Regulatory valves of radiator thermostators RA are divided into two types: RA-N. (for two-pipe heating pumping systems) and RA-G. (For single-tube pumping and two-pipe gravitational systems) 1). Clap RA-N is an increased hydraulic resistance valve with a preliminary installation setting of its limit bandwidth. Valves are released with a conditional diameter of 10 to 25 mm, straight and angular, nickel-plated. In the Nomenclature of the company "Danfoss" there is a modification of the valve DR \u003d 15 mM Ra-NCX with a chromed housing, which is usually used in conjunction with the thermoelements of RAX in a chrome-plated or color version. Ra-NCX valves are used in rare cases, and Ra-N valves \u003d 10 and 25 mm do not find practical applications in Russia at all, so they are not presented in this manual. The angular horizontal and three-axis valves are used when it is necessary to apply a thermostatic element with a built-in sensor and pipelines, bringing the heat carrier to the heating device, are deposited from below. In the Nomenclature of the Danfoss company, there is also KLA-Pan Ra-N DN \u003d 15 mm with a pipe for a press compound with a copper tube Ø15x1 mm, which is used in horizontal consuming heating systems .Technical information on valves Ra-n DN \u003d 10 and 25 mm , RA-NCX and RA-N DN \u003d 15 mm for the press compound is presented in the VD.53.p17.50 catalog "Radiator thermal regulators and pipe fittings for water heating systems." RA-N-ns are supplied with a red protective cap.

The main advantage of the valve Danfoss type RA-N is the convenience and accuracy of the setting to the desired hydraulic resistance (bandwidth). In the valves manufactured by other manufacturers, the setting implies the number of revolutions of the special tool from the "closed" position. In this case, it is impossible to determine the value of the setting visually without disturbing the existing position of the device. It will not be accurate either, since it is unclear how many revolutions, for example 3 or 3 ¼. The presence of a special tool complicates the setup work. Externally, single-clay valves of various companies have different fixed settings. When installing, builders are often confused and can not establish a heating system. Some companies propose to make the setting not on the thermoelae, but on the shut-off valve, changing the number of revolutions of its rod. It is inconvenient, as it leads to the rise in the cost of work and reduce the accuracy of the setting.

The preset device is a throttle cylinder associated with a rotary crown. Different positions of the crown and cylinder correspond to certain valve bandwidth values \u200b\u200bof the thermostat. The crown indicates the digital indexes of the positions of the configuration element. Configuration indexes should be determined during the hydraulic calculation of the heating system and are set against drilling on the valve body when performing installation and commissioning. Setup is made without the use of any tool. The configuration device is hidden under the thermostatic element and when it is blocking it is not available for random reconfiguration. In case of possible clogging of the valve at small preset values, it suffices to rotate the setting crown to the position "n" (fully open), and the valve is washed with water. After that, the setting is returned to the initial position. The pre-configuration is clearly visible on the crown (easy to configure or control the correctness of the adjustment). Each valve has 14 fixed configuration values \u200b\u200b(settings from 1 to 7, N and six intermediate positions).

RA-G is a low hydraulic valve without a device to limit its passability. Valves are manufactured with a conditional diameter of 15 to 25 mm with a nickel-plated case. They also come straight and corner. The allowances are not presented with RA-G per \u003d 25 mm valve, as practical applications are not found in Russia. Technical information on them represented by the catalog VD.53.p17.50 "Radiator thermostators and pipe-wire fittings for water heating systems". RA-G valves are supplied with a gray protective cap. Ra-n and Ra-G valves are joined by heating devices using threaded shanks with a cape nut, and with a pipeline - through a coupling fitting. If necessary, in heating systems, a special version of Ra-N valves can be used with an outer connecting thread or with a press compound with a copper tube Ø15x1 mm. Many Russian factories produce heating devices with built-in valves of Danfoss thermostators. Among the Moscow plant "Santekhprom", which produces a bimetallic radiator "Santekhprom-BMN Auto" and convectors with a casing of the Santekhprom car series; OJSC "Mechanical Plant" (St. Petersburg) - steel panel radiator type "Conrad-Termo"; Plant "Radiator" (Kimra) - steel tubular radiator type "PC" and other convectors and steel radiators are equipped with thermostat valves for both two-pipe and for single-tube heating systems. Other devices with built-in thermostators are intended only for two-pipe systems. The Danfoss company thermostat valves built into the design of the heating device, according to its internal device and hydraulic characteristics, are usually similar to the valves of separately installed thermostators RA-N and RA-G. Specifications Russian heating devices with thermostators are given in the passports of manufacturers heating equipmentIn the relevant materials of Danfoss LLC, as well as included in the Danfoss S.O. Database To calculate heating systems on personal computers.

