
| RA-G 20 | Thermoregulator valve RA-G 20 for one-pipe or two-pipe system, according to the type of connection - straight or angled, connection size - 3/4 inch (DN 20). | 2 460 rub. |
| RA-G 25 | Thermoregulator valve RA-G 25 for one-pipe or two-pipe system, according to the type of connection - straight or angled, connection size - 1 inch (DN 25). | 3 100 rub. |
Thermostat valves Danfoss RA-N
| RA-N 15 | Thermoregulator valve RA-N 15 for a two-pipe system, according to the type of connection - straight or angled, connecting size - 1/2 inch (DN 15). | 1 600 rub. |
| RA-N 20 | Thermoregulator valve RA-N 20 for a two-pipe system, according to the type of connection - straight or angled, connecting size - 3/4 inch (DN 20). | 2 000 rub. |
| RA-N 25 | Thermoregulator valve RA-N 25 for a two-pipe system, according to the type of connection - straight or angled, connecting size - 1 inch (DN 25). | 3 600 rub. |
The RA series can be combined with the RA-G and RA-N series valves.
Thermostatic element and radiator valve
Thermostat kit Danfoss equipment consists of a radiator valve RA-G (for one-pipe or two-pipe heating systems) or RA-N (for two-pipe heating systems) and a thermostatic element RA.
The kit is designed for automatic control of the air temperature in the room.
Easy to install on Various types heating devices in apartments with a centralized one-pipe and two-pipe heating system.
| RA 2994/RA-G 15 straight Article 013G2164B Direct thermostatic valve RA-G 15 for one-pipe or two-pipe system, thermostat RA 2994. | 2 990 rub. |
| RA 2994/RA-G 15 angled Article 013G2163B Angle thermostatic valve RA-G 15 for one-pipe or two-pipe systems, thermostat RA 2994. | 2 990 rub. |
| RA 2940/RA-G 15 straight Article 013G2144 Direct thermostatic valve RA-G 15 for one-pipe or two-pipe system, thermostat RA 2940. | 3 200 rub. |
| RA 2940/RA-G 15 angled Article 013G2143 Angle thermostatic valve RA-G 15 for one-pipe or two-pipe systems, thermostat RA 2940. | 3 200 rub. |
| RA 2994/RA-G 20 straight Article 013G2166B Direct thermostatic valve RA-G 20 for one-pipe or two-pipe system, thermostat RA 2994. | 3 390 rub. |
| RA 2994/RA-G 20 angled Article 013G2165B Angle thermostatic valve RA-G 20 for one-pipe or two-pipe systems, thermostat RA 2994. | 3 390 rub. |
| RA 2940/RA-G 20 straight Article 013G2146 Direct thermostatic valve RA-G 20 for one-pipe or two-pipe systems, thermostat RA 2940. | 3 690 rub. |
| RA 2940/RA-G 20 angled Article 013G2145 Angle thermostatic valve RA-G 20 for one-pipe or two-pipe systems, thermostat RA 2940. | 3 690 rub. |
| RA 2940/RA-N 15 straight Article 013G2154 Direct thermostatic valve RA-N 15 for two-pipe system, thermostat RA 2940. | 2 900 rub. |
| RA 2940/RA-N 15 angled Article 013G2153 Angle thermostatic valve RA-N 15 for two-pipe system, thermostat RA 2940. | 2 900 rub. |
| RA 2940/RA-N 20 straight Article 013G2156 Direct thermostatic valve RA-N 20 for two-pipe system, thermostat RA 2940. | 3 290 rub. |
| RA 2940/RA-N 20 angled Article 013G2155 Angle thermostatic valve RA-N 20 for two-pipe system, thermostat RA 2940. | 3 290 rub. |
Danfoss thermostatic elements
Thermostatic elements (thermoheads) Danfoss are automatic temperature control devices designed to complete radiator thermostats.
The temperature controller, equipped with a thermostatic element, maintains a constant temperature in the room at the desired level within the range from +5°С to +26°С with an accuracy of ±1°С.
