EP0130075A2 - Space heating apparatus and valve assemblies therefor - Google Patents
Space heating apparatus and valve assemblies therefor Download PDFInfo
- Publication number
- EP0130075A2 EP0130075A2 EP84304282A EP84304282A EP0130075A2 EP 0130075 A2 EP0130075 A2 EP 0130075A2 EP 84304282 A EP84304282 A EP 84304282A EP 84304282 A EP84304282 A EP 84304282A EP 0130075 A2 EP0130075 A2 EP 0130075A2
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- EP
- European Patent Office
- Prior art keywords
- valve assembly
- flow
- bypass passage
- heating unit
- return
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/0002—Means for connecting central heating radiators to circulation pipes
- F24D19/0009—In a two pipe system
Definitions
- This invention is concerned with improvements in or relating to central heating systems.
- the invention provides space heating apparatus adapted to be connected in a central heating system of the double line fluid flow type, the apparatus comprising a space heating unit (e.g. a radiator of the hot water type), a flow valve assembly adapted to connect the heating unit to a flow line of the central heating system, and a return valve assembly adapted to connect the heating unit to a return line of the central heating system; each valve assembly comprising a bypass passage series-connectible to the flow or return line respectively, and a branch passage connecting the bypass passage to the heating unit, characterised in that the return valve assembly is separate from the flow valve assembly, and each valve assembly comprises a housing portion which is elongated along an axis (e.g. the axis of a lower horizontal radiator duct) about which the valve assembly is mechanically secured to the heating unit and in which elongated portion is provided the bypass passage.
- a space heating unit e.g. a radiator of the hot water type
- a flow valve assembly adapted to connect the heating unit to a flow line of the central heating
- the axis about which the flow valve assembly is secured to the heating unit is usually, but not necessarily, coaxial with the axis about which the return valve is secured.
- the invention also comprehends a flow or return valve assembly adapted for use in apparatus according to the invention, the valve assembly comprising a bypass passage, series connectible to the flow or return line and a branch passage adapted to connect the bypass passage to the heating unit, characterised in that the valve assembly comprises a housing portion which is elongated along an axis (e.g. the axis of a lower horizontal radiator duct) about which the valve assembly is mechanically securable to the heating unit, the bypass passage is provided in the elongated portion and extends along said axis; and the branch passage comprises an end portion which is directly mechanically securable to the heating unit, is provided in said elongated housing portion coaxially with the bypass passage, and is isolated from the bypass passage by a fixed transverse barrier.
- the valve assembly comprises a housing portion which is elongated along an axis (e.g. the axis of a lower horizontal radiator duct) about which the valve assembly is mechanically securable to the heating unit, the bypass passage is provided in the
- the invention also comprehends a double line central heating system comprising a plurality of heating units, flow valve assemblies, and return valve assemblies according to the invention.
- the flow and return lines to which the valve assemblies are connected are e.g. of flexible tubing (e.g. of soft thin-walled copper, or steel or of plastics) with all joints (which are e.g. compression joints) readily accessible.
- the apparatus embodying the invention comprises a plurality of space heating radiators 10 (an upstream one of which is shown in Figure 1), and flow and return lines 12, 14 respectively leading to and from a hot water boiler 15 ( Figure 2).
- the apparatus also comprises a flow valve assembly 16 mechanically secured in conventional fashion to the right hand side of each radiator 10 and a return valve assembly 18 separate from the flow valve assembly 16; the return valve assembly 18 being mechanically secured to the left hand side of the radiator 10; each valve assembly 16, 18 is secured to the radiator 10 about the axis of the lower horizontal duct 11 of the radiator 10.
- the valve assemblies 16, 18, connect the radiator to the flow and return lines 12, 14 respectively and the flow paths are indicated in the drawings.
- the return valve assembly 18 comprises a thermostatically operated main control valve 20, and a throttle valve 22 for flow balancing purposes.
- the flow valve assembly 16 comprises an isolation valve 24 for radiator isolating purposes.
- the control valve 20 and the throttle valve 22 are mounted in a housing 23 of integral construction the horizontally extending portion of which is elongated along the axis of the duct 11.
- the housing 23 comprises a horizontal bore 25 which is co-axial with the duct 11, and a separate horizontal bore 27 which extends in the housing 23 parallel to the bore 25; a third bore 29 extends from the upstream end portion 30 of the bore 25 and is inclined away from the radiator 10 at an acute angle to the bores 25, 27; the bore 29 communicates with the bore 27 as well as with the upstream end portion 30 of the bore 25.
- the axes of the bores 25, 27, 29 all lie in the same vertical plane.