The main advantage of Danfoss valves type RA-G - High bandwidth (Ra-G DN \u003d 20 mm haskv \u003d 2.06 m3 / h at xp \u003d 2 ° C). This is important in single-tube heating systems to achieve the optimal values \u200b\u200bof the coefficient of the coolant of the coolant from the riser into the heater. High throughput obtained due to the large area of \u200b\u200bthe valve seat and an increased rod working stroke (more than 30% when using a thermostatic element with gas-condensate filling compared to thermostats filled with liquid). Data valves are connected with such bandwidth, having a European quality certificate EN215. This is due to their ability to hermetically overlapping the coolant consumption through the heating device when the temperature is exceeded in a room by 2 ° C greater than the calculated one. In addition, the valve represents a unique opportunity from the point of view of service: its saddle and cone, if necessary, can be completely replaced in place (without dismantling the valve).

RA-N valve for two-pipe heating pump; Ru \u003d 10 bar, TMAX. \u003d 120 ° С, with internal thread

Valves for a two-pipe system of heating RA

RA-N valve Designed for use in two-pipe pumping systems of water heating with pipelines from copper or stainless steel. To connect the valve fitting with a pipeline, special crimping tools are required.

RA-N valve for two-pipe heating pump; Ru \u003d 10 bar, TMAX. \u003d 120 ° C, for press connection with pipeline. Perhaps the use of manufacturing tools Geberit Mapress, Rems, Rothenberger, Sanha, Viega

Ra-G valve for single-tube pumping and two-pipe gravitational heating systems; Ru \u003d 10 bar, TMAX. \u003d 120 ° С, with internal thread

RA-G control valve It has increased bandwidth and is intended for use in pumping single-tube water heating systems with closing areas (bypass).

The remote control thermostat is used in the case when the heating devices and thermostat valves installed on them are not available for the user, for example, closed with non-removable decorative panels. In this case, the sensor and the settings node are combined. Remote control thermostators should be located at an altitude of 1.2-1.6 meters from the floor or in another available place so that the air can freely circulate around the sensor.

Device and principle of operation

The main device of the thermostatic element is a bellows that provides proportional regulation. The thermoelement sensor perceives the change in the ambient temperature. The bellows and the sensor are filled with an easy-to-sleep liquid and its pairs. The adjusted pressure in the bellows corresponds to the temperature of its charging. This pressure is balanced by the power of the tuning springs. With increasing air temperature around the sensor, part of the fluid evaporates, and the pressure of vapors in the bellows grows. In this case, the bellows increase in the volume by moving the valve spool towards the closing of the hole for the coolant duct into the heater until the balance between the spring force and the vapor pressure is reached. When the air temperature decreases, the pairs are condensed, and the pressure in the bellows is determined, which leads to a decrease in its volume and the movement of the valve spool towards the opening to the position, in which the equilibrium of the system will again be established.

Steam filling will always be condensed in the coldest part of the sensor, usually most remote from the valve body.

Therefore, the radiator thermostat will always respond to changes. room temperature, not feeling the temperature of the coolant in the underwear pipeline. However, when the air around the valve is still heated by heat, given by the pipeline, the sensor can register a higher temperature than indoors. Therefore, it is recommended to establish thermostatic elements to eliminate this influence, as a rule, in a horizontal position. Otherwise, it is necessary to apply thermoelements with remote sensor.

