EP2288761A1 - Apparatus to pressurise mains water supply - Google Patents

Apparatus to pressurise mains water supply

Info

Publication number
EP2288761A1
EP2288761A1 EP09731605A EP09731605A EP2288761A1 EP 2288761 A1 EP2288761 A1 EP 2288761A1 EP 09731605 A EP09731605 A EP 09731605A EP 09731605 A EP09731605 A EP 09731605A EP 2288761 A1 EP2288761 A1 EP 2288761A1
Authority
EP
European Patent Office
Prior art keywords
water
pump
pressure
outlet
non 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.)
Granted
Application number
EP09731605A
Other languages
German (de)
French (fr)
Other versions
EP2288761B1 (en
Inventor
Paul Gardner
Brian Tapp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2288761A1 publication Critical patent/EP2288761A1/en
Application granted granted Critical
Publication of EP2288761B1 publication Critical patent/EP2288761B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/075—Arrangement of devices for control of pressure or flow rate
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B1/00—Methods or layout of installations for water supply
    • E03B1/04—Methods or layout of installations for water supply for domestic or like local supply
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B5/00—Use of pumping plants or installations; Layouts thereof
    • E03B5/02—Use of pumping plants or installations; Layouts thereof arranged in buildings
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/04—Domestic or like local pipe systems
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks

Definitions

  • the present invention relates to an apparatus to pressurise mains water supply.
  • the invention relates to an apparatus for increasing the flow rate of water supplied to a water delivery pipe system above the flow rate achieved using mains water alone comprising: a) a water inlet for connection to a mains water supply; b) a water outlet for connection to a water delivery pipe system; c) a first non return valve and a pressure limiting valve in series between the water inlet and the water outlet; and d) a loop for pressurising the water comprising: i) a loop inlet connected between the water inlet and first non return valve; ii) a loop outlet connected between the first non return valve and the pressure limiting valve; iii) a second non return valve connected in series to a pump, and an expansion vessel ; in use water at mains pressure enters the water inlet, the water is pressurised by the pump and a positive pressure develops across the pressure limiting valve, the pressurised water is then delivered to the water outlet at a flow rate which exceeds the flow rate achieved using the mains water supply pressure.
  • the invention in a second aspect relates to apparatus wherein the first non return valve allows water to flow from the water inlet to the water outlet through the pressure limiting valve directly if the loop for pressurising the water fails.
  • the invention relates to apparatus wherein a pressure sensor senses the pressure of the water in the expansion vessel and turns the pump on when the pressure falls below a first lower value and turns the pump off when the pressure reaches a second upper value.
  • the invention relates to apparatus wherein the upper value is between 8 and 10 Bar.
  • the invention relates to apparatus wherein the upper value is selected to deliver water to the outlet at a flow rate of more than 10 lit/min.
  • the invention relates to apparatus wherein the upper value is selected to deliver water to the outlet at a flow rate which exceeds the inlet flow rate.
  • the invention relates to apparatus wherein the lower value is 3.8 Bar
  • the invention relates to apparatus wherein the pressure sensor senses the pressure of the water downstream of the pump.
  • the invention relates to apparatus wherein an air vent is provided upstream of the pump for removing air to prevent cavitation in the pump.
  • the invention relates to apparatus wherein the pump is driven by a linear motor.
  • the invention relates to apparatus wherein the pump is a rotary vane pump.
  • the invention relates to apparatus wherein the loop for pressurising the water further comprises a pump temperature sensor and a pump controller to turn the pump off if the pump temperature rises above a pre-determined level.
  • the invention relates to apparatus wherein the water inlet, water outlet, first non return valve pressure limiting valve, and the loop for pressurising the water are connected by pipes formed in a common housing or manifold.
  • Figure 1 shows a schematic circuit diagram
  • Figure 2 shows a cross section view of a manifold.
  • FIG. 1 there is shown a schematic circuit of an apparatus 1 to pressurise mains water and to supply it at a consistent flow rate which exceeds that provided by the mains supply to a water delivery pipe system, e.g. the cold mains water pipe system in a building.
  • a water delivery pipe system e.g. the cold mains water pipe system in a building.
  • a water inlet 2 is provided for connection to a mains water supply with isolation valve 2A, as is a water outlet 3 for connection to a water delivery pipe system with an isolation valve 3A.
  • a first non return valve 4 and pressure limiting valve 5 are provided in series between the water inlet 2 and the water outlet 3.
  • a loop 10 for pressurising the water has a loop inlet 1OA connected between the water inlet 2 and first non return valve 4, and a loop outlet 1OB connected between the first non return valve 4 and the pressure limiting valve 5.
  • the loop 10 has a second non return valve 11 connected in series to a pressurising pump 12, with isolation valves 12A,12B being provided for the pump 12.
  • An automatic air vent 13 is provided upstream of the pump 12 and a pressure sensor 14 is provided downstream of the pump 12.
  • One or more expansion vessel 15 is connected on a branch pipe 15 A between the pressuring pump 12 and pressure limiting valve 5.
  • An isolation valve 15B is provided in branch pipe 15A.
  • a pump controller 16 is connected to pressure sensor 14 and pump 12.
  • mains water enters via inlet 2 and isolation valve 2A.
  • Water passes through second non return valve 11 to pump 12 which pressurises the water from the available mains water pressure to around 8 Bar and fills and pressurises the expansion vessel 15 to maintain a positive pressure across the pressure limiting valve 5 at a pressure above the mains water supply pressure. Any air in the water is removed by the automatic air vent 13 to prevent cavitation in pump 12.
  • Pressure sensor 14 senses the water pressure downstream of the pump and, with controller 16, turns the pump 12 on when the pressure falls below a first lower value (e.g. around 3.8 Bar) which is the desired service pressure, and turns the pump off when the pressure exceeds a second upper value (e.g. around 8-10 Bar) which is the desired maximum pressure.
  • a first lower value e.g. around 3.8 Bar
  • a second upper value e.g. around 8-10 Bar
  • the pressure limiting valve controls the flow rate of water which is delivered to the water delivery pipe system.
  • the outlet pressure ie the pressure of water which is delivered to the water delivery pipe system, is lower than the upper value.
  • the invention ensures that a consistent flow rate of water which exceeds that available from the mains is delivered to the water delivery pipe system.
  • the pressure in the expansion vessel is more than IBar and delivers water to the water delivery pipe system at a flow rate of more thanlOlit/min. More preferably the pressure in the expansion vessel is more than 3.5Bar and delivers water to the delivery pipe system at flow rates of between 36 and 300 lit/min depending on the application and the size of the delivery pipe.
  • the pressure in the expansion vessel is between 7.8 and 8 Bar which compresses the air in the expansion vessel and increases the volume of water which can be stored in the expansion vessel to between 70-90% of the expansion vessel's volume.
  • the pump is a peripheral pump or more preferably a rotary vane pump in which all parts are floating and self lubricating.
  • the pump motor is a conventional electric motor or more preferably a linear motor which has no moving parts as they are quiet and very efficient.
  • the pump is a rotary vane pump and the motor is a linear motor.
  • the first non return valve 4 allows water to flow directly from the water inlet to the water outlet through the first pressure limiting valve 5 to the water delivery pipe system, albeit only at mains water pressure.
  • first non return valve 4 prevents flow of pressurised water back to the mains supply.
  • a pump temperature sensor 17 is connected to the controller 16 to turn off the pump if the pump temperature rises above a predetermined level. This might occur in the event of no water flowing through the pump, e.g. due to a closed valve or there being no water available.
  • a pressure sensor which is able to detect pressures below zero is provided on the inlet side of the pump which turns the pump off if the pressure falls below a preset level to protect the pump in the event of a failure in the water inlet.
  • the system automatically resets once water pressure is restored.
  • a mechanical sensor is provided which turns the pump off if the pressure exceeds a preset level to protect the system from becoming over-pressurised.
  • a visual pressure gauge 18 is provided between the first non return valve 4 and pressure limiting valve 5. This may also be a digital device displayed on controller 16.
  • the digital device may also have means to indicate when one or more of the following
  • the water inlet 2, water outlet 3, first non return valve 4 and pressure limiting valve 5, and the bypass loop for pressurising the water comprising the second non return valve 11 and the pressurising pump 12, and an expansion vessel 15 are connected by pipes formed in a common housing or manifold.
  • a schematic cross-section of such a manifold is shown in Figure
  • a manifold is formed from three joined blocks 2OA, 2OB, 20C.
  • the blocks create a network of pipes with apertures connected to the various components as shown. Water flow direction is shown by the dotted arrows.
  • First and second non return valves 4, and 11 may be integrated with the pipe work as shown.
  • the air vent 13, pressure sensor 14 and pressure gauge 18, and pressure limiting valve 5 may be screwed into threaded apertures on the block 2OA, 20B, 2OC.
  • a manifold would be sold containing the first and second non return valves 4,11, the air vent 13, the pressure sensor 14, the pressure gauge 18, and the pressure limiting valve 5.
  • the end user would connect the pump and expansion vessel to the manifold at the point of installation.
  • the pump, controller and manifold arrangement are sold as a single pre-assembled unit, optionally incorporated in a sound insulated housing, for the user to connect to the inlet, outlet and expansion vessel or vessels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to apparatus for pressurising mains water supply to a water delivery pipe system comprising: a) a water inlet (2) for connection to a mains water supply; b) a water outlet (3) for connection to a water delivery pipe system; c) a first non return valve (4) and a pressure limiting valve (5) in series between the water inlet (2) and water outlet (3); and d) a loop (10) for pressurising the water comprising: i) a loop (10A) inlet connected between the water inlet (2) and first non return valve (4); ii) a loop outlet (10A) connected between the first non return valve (4) and the pressure limiting valve (5); iii) a second non return valve (11) connected in series to a pump (12), and an expansion vessel (15); in use water at mains pressure enters the water inlet ("), the water is pressurised by the pump (12) and a positive pressure develops across the pressure limiting valve (5) and the pressurised water is delivered to the water outlet (3) at a pressure which exceeds the mains water supply pressure.

