Thermostatic Radiator Valves
The range of Oventrop products allows the stockist, plumber and contractor to fulfil all technical requirements concerning radiators, accessories and the complete. heating system.
Oventrop valves and controls comply with the technical requirements to a high degree. They permit a hydronic adjustment of the flow rate and thus guarantee an economical heat output of the individual radiators.
Oventrop thermostatic radiator valves of the "Series A, AV6, RF and F" are officially approved and correspond to
:- the BS EN 215 standard (Reg. No. 6TOO02)
- the DIN 3841 standard
- the BS 6284 standard
Oventrop thermostatic radiator valves (valves of the "Series A" and thermostats "Uni LH" and "Uni L") exceed in every respect the values required in the different standards:
- Tensile strength: 815 N (1213 N*) Requirements according to BS EN 215 standard: 250 N
- Torsional strength: 25.8 Nm (29.8 Nm*) Requirements according to BS EN 215 standard: 8 Nm
- Heating medium temperature effect: 0.5 K/30 K
Requirements according to BS EN 215 standard: 1.5 K/30 K
- Differential pressure effect: 0.4 K/0.5 bar Requirements according to BS EN 215 standard: 1 K/0.5 bar - Hysteresis: 0.3 K
Requirements according to BS EN 215 standard: 1.0 K
Valve with thermostat "Uni LH" or "Uni L" anthracite/white
Valve with thermostat "Uni LH" or "Uni L" white RAL 9010
Function and composition:
The sensor element of the "Uni LH" and "Uni L" consists of a liquid filled metal capsule with immersed bellows and integral push rod.
A temperature fluctuation leads to an alteration of the volume of the liquid which entails a length modification of the immersed bellows. Thus the valve is closed or opened by means of the push rod.
1. Memory disc
2. Liquid sensor element
3. Overload spring
4. Graduation figure
6. Valve insert
7. Thread connection according to DIN standard (BS 21)
The wide range of valves - different series, sizes and dimensions - allows a practical, economical choice of valves and controls
Suitable for all Oventrop valves, the thermostats "Uni LH" (M 30 x 1.5), "Uni L" (M 30 x 1.0) and "Uni LD" (squeeze connection) and "Uni D" (wax sensor) are offered in all versions for different applications.
Thermostats automatically control the heat output of the individual radiators and thus maintain the desired room temperature.
The "Uni L, LH and LD" offer excellent characteristics:
- simple installation
- excellent design
- modern colour, white RAL 9010
- easy to read figures
- simple control of the nominal value by means of the memory disc (protected by patent)
- short response time.
- white, anthracite/white, black
- sensor at the valve, remote sensor
- with, without "0" setting
- different temperature ranges (temperature limiting and locking)
1 Thermostat "Uni LH" or "Uni L" with remote sensor white RAL 9010
2 Thermostat "Uni C" with and without remote sensor white RAL 9010
3 Thermostat "Uni D" (wax sensor) anthracite
Thermostat "Uni D" white
4 Thermostat "Uni D" with remote sensor anthracite
6 Thermostat with remote control white RAL 9010
7 Anti-theft ring for "Uni LH" and "Uni L" anthracite
8 Reinforcing cap for "Uni LH" and "Uni L" anthracite
1 "Series A"
The Oventrop valves of the "Series A" have the same flow rate for all sizes.
The "Series A" is the standard model for;:. one pipe and two pipe heating systems. The room-to-room adjustment of the heat output is made by means of the presettable radiator lockshield valves "Combi 4", "Combi 3" or "Combi 2".(not illustrated "Series AZ")
The Oventrop valves of the "Series AZ" correspond to those of the "Series A". They do, however, have a higher flow capacity. (not illustrated "Series RF")
The Oventrop valves of the "Series RF" correspond to those of the "Series A". They do, however, have reduced dimensions.
The valves of the "Series A, AV6 and ADV6" have identical bodies. The valve inserts are interchangeable.
2 "Series AV 6" with presetting
The Oventrop valves of the "Series AV6" are fitted with a presettable valve insert and therefore permit an adaption of the flow rates to the required heat demand. The valves of the "Series AV6" are used in two pipe heating systems with normal temperature difference.
3 "Series ADV 6" with presetting
The Oventrop valves of the "Series ADV 6" are fitted with a presettable valve insert and therefore permit an adapt ion of the flow rates to the required heat demand. Should the thermostat be removed or vandalised, the double function provokes an automatic closing of the valve to 5% of the nominal flow. An automatic frost protection is thus provided and an uncontrolled rise of temperature is impossible.