- An inlet bore and an outlet bore 31, 33 for the return line 14 lead into the bore 25 at right angles to the bore 25 and their axes also lie in the same vertical plane as the axes of the bores 25, 27, 29.
- the control valve 20 is secured in an enlarged portion of the bore 27 and comprises a thermostatic head 35 of known type and a conical valve member 37 arranged to move towards and away from a valve seating 39 to vary the flow from the bore 27 into the bore 25 in the operation of the valve assembly, and hence control the operation of the radiator 10.
- the throttle valve 22 comprises a valve member 41 screwed into a threaded portion 43 of the bore 29 and arranged to move towards and away from a valve seating 45; the valve member 41 is provided with a screwdriver slot 47; the housing 23 is externally threaded around the valve member 41 to receive a screw end cap (not shown).
- a plug 49 is fixed in the bore 25 between its junction with the bore 29 and the junction with the bore 31; and provides a transverse barrier isolating the upstream end portion 30 of the bore 25, from the remainder of the bore 25 which itself provides a bypass passage 51 in the horizontally extending portion of the housing 23, extending between the bores 31, 33 and series connected thereby to the return line 14.
- the end portion 30 and the bores 29, 27 provide a branch passage adapted to connect the radiator duct 11 to the bypass passage 51; it will be noted that the end portion 30 is directly mechanically secured to the radiator duct 11.
- the isolation valve 24 of the flow valve assembly 16 is mounted in a housing 53 of integral construction, the horizontally extending portion of which is also elongated along the axis of the radiator duct 11.
- the housing 53 comprises a horizontal bore 55 which is coaxial with the radiator duct 11; and a bore 59 which extends from the downstream end portion 60 of the bore 55 and is inclined away from the radiator 10 at an acute angle to the bore 55.
- a bore 61 leads at right angles from the bore 55 and provides communication between the bores 55, 59.
- the axes of the bores 55, 59, 61 all lie in the same vertical plane.
- An inlet bore and an outlet bore 71, 73 for the flow line 12 lead into the bore 55 at right angles to the bore 55 and their axes lie in the same vertical plane as the axes of the bores 55, 59, 61; the bore 71 is coaxial with the bore 61.
- the isolation valve 24 comprises a valve member 81 screwed into a threaded portion 83 of the bore 59 and arranged to move towards and away from a valve seating 85; the valve member 81 is provided with a screwdriver slot 87; the housing 53 is externally threaded around the valve member 81 to receive a screw end cap (not shown).
- a plug 89 is fixed in the bore 55 between its junction with the bore 59 and its junction with the bores 61, 71; and provides a transverse barrier isolating the downstream end portion 60 of the bore 55 from the remainder of the bore 55 which itself provides a bypass passage 91 in the horizontally extending portion of the housing 53, extending between the bores 71, 73 and series connected thereby to the flow line 12.
- the bores 61, 59 and the end portion 60 provide a branch passage adapted to connect the bypass passage 91 to the radiator duct 11. It will be noted that the end portion 60 is directly mechanically secured to the radiator duct 11.
- a shoulder 96 is provided between the bores 61, 59, and the shoulder 96 extends upwardly from the bore 55 as shown in Figure 1.
- the throttle valve 22 is pre-set for flow balancing purposes and when it is required to isolate the radiator 10 the control valve 20 is positively closed and also the isolating valve 24: all flow is then necessarily through the bypass passages 91, 51.
- the bores 31, 33 of the valve assembly 18 are interchangeable as inlet and outlet.
- the bores 71, 73 of the valve assembly 16 are similarly interchangeable as inlet and outlet.
- the bore 73 of the valve assembly 16 is connected to the bore 31 of the valve assembly 18 via a throttle 100; it will be realized that should it be desired to expand the number of radiators, it is a simple matter to remove this connection between the bores 73, 31 and to connect up additional radiators.
- the bores 73, 31 of the terminal downstream radiators can simply be closed with blind fittings, which still leaves the facility for expansion.
- a conventional flow and return valve can be used for the terminal downstream radiator, but then there is neither continuous circulation nor the facility for expansion, without replacing the valves of the terminal radiator.
- the tubing is for example from 6 to 22 mm in outer diameter with a wall thickness of about 1 mm; it may be supplied pre-insulated with an outer sleeve of thermal insulating material, for example 2 to 3.5 mm in wall thickness.
- the copper tubing has for example the following properties:
- the tubing is for example from 10 to 18 mm in outer diameter with a wall thickness of about 1 mm, and may be plastic-coated against corrosion; again the steel tubing may be supplied pre-insulated with an outer sleeve of thermal insulating material for example 2 to 3.5 mm in thickness.