The thermostat Ra consists of two parts:

• universal thermostatic element of the RA 2000 series - automatic temperature control devices;
• adjusting valve with pre-tuning bandwidth Ra-N (for two-pipe heating systems) or RA-G (for a single-tube system).

The program of production of thermostatic elements of the RA 2000 series includes:

• RA 2994 and RA 2940 with a built-in temperature sensor, protection of the heating system from freezing, a range of temperature setting 5-26 ° C, a device for fixing and restricting the temperature setting. In contrast to Ra 2990, the thermoelement Ra 2940 additionally has a function that provides 100% overlap of the thermostat valve;
• RA 2992 - thermoelements with a remote sensor, protection of the heating system from freezing, a range of temperature setting 5-26 ° C, a device for fixing and restricting the temperature setting;
• RA 2920 - thermoelements with a casing that protects against unauthorized interference, built-in sensor, freezing protection, a range of temperature setting 5-26 ° C, a device for fixing and restricting the temperature setting;
• RA 2922 - Thermal elements with a casing that protects against unauthorized interference, a remote sensor, freezing protection, a range of temperature setting 5-26 ° C, a device for fixing and restricting the temperature setting.

Ra 2992 and Ra 2922 are equipped with an ultra-thin capillary tube with a length of 2 m, which is inside the body of the remote sensor, connecting it with the thermostatic element working bellows. In the installation process, the tube is pulled out to the required length.

The RA 5060/5070 series is a number of remote control thermoelements with the protection of the heating system from freezing, the temperature setting range is 8-28 ° C, a device for fixing and restricting the temperature setting:

• RA 5062 - with a length of the capillary tube 2 m;
• RA 5065 - with a capillary tube length 5 m;
• RA 5068 - with a capillary tube length of 8 m;
• Ra 5074 - with a capillary tube 2 + 2 m.

All thermostatic elements can be combined with any regulating valves of type RA.

Clip connection provides simple and accurate mounting of the thermoelement on the valve.

The protective cover of thermoelements RA 2920 and RA 2922 prevents their unauthorized dismantling and reconfiguration to unauthorized persons.

The technical characteristics of the radiator thermostators of the type RA correspond to European standards EN 215-1 and Russian GOST 30815-2002.

1) The remote sensor is supplied with a capillary tube, fully swept inside the sensor box. When installing the sensor, only the necessary part of the tube is unloaded.

2) The temperature scale is separated for xp \u003d 2 ° C. This means that the valve closes completely when the room temperature exceeds the setting temperature by 2 ° C.

3) For sealed overlap of the valve when the system operating under pressure and dismantling the heating device, it is necessary to use a brass handle.

Valve thermostatic with increased capacity RA-G

The valve thermostatic with increased bandwidth type RA-G is intended for use in pumping single-tube water heating systems. They can also be used in two-pipe gravitational systems.
The valves are thermostatic type RA-Gs have fixed bandwidth values.
All valves are thermostatic type Ra-Gs can be used with any thermo-static elements of the RA, RAW, RAX series or TWA-A thermoelectric drives. For identification, RA-G valves are supplied with gray protective caps.
The cap should not be used to overlap the adjustable medium. For these purposes should be used special metallic
Handle (code number 013g3300).
The pressure rod in the seal seal is made of chrome steel and does not require lubrication over the entire life of the valve.
All valves are thermostatic types of RA-G can be used with the entire list of compression fittings for copper pipes (information
About fittings on request). To prevent deposits and corrosion, the valves of type RA-G should be used in water heating systems, where the coolant meets the requirements of the maintenance rules of electric stations and thermal networks Russian Federation.