4 "Series F" with fine presetting
The Oventrop valves of the "Series F" offer a fine preset facility which is protected by patent. They are particularly suitable for heating systems with high temperature difference (district heating systems) or for installations with low flow rates.
Precise adjustment of the flow rate through the radiator.
For protection during transport and installation, the valves are delivered with protection caps. The colour of the cap also indicates the valve series:
"Series A" = black
"Series AZ" = orange
"Series AV6" = white
"Series ADV 6" = olive green
"Series RF" = blue
"Series F" = red
Radiator Lockshield Valves
"Combi 4" "Combi 3" "Combi 2"
For the return connection of the pipework to the radiator, Oventrop offers three types of radiator lockshield valves with proportional fine presetting for use in hot water heating systems
The Oventrop radiator lockshield valves are installed in the radiator return pipe. They allow the removal of radiators without the necessity to drain the system.
Oventrop radiator lockshield valve
for reproducible presetting, isolating, filling and draining of the radiator.
Oventrop radiator lockshield valve
for presetting, isolating, filling and draining of the radiator.
Oventrop radiator lockshield valve
for presetting and isolating of the radiator.
Systems of Radiator Connection
1 Two pipe system
2 "Bypass-Combi Duo"
3 "h" system
4 Conversion fittings
5 One pipe system
6 "Bypass-Combi Uno"
7 Single pipe radiator valve "Tauchrohr" with horizontal and vertical insertion tube
8 Three-way bypass valve
Systems of Radiator Connection
Exclusive Radiator Valves
Oventrop thermostatic radiator and lockshield valves of the exclusive "Series E" for the elegant interior. A modern concept combining exclusive form and functional design.
The Oventrop valves of the "Series E" are available in angle, straight. reversed angle and double angle pattern, the radiator lockshield valves of the "Series E" in angle and straight pattern.
Angle/straight pattern radiator and lockshield valves: white powder coated chrome plated gold plated
sand blasted and nickel plated
Reversed angle and double angle pattern valves:
white powder coated
Exclusive Radiator Valves
Thermostats, Valves and Fittings for Radiators with Conventional Valve Connection
Hydronic balancing valves, controls, and actuators
Necessity of hydronic balancing
Hydronic balancing of heating and cooling systems is necessary to avoid the following problems:
- some rooms almost never achieve the desired room temperature or are not cooled sufficiently. This problem especially arises in case of influence of other heat sources.
- after changing over from low temperature to heating operation, parts of the system are only heated after a long time
- fluctuating room temperatures especially arising during low demand periods
- high energy consumption although the required room temperature regulator is installed
The illustration shows that the pump has to produce a differential pressure of at least ~ Platal to guarantee a sufficient supply to appliance 4. This will, however, inevitably result in an excessive differential pressure at the appliances 1 to 3. This too high a differential pressure will cause an increased flow at these appliances and thus to an increased energy consumption. To remedy this, double regulating and commissioning valves are installed. The excessive differential pressure is now absorbed by the double regulating and commissioning valves. The desired flow rate may be controlled and set. To be able to control appliance 4 as well, it is recommended to install a double regulating and commissioning valve here, too. The correct supply of each appliance is now guaranteed.
Wrong flow rates in the various circuits lead to an increased energy consumption. On the one hand, a higher pump capacity must be provided to guarantee a sufficient supply of each appliance and on the other hand appliances being installed at a favourable hydronic position are then over- supplied. This will result in an increased room temperature or, in cooling systems, in too Iow a room temperature. If the average temperature in a building exceeds the nominal value by 1 °C, the energy consumption is increased by 6-10%. In cooling systems, temperatures being 1°C too low will result in an increase in energy consumption of about 15%. Installations in which the hydronic balancing was not carried out, have to start the heating operation earlier in order to achieve the desired temperature in time.
How to avoid noises at the TRVs
If the installation is a two pipe installation, not only the design demand but also the periods of low demand have to be considered. The differential pressure at the TRVs has to be limited to approximately 200 mbar. If this value is not exceeded, the thermostatic radiator valves normally do not produce any flow or whistling noises. This condition is met by installing differential pressure regulators in the corresponding circuits.
Hydronic balancing on site
In order to guarantee an optimum operation of a heating or cooling system, i. e. an energy supply to those sections of the system which are located far away from the pump and those located near the pump, even if the installed system deviates from the planned system or parts of the system were modified, a subsequent hydronic balance may become necessary.
For this purpose, Oventrop offers the flow meter "OV-DMC 2" which was especially conceived for the regulation of heating and cooling systems.