- the steel tubing has for example the following properties:
- the tubing is for example from 10 to 28 mm in outer diameter with a wall thickness from 1.8 to 4.0 mm.
- the main pipe runs may be within the floor, wall or ceiling, exposed or located within skirting.
- Figure 3 shows the main pipe runs within the floor with vertical branches extending above floor level for connection to the valve assemblies 16, 18. The absence of pipe connections below floor level will be noted.
- a compression olive fitting is illustrated in Figure 4 with reference to the bore 31.
- a pipe 102 is received in the bore 31 and a compression olive 104 surrounds the end portion of the pipe 102.
- the olive 104 comprises opposed frusto-conical end portions and a cylindrical central portion.
- One end portion of the olive 104 is engaged by a complementary frusto-conical rim on the bore 31 and the other end portion of the olive is engaged by a corresponding rim on a nut 106. Tightening the nut results in the two rims camming the end portions of the olive into a sealing engagement.
- valve assemblies 16, 18 can be varied according to floor, skirting or ceiling requirements, and this is facilitated by their radially compact axially elongated configuration.
- the thermostatically operated valve 20 may be replaced by a manually operable valve, or alternatively the return valve assembly 18 can be replaced by a valve assembly 16' (not shown) resembling the flow valve assembly 16 with the valve 24 of the return valve assembly 16' then being used for flow balancing purposes and the valve 24 of the flow valve assembly 16 replaced by a manually operable main control valve.
- a hand wheel provided on the isolation valve 24 could provide for instant manual shut off of the radiator over-riding the thermostatically operated valve 20.
- the return valve assembly of Figure 5 comprises a third bore 529 which extends from the upstream end portion 30 of the bore 25 and is inclined away from the radiator 10 at an acute angle to the bores 25, 27.
- the bore 529 leads into a bore 600 which extends at right angles from the bore 27 and the bores 529. 600 together provide communication between the end portion 30 of the bore 25, and the bore 27.
- the bore 600 extends beyond its junction with the bore 529 and the throttle valve member 41 is screwed into the bore 600, being arranged to move towards and away from a valve seating 545.
- the flow valve assembly of Figure 5 comprises a bore 559 which extends from the downstream end portion 60 of the bore 55 and is inclined away from the radiator 10 at an acute angle to the bore 55.
- the bore 559 leads into a bore 561 which extends at right angles from the bore 55 and is coaxial to the bore 71; the bore 561 provides communication between the end portion 60 of the bore 55, and the bore 559.
- the bore 561 extends beyond its junction with the bore 559 and the isolation valve member 81 is screwed into the bore 561 being arranged to move towards and away from a valve seating 585.
- valve assembly 16 similar to 16' as described above but the flow valve assembly 16 is split into upper and lower valve assemblies 16a and 16b, respectively adjacent upper and lower portions of the radiator connected by a pipe 130.
- the main control valve 20 (thermostatic or manual) is provided in the upper valve assembly 16a, and the remainder of the flow paths are provided in the lower valve assembly 16b, as indicated by the arrows in Figure 7.
- the valve assembly 16b ( Figure 7) comprises a pipe connector 132 connected horizontally to the radiator 10 and vertically to the pipe 130.
- the valve assembly also comprises a body portion 134 abutting a sealing ring 136 between the pipe connector 132 and the body portion 134; the body portion 134 is connected to the flow line 12 by inlet and outlet bores 135, 137.
- An elongated screw member 138 is screwed into the pipe connector 132 and secures the body portion 134 to the pipe connector 132.
- a sealing ring 140 is provided between a head 139 of the screw member 138 and the body portion 134. It will be realized that loosening of the screw member 138 permits adjustment of the body portion 134 relative to the pipe connector 132 about the axis of the body portion 134 according to skirting requirements etc.
- the flow line 12 leads as a branch off a main vertical flow line 212 serving e.g. several floors of a multi-storey building with branch flow lines at each floor; and similarly the return line 14 leads as a branch to a main vertical return line 214.
- the water flows concurrently along the flow and return lines 12, 14 rather than countercurrently as in Figure 2.
- the bore 73 of the valve assembly 16 of the right hand radiator 10 is blanked off, as is the bore 33 of the left hand radiator 10.
- branch flow and return lines may be run off in parallel flow connection with the lines 12, 14 to serve other areas of the building at the same floor level.
- each return valve assembly 18 is connected to the i return line 14 via a floor heating pipe loop 414 and a common manifold 416.