Nomenclature and specifications

Valve device

1. Slip seal
2. Ring seal
3. Plate of valve
4. Valve saddle
5. Purpose pin
6. Returning spring
7. Stank Valpana
8. Valve housing
9. Caid Nut
10. Connecting Nippel

Device

Thermostatic elements RA 2000 series

Thermostatic elements of the RA 2000 series - automatic temperature control devices designed to complete the radiator thermostators such as RA.Diatoric thermostat is a proportional direct-acting air temperature controller with a small proportion zone, which is currently equipped with system heating systems for various purposes.
The thermostat Ra consists of two parts:
universal thermostatic element of the RA 2000 series;
Adjusting valve with pre-tuning bandwidth Ra-N (for two-pipe heating systems) or RA-G (for a single-tube system).
The program of production of thermostatic elements of the RA 2000 series includes:
RA 2994 and RA 2940 with a built-in temperature sensor, protection of the heating system from freezing, a range of temperature setting 5-26 ° C, a device for fixing and restricting the temperature setting. In contrast to Ra 2990, the thermoelement Ra 2940 additionally has a function,
providing 100% overlap of the thermostat valve;
RA 2992 - Thermal elements with a remote sensor, protection of the heating system from freezing, a range of temperature setting 5-26 ° C, a device for fixing and is limited to a temperature setting;
RA 2920 - thermoelements with a casing that protects against unauthorized interference, built-in sensor, freezing protection, a range of temperature setting 5-26 ° C, a device for fixing and restricting the temperature setting;
RA 2922 - thermoelements with a casing that protects against unauthorized intervention, remote sensor, protection
From freezing, a range of temperature setting 5-26 ° C, a device for fixing and restricting the temperature setting.
Ra 2992 and Ra 2922 are equipped with an ultra-thin capillary tube with a length of 2 m, which is inside the body of the remote sensor, connecting it with the thermostatic element working bellows. During the installation, the tube is pulled out on the required length. Seria of RA 5060/5070 - a number of thermoelements of remote control with the protection of the heating system from freezing, the temperature setting range is 8-28 ° C, device
To fix and restrict temperature settings:
RA 5062 - with a length of the capillary tube 2 m;
RA 5065 - with a capillary tube length 5 m;
RA 5068 - with a capillary tube length of 8 m;
Ra 5074 - with a capillary tube 2 + 2 m.
All thermostatic elements can be combined with any regulating valves of the RA type. Cline compound provides easy
And the exact mounting of the thermoelement on the valve. The protection cover of thermoelements Ra 2920 and Ra 2922 prevents their unauthorized dismantling and reconfiguration by unauthorized persons. The technical characteristics of the radiator thermostators of the type RA correspond to European standards EN 215-1 and Russian GOST 30815-2002.

Nomenclature and code numbers for ordering
Thermostatic elements of the RA 2000 series

Extra accessories

Device of the thermostatic element with built-in and remote sensor
1 - tuning handle;
2 - working bellows;
3 - wing settings;
4 - a tuning spring;
5 - rod;
6 - remote sensor;
7 - capillary tube

Device of the thermostatic element of remote control with the built-in sensor
1 - tuning handle;
2 - working bellows;
3 - wing settings;
4 - valve drive;
5 - Drive Sylcon;

7 - capillary tube

Device thermostatic remote control element with remote sensor

1 - tuning handle;
2 - working bellows;
3 - settings;
4 - valve drive;
5 - Drive Sylcon;
6 - adapter for installation of the drive on the valve;
7 - capillary tube;
8 - remote sensor

dimensions

The main task of any heating system is to provide a comfortable air temperature in the room. This temperature can be different depending on the purpose of the room, but if it is a prerequisite for its immutability during the day, the thermostat becomes an indispensable structural element of the heating device.
Danfoss radiator thermostat consists of two parts: valve and thermostatic element (thermal heads). Inside the thermostatic element is a thin hermetic cylinder - a belliff filled with liquid or gaseous heat-sensitive working substance. When the temperature is raised, the bellows stretch and moves the rod associated with it, which presses on the rod in the valve, and the valve reduces the coolant flow into the radiator. When the temperature decreases, the process goes in reverse order. Thus, the thermal head is the control mechanism, and the valve is executive.