It should be remembered that most thermostats are governing fittings, but not shut-off(except for RA2940 and RAW 5110 thermostats), therefore, if it is necessary to dismantle the radiator, the thermal head should be replaced with a bronze locking handle, which will ensure complete blocking of the coolant flow.
Danfoss thermostatic elements
 | RA 2994 | Thermostatic element with gas-filled temperature sensor. Temperature adjustment range: from +5°С to +26°С. | 1 440 rub. |
 | RA 2992 | Thermostatic element with gas-filled remote temperature sensor. Temperature adjustment range: from +5°С to +26°С. Capillary tube length: 2 m. | 2 200 rub. |
 | RA 2920 | Thermostatic element with gas-filled temperature sensor and tamper protection. Temperature adjustment range: from +5°С to +26°С. | 2 190 rub. |
 | RA 2940 | Thermostatic element with gas-filled temperature sensor. Temperature adjustment range: from +0°С to +26°С. Possibility of blocking the supply of coolant. | 1 600 rub. |
 | RAW 5010 | Thermostatic element with liquid temperature sensor. Temperature adjustment range: from +8°С to +28°С. | 1 390 rub. |
 | RAW-K | Thermostatic element with liquid temperature sensor. Temperature adjustment range: from +8°С to +28°С. For installation on built-in valves (M30x1.5) of radiators with bottom connection - Rifar, Copa, Kermi, Demrad, Stelrad, Purmo, Korado. | 1 390 rub. |
 | thermostatic element remote control with liquid temperature sensor. Temperature adjustment range: from +8°С to +28°С. Capillary tube length: 2 m (RA 5062), 5 m (RA 5065). | 4 590 rub. 4 960 rub. |
When installing thermostats, it should be remembered that the effect of their use will be noticeable if they control radiators with low thermal inertia. In practice, these are all known types of modern radiators, except for cast iron ones. The latter, due to the large mass of cast iron and water, will heat up and cool down very slowly, nullifying the effect of regulation.
Shut-off valves RLV are designed for lateral connection to the radiator of pipelines of a two-pipe heating system. Are issued in direct and angular execution.
P y \u003d 10 bar *; T max =120°C; ΔP max =0.6 bar.
* Nominal pressure. See GOST 356-80 Fittings and details of pipelines. Pressure conditional, trial and working.
LLC "Promarmatura XXI century" offers the widest range of Danfoss products
The range of products includes: | | | | | | |
Danfoss is the world's largest manufacturer of radiator thermostats. Over the years, Danfoss has sold over 300 million radiator thermostats worldwide, saving a million liters of fuel every day and preventing tons of damage to the environment. carbon dioxide, sulfur compounds and other harmful substances. Radiator thermostats pay for themselves in less than two years, and with a typical lifespan of more than 20 years, they are a great opportunity to save money and energy.
Danfoss radiator thermostats are manufactured with built-in and remote sensors to ensure optimum performance; plus wide range valves and additional equipment constitute the widest range our products.
Thermostatic elements of the RA 2000 series
Thermostatic elements of the RA 2000 series are automatic temperature control devices intended for completing RA type radiator thermostats. The radiator thermostat is a proportional air temperature controller direct action with a small proportional band, which are currently equipped with building heating systems for various purposes. The RA thermostat consists of two parts:
All thermostatic elements can be combined with any type RA control valves. The clip connection provides a simple and precise fastening of the thermocouple on the valve. Protective cover thermocouples RA 2920 and RA 2922 prevents their unauthorized dismantling and reconfiguration by unauthorized persons. Specifications Radiator temperature controllers of the RA type comply with European standards EN 215–1 and Russian GOST 30815–2002.