- the bores 31 are all blanked off.
- the floor heating loops 414 are controlled by the control valves 20 and will shut off with the radiators; each loop 414 being controlled with its own radiator 10 independently of the other loops 14 and their radiators.
- Plastic pipework is normally used for the floor heating loops and accordingly it is convenient to use it also for the radiator connections in the modifications of Figures 9 and 10.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
A double line central heating system is provided with separate flow and return valve assemblies (16, 18) for each radiator. Each valve assembly comprises a bypass (91,51) in a horizontally elongated housing portion for connection to the flow and return lines (12, 14) respectively. Modem flexible tubing of soft thin-walled copper or steel or of plastics may be used for the flow and return lines and all joints are readily accessible; joints underfloor or otherwise inaccessible are avoided.
Description
- This invention is concerned with improvements in or relating to central heating systems.
- For a number of years modern continuous flexible soft thin-walled copper or steel tubing or plastics tubing has been used to advantage for the pipework of central heating systems of the single line type: such pipework is convenient to install and leaks are minimized. However this pipework has not generally been adopted for systems of the double line type. In a conventional double-line system multiple connections are required since each heating unit must be connected separately to the flow and return lines which are often underfloor, whereas in a single line system with modern continuous pipework there are no underfloor joints required. The compression fittings usual in single line systems are totally unacceptable for underfloor applications on account of the risk of leakage.
- It is one object of the present invention to provide an improved space heating apparatus suitable for use in a double line central heating system and in which advantage can be taken of modern pipework.
- The invention provides space heating apparatus adapted to be connected in a central heating system of the double line fluid flow type, the apparatus comprising a space heating unit (e.g. a radiator of the hot water type), a flow valve assembly adapted to connect the heating unit to a flow line of the central heating system, and a return valve assembly adapted to connect the heating unit to a return line of the central heating system; each valve assembly comprising a bypass passage series-connectible to the flow or return line respectively, and a branch passage connecting the bypass passage to the heating unit, characterised in that the return valve assembly is separate from the flow valve assembly, and each valve assembly comprises a housing portion which is elongated along an axis (e.g. the axis of a lower horizontal radiator duct) about which the valve assembly is mechanically secured to the heating unit and in which elongated portion is provided the bypass passage.
- The axis about which the flow valve assembly is secured to the heating unit is usually, but not necessarily, coaxial with the axis about which the return valve is secured.
- The invention also comprehends a flow or return valve assembly adapted for use in apparatus according to the invention, the valve assembly comprising a bypass passage, series connectible to the flow or return line and a branch passage adapted to connect the bypass passage to the heating unit, characterised in that the valve assembly comprises a housing portion which is elongated along an axis (e.g. the axis of a lower horizontal radiator duct) about which the valve assembly is mechanically securable to the heating unit, the bypass passage is provided in the elongated portion and extends along said axis; and the branch passage comprises an end portion which is directly mechanically securable to the heating unit, is provided in said elongated housing portion coaxially with the bypass passage, and is isolated from the bypass passage by a fixed transverse barrier.
- The invention also comprehends a double line central heating system comprising a plurality of heating units, flow valve assemblies, and return valve assemblies according to the invention. The flow and return lines to which the valve assemblies are connected are e.g. of flexible tubing (e.g. of soft thin-walled copper, or steel or of plastics) with all joints (which are e.g. compression joints) readily accessible.
- There now follows a description, to be read with reference to the accompanying drawings of double line central heating systems embodying the invention. This description is given by way of example only, and not by way of limitation of the invention.
- In the accompanying drawings:
- Figure 1 shows partly diagrammatically a flow arrangement to a central heating radiator;
- Figure 1A shows a section on the
line 1A-1A of Figure 1; - Figure 1B shows a section on the
line 1B-1B of Figure 1; - Figure 2 shows a flow diagram of a double line central heating system;
- Figure 3 shows an overall view of the flow arrangement of Figure 1;
- Figure 4 shows a compression-type pipe fitting;
- Figure 5 shows a flow arrangement similar to Figure 1 incorporating modified valve assemblies;
- Figure 6 shows a modified flow arrangement;
- Figure 7 shows an enlarged view of parts of Figure 6; and
- Figures 8, 9 and 10 show partial flow diagrams of modified central heating systems.