Apart from the computer method, balanced pressure method and kv-value method, the OV-Balance method is especially suitable for the regulation of existing installations.
Using the computer method, the Oventrop flow meter "OV-DMC 2" calculates the presetting of the commissioning valve which is required for the desired flow rate.
To do so, the flow rate is measured at two different presettings after having entered the valve type. Now the valve is set at the new value which was calculated by the "OV-DMC 2".
Balanced pressure method: Measuring like computer method, but the flow rate is measured at only one presetting. Especially suitable for the control of flow rates.
Is used for the measurement of flow rates of any valves and metering stations with known kv-values.
Regulation with balanced pressure - and kv-value method
Regulation with the help of flow measurement by differential pressure measurement at metering station
Distribution of flow
The main reason for these problems is that incorrect flows are available in the various circuits. If this is the case, the problem may be solved by installing double regulating and commissioning valves, differential pressure regulators or flow regulators in the corresponding pipes. The course of pressure in a circuit makes clear why this occurs.
Double regulating and commissioning valve “Hydrocontrol”
With their balancing systems, Oventrop offers the installer all the valves and valve combinations necessary to achieve the hydronic balance of heating and cooling systems. The products can be delivered separately or as a system. Thus, the appropriate valves and valve combinations are available for any possible demand.
The bronze double regulating and commissioning valves "Hydrocontrol R"/"Hydrocontrol FR" are installed in hot water central heating systems ("Hydrocontrol R": PN 25/150 degreesC,"Hydrocontrol FR": PN 16/150 degreesC) and cooling systems in order to provide a hydronic balance between the various circuits of the system. The bronze double regulating and commissioning valves “Hydrocontrol FR" are also suitable for cold salt water (38 degreesC max.) and domestic water. The calculated flow rate or pressure loss can be preset for each individual circuit, thus making the hydronic balance easy to achieve.
They can be installed in either the supply or the return pipe.
Sectioned double regulating and commissioning valve "Hydrocontrol R"
Sectioned double regulating and commissioning valve "Hydrocontrol F"
Double regulating and commissioning valve
Oventrop double regulating and commissioning valves "Hycocon V" are installed in hot water central heating and cooling systems and serve to achieve a hydronic balance between the various circuits of the system.
Precise balancing can be achieved due to an infinitely adjustable presetting with memory position which is lockable and lead sealable. Sizes DN 15 to DN 25 with six and sizes DN 32 and DN 40 even with eight major graduation values divided into steps of 1/10th (i.e. 60 or 80 presetting values) guarantee a high resolution with small flow tolerances.
Installation is possible in either the supply or the return pipe.
Double regulating and commissioning valve "Hycocon V" Model: both ports female thread according to EN 10226 (BS 21)
Double regulating and commissioning valve "Hycocon V" combined with flow-meter “OV-DMC 2”
Presetting Basic and fine setting scale
Pressure test points for use with flow-meter “OV-DMC 2”
Examples of installation in cooling systems
Oventrop regulating valve “Cocon” with actuator installed in a chilled ceiling
Regulation of a regulating valve “Cocon” by use of the flow-meter “OV-DMC 2”
Control of a regulated valve “Cocon” via an electrothermal actuator
Examples of installation in Fan-Coil units
Chilled ceiling systems make up a growing share in the cooling sector for office buildings. With due consideration to some basic rules, these systems may also be used for heating.
The correct choice of the most suitable hydronic system is of major importance. Oventrop are able to offer products required for the correct design of the hydronic system for these applications including regulators, actuators and "Cocon" regulating valves. These valves have the facility for flow regulation and measurement to allow a hydronic balance of the system to be carried out. The valves also have integrated isolating, filling and draining facilities.
A full range of actuators are available to 'allow the most suitable control of the valve for its application. For proportional control the valve operates with a linear characteristic line (linear flow depending on the piston stroke).
1. Suspended Fan-Coil unit with valve group consisting of two four-port regulating valves “Cocon 4” for heating and cooling circuit with electrothermal actuators.
2. Detailed view of suspended Fan-Coil unit with valve group consisting of two four-port regulating valves “Cocon 4” and electromotive (proportional 0-10 V) actuators.
3. Vertical Fan-Coil unit with valve group consisting of one four-port regulating valve “Cocon 4” and electrothermal actuator.
4. Four-port regulating valve “Cocon 4” with actuators
- electrothermal actuator (two point)
- proportional electromotive actuator
- electromotive actuator system EIB or LON®
5. Four-port regulating valve “Cocon 4” with flow-meter “OV-DMC 2”. The flow rate may be directly read off the flow-meter.
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