Manufacturer: Danfoss (Denmark).

Danfoss radiator thermostators valves

Valves of radiator thermostators are divided into:
- valves for a two-pipe heating pump system ( type RA-N) increased resistance with the installation of their bandwidth to perform the hydraulic balancing of the pipeline system;
- Valves of increased bandwidth type Ra-G for pumping single-tube or two-pipe gravitational heating system.

Valve housings Danfoss are made of brass. The compound provides a simple and accurate mounting of the thermostatic element on the adjusting valve. To identify Ra-N valves, their protective caps are painted in red, and Ra-G is in gray.

Danfoss RA-G thermoregulators valves

Danfoss RA-N thermoregulators valves

With the valves of the RA-G and RA-N series, you can combine the RA series.

A set of Danfoss thermostatic equipment consists of a radiator valve Ra-G (for a single-tube or two-pipe heating system) or Ra-n (for a two-pipe heating system) and the thermostatic element Ra.
The kit is intended for automatic control of air temperature in the room.
It is easy to install on various types of heating devices in a quarter area with a centralized single-tube and two-pipe heating system.

Thermostatic elements of Danfoss.

Thermostatic elements (thermal heads) Danfoss are automatic temperature control devices intended for a complete set of radiator thermostators.
The thermostat equipped with a thermostatic element maintains a constant temperature in the room at the desired level in the range from + 5 ° C to + 26 ° C with an accuracy of ± 1 ° C.
It should be remembered that thermostators are mostly regulatory reinforcement but not shut-off (With the exception of the thermostats RA2940 and RAW 5110), so if you need to disassemble the radiator, the thermal head should be replaced with a bronze shut-off handle, which will ensure the complete overlap of the coolant flow.

Thermostatic elements of Danfoss.

	RA 2994.	Thermostatic element with a gas-filled temperature sensor. Temperature adjustment range: from + 5 ° C to + 26 ° C.	1 440 rub.
	RA 2992.	Thermostatic element with a gas-filled remote temperature sensor. Temperature adjustment range: from + 5 ° C to + 26 ° C. The length of the Capillary Tube: 2 m.	2 200 rubles.
	RA 2920.	Thermostatic element with a gas-filled temperature sensor and protection against unauthorized intervention. Temperature adjustment range: from + 5 ° C to + 26 ° C.	2 190 rub.
	RA 2940.	Thermostatic element with a gas-filled temperature sensor. Temperature adjustment range: from + 0 ° C to + 26 ° C. The possibility of overlapping the supply of the coolant.	1 600 rub.
	RAW 5010.	Thermostatic element with liquid temperature sensor. Temperature adjustment range: from + 8 ° C to + 28 ° C.	1 390 rubles.
	RAW-K.	Thermostatic element with liquid temperature sensor. Temperature adjustment range: from + 8 ° C to + 28 ° C. To install on the built-in valves (M30X1.5) of the bottom liner - Rifar, Copa, Kermi, Demrad, Stelrad, Purmo, Korado.	1 390 rubles.
		Thermostatic remote control member with liquid temperature sensor. Temperature adjustment range: from + 8 ° C to + 28 ° C. Length of the capillary tube: 2 m (Ra 5062), 5 m (RA 5065).	4 590 rubles. 4 960 rub.

By installing thermostat, it should be remembered that the effect of their use will be tangible if they control radiators with low thermal inertia. Practically, these are all the well-known types of modern radiators besides cast iron. The latter, due to the large mass of the cast iron and the water will be heated and cool very slowly, reducing the control effect.

RLV shut-off and connecting valves are designed for lateral connection to the radiator of pipelines of a two-pipe heating system. We are produced in direct and corner execution.
P y \u003d 10 bar *; T max \u003d 120 ° C; ΔР Max \u003d 0.6 bar.

* Conditional pressure. See GOST 356-80 fittings and pipelines. Conditional pressure, trial and workers.