- The apparatus embodying the invention comprises a plurality of space heating radiators 10 (an upstream one of which is shown in Figure 1), and flow and
return lines - The apparatus also comprises a
flow valve assembly 16 mechanically secured in conventional fashion to the right hand side of eachradiator 10 and areturn valve assembly 18 separate from theflow valve assembly 16; thereturn valve assembly 18 being mechanically secured to the left hand side of theradiator 10; eachvalve assembly radiator 10 about the axis of the lower horizontal duct 11 of theradiator 10. The valve assemblies 16, 18, connect the radiator to the flow andreturn lines - The
return valve assembly 18 comprises a thermostatically operatedmain control valve 20, and athrottle valve 22 for flow balancing purposes. Theflow valve assembly 16 comprises anisolation valve 24 for radiator isolating purposes. - The
control valve 20 and thethrottle valve 22 are mounted in ahousing 23 of integral construction the horizontally extending portion of which is elongated along the axis of the duct 11. Thehousing 23 comprises ahorizontal bore 25 which is co-axial with the duct 11, and a separatehorizontal bore 27 which extends in thehousing 23 parallel to thebore 25; athird bore 29 extends from theupstream end portion 30 of thebore 25 and is inclined away from theradiator 10 at an acute angle to thebores bore 29 communicates with thebore 27 as well as with theupstream end portion 30 of thebore 25. The axes of thebores return line 14 lead into thebore 25 at right angles to thebore 25 and their axes also lie in the same vertical plane as the axes of thebores - The
control valve 20 is secured in an enlarged portion of thebore 27 and comprises athermostatic head 35 of known type and aconical valve member 37 arranged to move towards and away from avalve seating 39 to vary the flow from thebore 27 into thebore 25 in the operation of the valve assembly, and hence control the operation of theradiator 10. - The
throttle valve 22 comprises avalve member 41 screwed into a threaded portion 43 of thebore 29 and arranged to move towards and away from a valve seating 45; thevalve member 41 is provided with ascrewdriver slot 47; thehousing 23 is externally threaded around thevalve member 41 to receive a screw end cap (not shown). - A
plug 49 is fixed in thebore 25 between its junction with thebore 29 and the junction with thebore 31; and provides a transverse barrier isolating theupstream end portion 30 of thebore 25, from the remainder of thebore 25 which itself provides abypass passage 51 in the horizontally extending portion of thehousing 23, extending between thebores return line 14. - The
end portion 30 and thebores bypass passage 51; it will be noted that theend portion 30 is directly mechanically secured to the radiator duct 11. - The
isolation valve 24 of theflow valve assembly 16 is mounted in ahousing 53 of integral construction, the horizontally extending portion of which is also elongated along the axis of the radiator duct 11. - The
housing 53 comprises ahorizontal bore 55 which is coaxial with the radiator duct 11; and abore 59 which extends from thedownstream end portion 60 of thebore 55 and is inclined away from theradiator 10 at an acute angle to thebore 55. A bore 61 leads at right angles from thebore 55 and provides communication between thebores bores flow line 12 lead into thebore 55 at right angles to thebore 55 and their axes lie in the same vertical plane as the axes of thebores - The
isolation valve 24 comprises avalve member 81 screwed into a threadedportion 83 of thebore 59 and arranged to move towards and away from avalve seating 85; thevalve member 81 is provided with ascrewdriver slot 87; thehousing 53 is externally threaded around thevalve member 81 to receive a screw end cap (not shown). - A
plug 89 is fixed in thebore 55 between its junction with thebore 59 and its junction with the bores 61, 71; and provides a transverse barrier isolating thedownstream end portion 60 of thebore 55 from the remainder of thebore 55 which itself provides abypass passage 91 in the horizontally extending portion of thehousing 53, extending between thebores 71, 73 and series connected thereby to theflow line 12. Thebores 61, 59 and theend portion 60 provide a branch passage adapted to connect thebypass passage 91 to the radiator duct 11. It will be noted that theend portion 60 is directly mechanically secured to the radiator duct 11. - It will also be noted that a
shoulder 96 is provided between thebores 61, 59, and theshoulder 96 extends upwardly from thebore 55 as shown in Figure 1. - In the operation of the apparatus, when the