Technical data for thermostatic elements of the RA 2000 series
The main device of the thermostatic element is the bellows, which provides proportional control. The thermocouple sensor senses changes in ambient temperature. The bellows and the sensor are filled with a volatile liquid and its vapours. The adjusted pressure in the bellows corresponds to the temperature of its charging. This pressure is balanced by the compression force of the tuning spring. As the air temperature around the sensor rises, some of the liquid evaporates and the vapor pressure in the bellows rises. At the same time, the bellows increases in volume, moving the valve spool towards closing the hole for the coolant flow in heater until a balance is reached between the spring force and the vapor pressure. When the air temperature drops, the vapors condense, and the pressure in the bellows drops, which leads to a decrease in its volume and the movement of the valve spool towards the opening to a position at which the equilibrium of the system is again established. The vapor charge will always condense in the coldest part of the sensor, usually the furthest from the valve body. Therefore, the radiator thermostat will always respond to changes room temperature without feeling the temperature of the coolant in the supply pipeline. However, when the air around the valve is still heated by the heat given off by the pipeline, the sensor may register more than high temperature than indoors. Therefore, to exclude such influence, it is recommended to install thermostatic elements, as a rule, in a horizontal position. Otherwise, it is necessary to use thermocouples with a remote sensor.
Selecting the type of thermostatic element
Thermostatic elements with built-in sensor
When choosing a thermostatic element, one should be guided by the rule: the sensor must always respond to the air temperature in the room.
Thermostatic elements with an integrated sensor must always be positioned horizontally so that ambient air can circulate freely around the sensor. They should not be installed in a vertical position, as the thermal effect on the sensor from the valve body and the heating pipe will cause the thermostat to malfunction.
Thermostatic elements with remote sensor
Thermostatic elements with a remote sensor should be used if: o thermoelements are covered with a blind curtain; o the heat flow from the pipelines of the heating system affects the built-in temperature sensor; o the thermoelement is located in the draft zone; o Required vertical installation thermoelement. The remote sensor of the thermostatic element must be installed on a wall free from furniture and curtains or on a plinth under the heater, if there are no pipelines of the heating system. When mounting the sensor, the capillary tube should be pulled out to the required length (maximum 2 m) and fixed to the wall using the supplied brackets or a special gun.
Thermostatic elements of the RAW series
Thermostatic elements of the RAW series are automatic temperature control devices designed to complete RA type radiator thermostats. The radiator temperature controller is a direct-acting proportional air temperature controller with a small proportional band, which is currently used in heating systems of buildings for various purposes. The thermostat type RA consists of two parts: a universal thermostatic element of the RAW series and a control valve with a pre-set flow rate RA-N (for two-pipe heating systems) or RA-G (for a one-pipe system).
The RAW series thermostatic elements production program includes:
Thermostatic elements of the RAW series are equipped with devices for protecting the system from freezing, fixing and limiting the temperature setting. The RAW 5012 is equipped with a 2 m ultra-thin capillary tube that is coiled inside the sensor housing and connects the remote sensor to the thermostatic element. During installation, the pipe is pulled to the required length. The clip connection provides a simple and precise fastening of the thermocouple on the valve.
The technical characteristics of radiator temperature controllers with thermoelements of the RAW series comply with European standards EN 215-1 and Russian GOST 30815-2002.
In order to prevent unauthorized dismantling, the thermocouple can be fixed to the valve using a special retainer (see Accessories).
Specifications of RAW thermostatic elements
The main device of the thermostatic element is the bellows, which provides proportional control. The thermocouple sensor senses changes in ambient temperature. The bellows and sensor are filled with a special temperature-sensitive fluid. The adjusted pressure in the bellows corresponds to the temperature of its charging. This pressure is balanced by the compression force of the tuning spring. As the temperature of the air around the sensor rises, the liquid expands and the pressure in the bellows increases. At the same time, the bellows increases in volume, moving the valve spool towards closing the hole for the coolant flow into the heater until a balance is reached between the spring force and the liquid pressure. When the air temperature drops, the liquid begins to compress, and the pressure in the bellows drops, which leads to a decrease in its volume and the movement of the valve spool towards the opening to a position at which the equilibrium of the system is again established. To eliminate the influence warm air It is recommended to install thermostatic elements from the heating socket of the heater, as a rule, in a horizontal position. Otherwise, it is necessary to use thermocouples with a remote sensor.