control valve 20 is open a portion of the water flowing through thebypass passage 91 of theflow valve assembly 16 is diverted through the bore 61, past theshoulder 96 into thebore 59, and thence to the radiator via theend portion 60 of thebore 55. Theplug 89 prevents direct flow from thepassage 91 into theend portion 60. The water exiting from the radiator passes into theend portion 30 of thebore 25 of thereturn valve assembly 18 and via thebore 29 and thebore 27, past thevalve member 37 into thebypass passage 51 where it joins the return line water flowing through thebypass passage 51. Theplug 49 prevents direct flow from theend portion 30 into thepassage 51. - When the
control valve 20 is closed, there is essentially no flow through the radiator and all the water from the flow andreturn lines bypass passages - When the
valve assembly 16 is oriented as shown in Figure 1 theshoulder 96 provides a heat shield to minimise undesired convection heating of theradiator 10. - The
throttle valve 22 is pre-set for flow balancing purposes and when it is required to isolate theradiator 10 thecontrol valve 20 is positively closed and also the isolating valve 24: all flow is then necessarily through thebypass passages - The
bores valve assembly 18 are interchangeable as inlet and outlet. When the boiler 15 is to the left of the radiators as shown in Figure 2, it may be convenient for 31 to provide the inlet and 33 to provide the outlet and vice versa when the boiler is to the right. Thebores 71, 73 of thevalve assembly 16 are similarly interchangeable as inlet and outlet. - In order to provide for continuous circulation of water, even when all the
control valves 20 of all theradiators 10 are closed: at the terminal downstream radiator 10 (Figure 2) thebore 73 of thevalve assembly 16 is connected to thebore 31 of thevalve assembly 18 via athrottle 100; it will be realized that should it be desired to expand the number of radiators, it is a simple matter to remove this connection between thebores bores - Modern continuous flexible soft thin-walled copper or steel tubing or plastics tubing is used for the flow and
return lines -
- If of steel, the tubing is for example from 10 to 18 mm in outer diameter with a wall thickness of about 1 mm, and may be plastic-coated against corrosion; again the steel tubing may be supplied pre-insulated with an outer sleeve of thermal insulating material for example 2 to 3.5 mm in thickness. The steel tubing has for example the following properties:
- If of plastics (e.g. high density cross linked polyethylene), the tubing is for example from 10 to 28 mm in outer diameter with a wall thickness from 1.8 to 4.0 mm.
- The main pipe runs may be within the floor, wall or ceiling, exposed or located within skirting. Figure 3 shows the main pipe runs within the floor with vertical branches extending above floor level for connection to the
valve assemblies - A compression olive fitting is illustrated in Figure 4 with reference to the
bore 31. Apipe 102 is received in thebore 31 and acompression olive 104 surrounds the end portion of thepipe 102. The olive 104 comprises opposed frusto-conical end portions and a cylindrical central portion. One end portion of the olive 104 is engaged by a complementary frusto-conical rim on thebore 31 and the other end portion of the olive is engaged by a corresponding rim on anut 106. Tightening the nut results in the two rims camming the end portions of the olive into a sealing engagement. - The orientation of the
valve assemblies - It will be realized that all the flow valve assemblies 16 (and all the return valve assemblies 18) need not be on the same side of their respective radiators as shown in Figure 2: it is perfectly possible to have some radiators with the
flow valve assembly 16 on the left and others on the right of the radiator according to convenience. - The thermostatically operated
valve 20 may be replaced by a manually operable valve, or alternatively thereturn valve assembly 18 can be replaced by a valve assembly 16' (not shown) resembling theflow valve assembly 16 with thevalve 24 of the return valve assembly 16' then being used for flow balancing purposes and thevalve 24 of theflow valve assembly 16 replaced by a manually operable main control valve. - Again the extent to which a manual control valve is operable can be pre-set for flow balancing purposes; it will be realized here that the more remote the radiator is from the boiler, the wider the required maximum extent of opening of the valve.
- A hand wheel provided on the
isolation valve 24 could provide for instant manual shut off of the radiator over-riding the thermostatically operatedvalve 20. - The flow arrangement shown in Figure 5 resembles that shown in Figure 1 but the flow and return valve assemblies are somewhat modified. The valve assemblies of Figure 5 correspond in many respects to those of Figure 1 and are described insofar as they differ therefrom.
- The return valve assembly of Figure 5 comprises a third bore 529 which extends from the
upstream end portion 30 of thebore 25 and is inclined away from theradiator 10 at an acute angle to thebores bore 600 which extends at right angles from thebore 27 and the bores 529. 600 together provide communication between theend portion 30 of thebore 25, and thebore 27. Thebore 600 extends beyond its junction with the bore 529 and thethrottle valve member 41 is screwed into thebore 600, being arranged to move towards and away from avalve seating 545. - The flow valve assembly of Figure 5 comprises a
bore 559 which extends from thedownstream end portion 60 of thebore 55 and is inclined away from theradiator 10 at an acute angle to thebore 55. Thebore 559 leads into abore 561 which extends at right angles from thebore 55 and is coaxial to the bore 71; thebore 561 provides communication between theend portion 60 of thebore 55, and thebore 559. Thebore 561 extends beyond its junction with thebore 559 and theisolation valve member 81 is screwed into thebore 561 being arranged to move towards and away from a valve seating 585. - In the modification of Figures 6 and 7 the
return valve assembly 18 is replaced by avalve assembly 16" similar to 16' as described above but theflow valve assembly 16 is split into upper and lower valve assemblies 16a and 16b, respectively adjacent upper and lower portions of the radiator connected by apipe 130. The main control valve 20 (thermostatic or manual) is provided in the upper valve assembly 16a, and the remainder of the flow paths are provided in the lower valve assembly 16b, as indicated by the arrows in Figure 7. - The valve assembly 16b (Figure 7) comprises a
pipe connector 132 connected horizontally to theradiator 10 and vertically to thepipe 130. The valve assembly also comprises abody portion 134 abutting a sealingring 136 between thepipe connector 132 and thebody portion 134; thebody portion 134 is connected to theflow line 12 by inlet and outlet bores 135, 137. An elongated screw member 138 is screwed into thepipe connector 132 and secures thebody portion 134 to thepipe connector 132. A sealing ring 140 is provided between ahead 139 of the screw member 138 and thebody portion 134. It will be realized that loosening of the screw member 138 permits adjustment of thebody portion 134 relative to thepipe connector 132 about the axis of thebody portion 134 according to skirting requirements etc. - In the modification of Figure 8 the
flow line 12 leads as a branch off a mainvertical flow line 212 serving e.g. several floors of a multi-storey building with branch flow lines at each floor; and similarly thereturn line 14 leads as a branch to a mainvertical return line 214. In this case it will be noted that the water flows concurrently along the flow and returnlines bore 73 of thevalve assembly 16 of theright hand radiator 10 is blanked off, as is thebore 33 of theleft hand radiator 10. - Other branch flow and return lines (not shown) may be run off in parallel flow connection with the
lines - In the modification of Figure 9, the
return line 14 in passing from oneradiator 10 to the next passes through apipe loop 314 which is located in a horizontal plane below floor level to provide heating through the floor surface. - It will be noted here that closing of the
control valves 20 does not result in shutdown of thefloor heating loops 314, which therefore remain as continuous background heating while the thermostatically controlled radiators act as a fine adjustment. - In the modification of Figure 10 the
bore 33 of eachreturn valve assembly 18 is connected to thei return line 14 via a floorheating pipe loop 414 and acommon manifold 416. In this case thebores 31 are all blanked off. - It will be noted that in this case the
floor heating loops 414 are controlled by thecontrol valves 20 and will shut off with the radiators; eachloop 414 being controlled with itsown radiator 10 independently of theother loops 14 and their radiators. - Plastic pipework is normally used for the floor heating loops and accordingly it is convenient to use it also for the radiator connections in the modifications of Figures 9 and 10.
Claims (9)
1. Space heating apparatus adapted to be connected in a central heating system of the double line fluid flow type, the apparatus comprising a space heating unit (e.g. a radiator (10) of the hot water type), a flow valve assembly (16) adapted to connect the heating unit (10) to a flow line (12) of the central heating system, and a return valve assembly (18) adapted to connect the heating unit to a return line (14) of the central heating system; each valve assembly (16, 18) comprising a bypass passage (91, 51) series-connectible to the flow or return line (12, 14) respectively, and a branch passage (61, 59, 60; 30, 29, 27) connecting the bypass passage (91, 51) to the heating unit (10), characterised in that the return valve assembly (18) is separate from the flow valve assembly (16), and each valve assembly (16, 18) comprises a housing portion which is elongated along an axis (e.g. the axis of a lower horizontal radiator duct (11)) about which the valve assembly (16, 18) is mechanically secured to the heating unit (10) and in which elongated portion is provided the bypass passage (91, 51).
2. Apparatus according to claim 1, wherein the branch passage comprises an end portion (60, 30) which is directly mechanically secured to the heating unit (10); is provided in said elongated housing portion coaxially with the bypass passage (91, 51), which extends along said axis; and is isolated from the bypass passage by a transverse barrier (89, 49).
3. Apparatus according to claim 1 or claim 2, wherein, in the return valve assembly (18), the branch passage comprises a portion (27) which extends in the housing parallel to the bypass passage (51), a control valve member (37) being provided to vary the flow from said portion (27) of the branch passage into the bypass passage (51) in the operation of the valve assembly.
4. Apparatus according to claim 1, wherein, in the flow valve assembly (16a, 16b), the elongated housing portion is located adjacent a lower portion of the heating unit and the branch passage comprises a portion (130) which extends from the housing to a control valve (20) adjacent an upper portion of the heating unit and arranged to vary the flow from the branch passage into the heating unit.