Thermostatic elements series RAW-K
Thermostatic elements of the RAW-K series are automatic temperature controllers with a small proportional band. RAW-K are intended for installation on thermostatic valves manufactured by Heimeier, Oventrop or MNG, built into steel panel radiators such as Biasi, Delta, DiaNorm, Diatherm, Ferroli, Henrad, Kaimann, Kermi, Korado, Purmo, Radson, Superia, Stelrad, Veha, Zehnder-Completto Fix. The thermostatic element of the RAW-K series has a liquid sensor with a temperature setting range of 8-28 °C and is equipped with a frost protection device for the heating system.
Danfoss produces 3 modifications of RAW-K series thermocouples:
The RAW-K 5032 is equipped with a 2 m long ultra-thin capillary tube, which is coiled inside the remote sensor housing, connecting it to the operating bellows of the thermostatic element. During installation, the tube is pulled to the required length. Thermostatic elements of the RAW-K series comply with European standards EN 215-1 and Russian GOST 30815-2002.
Electronic radiator thermostat Living eco
The Living eco® electronic radiator thermostat is a programmable microprocessor controller for maintaining the desired air temperature, mainly in residential buildings served by a water heating system. The thermostat is designed to be installed on the valves of radiator thermostats instead of traditional thermostatic elements.
Living eco® has programs P0, P1 and P2 that allow you to control the room temperature at different times of the day.
The P0 program maintains a constant air temperature throughout the day. Programs P1 and P2 can reduce the room temperature at certain times in order to save energy, allowing the heating system to adapt to the lifestyle of the people living in it.
The Living eco® thermostat is supplied with adapters to mount it on the valves thermostats Danfoss as well as most other manufacturers. The Living eco® thermostat is easy to install and set up, with only three buttons on the panel.
The Living eco® thermostat is equipped with an open window function that cuts off the supply of coolant to the heater in case of a sharp decrease in the air temperature in the room, which reduces heat loss, thereby increasing the efficiency of the heating system.
The main characteristics of the thermostat:
Preinstalled Programs
The "long absence" function allows you to lower the temperature in the room when it is not in use. The period of absence and the temperature are set arbitrarily by the consumer.
The choice of programs and their adjustment are made in accordance with the instruction attached to the thermoelement.
Thermoelectric actuators TWA series
Thermoelectric mini-actuators of the TWA series are designed for on-off control of various control valves in heating and heat-cold supply systems of local ventilation installations.
The actuator is equipped with a visual travel indicator that shows whether the valve is in closed or open position.
TWA actuators, depending on the modification, can be used with Danfoss RA, RAV8 and VMT series valves, as well as Heimeier, MNG and Oventrop valves with M 30 x 1.5 actuator threads. If the actuator is used with other types of valves, the valve must be checked for geometry compatibility and to ensure that it closes. The supply voltage of the electric actuator is 24 or 230 V. The valves can be normally closed in the absence of voltage (NC) and normally open (NO). In addition, the 24 V normally closed actuator is supplied with a limit switch (NC/S).
Thermostat valves with presetting RA-N and RA-NCX DN = 15 mm (chrome plated)
Control valves RA-N and RA-NCX are designed for use in two-pipe pumped water heating systems.
RA-N is equipped with a built-in device for preliminary (installation) adjustment of its bandwidth within the following ranges:
The RA-N and RA-NCX valves can be combined with all thermostatic elements of the RA, RAW and RAX series as well as with the thermoelectric actuator TWA-A.
To identify the RA-N and RA-NCX valves, their protective caps are colored red. The protective cap must not be used to block the flow of heat transfer fluid through the heater. Therefore, the handle (code no. 013G3300) must be used.
The valve bodies are made of nickel plated pure brass (RA-N) or chrome plated (RA-NCX).