5. A flow or return valve assembly adapted for use in apparatus according to any one of claims 1, 2 and 3, the valve assembly comprising a bypass passage (91, 51), series connectible to the flow or return line (12, 14) and a branch passage (61, 59, 60; 30, 29, 27) adapted to connect the bypass passage (91, 51) to the heating unit (10), characterised in that the valve assembly comprises a housing portion which is elongated along an axis (e.g. the axis of a lower horizontal radiator duct (11)) about which the valve assembly (16, 18) is mechanically securable to the heating unit (10), the bypass passage (91, 51) is provided in the elongated portion and extends along said axis; and the branch passage comprises an end portion (60, 30) which is directly mechanically securable to the heating unit (10), is provided in said elongated housing portion coaxially with the bypass passage (91, 51), and is isolated from the bypass passage (91, 51) by a fixed transverse barrier (89, 49).
6. A return valve assembly according to claim 5, wherein the branch passage comprises a portion (27) which extends in the housing parallel to the bypass passage (51), a control valve member being provided to vary the flow from said portion (27) into the bypass passage (51) in the operation of the valve assembly.
7. A double line central heating system comprising a plurality of heating units (10), flow valve assemblies (16) and return valve assemblies (18) according to any one of claims 1, 2, 3 and 4.
8. A double line central heating system according to claim 7, wherein the flow and return lines (12, 14) to which the valve assemblies (18, 16) are connected are of flexible tubing (e.g. of soft thin-walled copper or steel or of plastics) with all joints (which are e.g. compression joints) readily accessible.
9. A double line central heating system according to claim 7 or claim 8, wherein in the operation of the system continuous fluid circulation is maintained by appropriate connection of the bypass passage (91) of a flow valve assembly (16) to the bypass passage (51) of a return valve assembly (18).
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB838317445A GB8317445D0 (en) | 1983-06-28 | 1983-06-28 | Flow systems |
GB8317445 | 1983-06-28 | ||
GB838321990A GB8321990D0 (en) | 1983-06-28 | 1983-08-16 | Flow systems |
GB8321990 | 1983-08-16 | ||
GB838325311A GB8325311D0 (en) | 1983-06-28 | 1983-09-21 | Central heating systems |
GB8325311 | 1983-09-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0130075A2 true EP0130075A2 (en) | 1985-01-02 |
EP0130075A3 EP0130075A3 (en) | 1985-02-06 |
Family
ID=27262150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84304282A Withdrawn EP0130075A3 (en) | 1983-06-28 | 1984-06-25 | Space heating apparatus and valve assemblies therefor |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0130075A3 (en) |
DK (1) | DK314884A (en) |
ES (1) | ES533759A0 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1562007A2 (en) * | 2004-01-23 | 2005-08-10 | Herz Armaturen Ges.m.b.H. | Connection fitting |
EP1607694A1 (en) * | 2004-06-07 | 2005-12-21 | Herz Armaturen Ges.m.b.H. | Connection fitting |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2307056A1 (en) * | 1973-02-13 | 1974-08-29 | Kaeuffer & Co Gmbh | RADIATOR VALVE ARRANGEMENT FOR TWO-PIPE CENTRAL HEATING SYSTEMS |
-
1984
- 1984-06-25 EP EP84304282A patent/EP0130075A3/en not_active Withdrawn
- 1984-06-27 ES ES533759A patent/ES533759A0/en active Granted
- 1984-06-27 DK DK314884A patent/DK314884A/en not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2307056A1 (en) * | 1973-02-13 | 1974-08-29 | Kaeuffer & Co Gmbh | RADIATOR VALVE ARRANGEMENT FOR TWO-PIPE CENTRAL HEATING SYSTEMS |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1562007A2 (en) * | 2004-01-23 | 2005-08-10 | Herz Armaturen Ges.m.b.H. | Connection fitting |
EP1562007A3 (en) * | 2004-01-23 | 2005-11-16 | Herz Armaturen Ges.m.b.H. | Connection fitting |
EP1607694A1 (en) * | 2004-06-07 | 2005-12-21 | Herz Armaturen Ges.m.b.H. | Connection fitting |
Also Published As
Publication number | Publication date |
---|---|
DK314884D0 (en) | 1984-06-27 |
ES8507673A1 (en) | 1985-09-01 |
EP0130075A3 (en) | 1985-02-06 |
DK314884A (en) | 1984-12-29 |
ES533759A0 (en) | 1985-09-01 |
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