The technical characteristics of the RA-N and RA-NCX valves in combination with the thermostatic elements of the RA, RAW and RAX series comply with European standards EN 215-1 and Russian GOST 30815-2002, and the size of the connecting thread - with HD 1215 (BS 6284 1984). All Danfoss radiator thermostats are manufactured in ISO 9000 (BS 5750) certified factories.
To prevent deposits and corrosion, the RA-N and RA-NCX thermostatic valves should be used in water heating systems where the coolant meets the requirements of the Rules technical operation power stations and networks Russian Federation. Otherwise, please contact Danfoss. It is not recommended to use formulations containing petroleum products (mineral oils) to lubricate valve parts.
Adjustment to the calculated value is made easily and accurately without the use of special tools. To do this, perform the following operations:
Presetting can be done in the range "1" to "7" in 0.5 intervals. In the "N" position, the valve is fully open. Installation on the dark area of the scale should be avoided.
When the thermostatic element is mounted, the presetting is hidden and thus protected from unauthorized changes.
Preset thermostatic valve RA-N with press fitting
The RA-N valve is designed for use in two-pipe water heating pump systems with copper or of stainless steel. Special crimping tools are required to connect the valve nipple to the pipeline. valve body according to appearance and technical specifications identical to standard valves RA-N DN = 15 mm. RA-N can be used with all types of thermostatic elements of the RA or RAW series, as well as with special design thermostatic elements type RAX and thermoelectric actuator TWA-A.
The RA-N control valve is equipped with a built-in device for preliminary (mounting) adjustment of its capacity Kv in the range from 0.04 to 0.73 m3/h.
To identify the valves, the protective cap is colored red. The cap must not be used to cover the controlled medium. For this purpose, a special metal handle (code no. 013G3300) should be used. The valve body is made of DZR nickel-plated brass and the push pin is made of stainless steel. The pin does not require lubrication during the life of the valve. The gland packing can be replaced without emptying the piping system. RA-N should be used in water heating systems where the coolant meets the requirements of the Rules for the technical operation of power plants and networks of the Russian Federation. Otherwise, please contact Danfoss. It is not recommended to use formulations containing petroleum products (mineral oils) to lubricate valve parts.
High flow thermostatic valve RA-G
Thermoregulatory valve with increased throughput RA-G is intended for use, as a rule, in single-pipe water heating systems with pump circulation of the heat carrier that meets the requirements of the Rules for the technical operation of power plants and heat networks of the Russian Federation. The valve is not recommended for use if mineral oil impurities are present in the coolant.
RA-G is equipped with an oil seal that can be replaced without draining the heating system. The pressure pin in the gland is made of chrome steel and does not require lubrication during the life of the valve. All versions of RA-G valves can be combined with any thermostatic elements of the RA series.
RA-G valves are supplied with gray (for their identification) protective caps, which must not be used to shut off the heating medium flow. Therefore, a special metal service locking handle (code no. 013G3300) must be used.
Set of thermostatic fittings X-traTM for heated towel rails and design radiators.
The X-tra™ thermostatic kit is specially designed for heated towel rails. It consists of a thermostatic valve, thermostatic element and shut-off valve with drain function. The innovative self-sealing connection of the valves to the radiator is made with a 1/2 inch thread. Valves and thermocouple are available in white, chrome and steel versions and fit most towel warmers. This kit is the perfect ending to the heated towel rail. Attractive and compact design allows you to install the thermostat under the heated towel rail parallel to the wall, eliminating accidental hits on it.
The range includes two types of thermostats with various principles regulation:
- RAX, which regulates the air temperature in the room;
- RTX, which detects and regulates the temperature of the water leaving the heated towel rail. Used on towel warmers and adjusted 5-10°C above room temperature, the RTX thermostat provides a constant temperature for drying towels.
The valve assembly is a body with a double-sided self-sealing fitting, which has two sealing rings: one for sealing the connection of the fitting with the heated towel rail, the second for sealing the connection of the fitting with the valve body. The hexagon socket screw is used to seal the connection between the valve body and the fitting. If the O-rings do not fit the fittings on the heated towel rail, a traditional sealing material is used.