Description

Title: Apparatus to pressurise mains water supply
The present invention relates to an apparatus to pressurise mains water supply.
In an attempt to reduce the number of leaks some water suppliers have reduced the pressure of the mains water supply. New developments where the water is delivered in series with existing dwellings or businesses may cause the pressure of the mains water supply to be even lower. Accordingly the pressure and flow at which water is delivered to many end users is unacceptably low.
A need exists for a fail-safe means of simply, reliably and cost-effectively increasing the flow rate at which water reaches the end user. It is a further object of the invention to provide a means of evening out fluctuations in the mains pressure so that a reliable, consistent flow rate and pressure reaches the end user.
The invention relates to an apparatus for increasing the flow rate of water supplied to a water delivery pipe system above the flow rate achieved using mains water alone comprising: a) a water inlet for connection to a mains water supply; b) a water outlet for connection to a water delivery pipe system; c) a first non return valve and a pressure limiting valve in series between the water inlet and the water outlet; and d) a loop for pressurising the water comprising: i) a loop inlet connected between the water inlet and first non return valve; ii) a loop outlet connected between the first non return valve and the pressure limiting valve; iii) a second non return valve connected in series to a pump, and an expansion vessel ; in use water at mains pressure enters the water inlet, the water is pressurised by the pump and a positive pressure develops across the pressure limiting valve, the pressurised water is then delivered to the water outlet at a flow rate which exceeds the flow rate achieved using the mains water supply pressure.
In a second aspect the invention relates to apparatus wherein the first non return valve allows water to flow from the water inlet to the water outlet through the pressure limiting valve directly if the loop for pressurising the water fails.
In a further aspect the invention relates to apparatus wherein a pressure sensor senses the pressure of the water in the expansion vessel and turns the pump on when the pressure falls below a first lower value and turns the pump off when the pressure reaches a second upper value. In a further aspect the invention relates to apparatus wherein the upper value is between 8 and 10 Bar.
In a further aspect the invention relates to apparatus wherein the upper value is selected to deliver water to the outlet at a flow rate of more than 10 lit/min.
In a fUrther aspect the invention relates to apparatus wherein the upper value is selected to deliver water to the outlet at a flow rate which exceeds the inlet flow rate.
In a further aspect the invention relates to apparatus wherein the lower value is 3.8 Bar
In a further aspect the invention relates to apparatus wherein the pressure sensor senses the pressure of the water downstream of the pump.
In a further aspect the invention relates to apparatus wherein an air vent is provided upstream of the pump for removing air to prevent cavitation in the pump.
In a farther aspect the invention relates to apparatus wherein the pump is driven by a linear motor.
In a further aspect the invention relates to apparatus wherein the pump is a rotary vane pump. In a further aspect the invention relates to apparatus wherein the loop for pressurising the water further comprises a pump temperature sensor and a pump controller to turn the pump off if the pump temperature rises above a pre-determined level.
In a further aspect the invention relates to apparatus wherein the water inlet, water outlet, first non return valve pressure limiting valve, and the loop for pressurising the water are connected by pipes formed in a common housing or manifold.
Description of the Drawings
An embodiment of the invention will now be described with reference to the accompanying drawings in which:
Figure 1 shows a schematic circuit diagram and
Figure 2 shows a cross section view of a manifold.
Referring to Figure 1 there is shown a schematic circuit of an apparatus 1 to pressurise mains water and to supply it at a consistent flow rate which exceeds that provided by the mains supply to a water delivery pipe system, e.g. the cold mains water pipe system in a building.
A water inlet 2 is provided for connection to a mains water supply with isolation valve 2A, as is a water outlet 3 for connection to a water delivery pipe system with an isolation valve 3A.
A first non return valve 4 and pressure limiting valve 5 are provided in series between the water inlet 2 and the water outlet 3. A loop 10 for pressurising the water has a loop inlet 1OA connected between the water inlet 2 and first non return valve 4, and a loop outlet 1OB connected between the first non return valve 4 and the pressure limiting valve 5. The loop 10 has a second non return valve 11 connected in series to a pressurising pump 12, with isolation valves 12A,12B being provided for the pump 12. An automatic air vent 13 is provided upstream of the pump 12 and a pressure sensor 14 is provided downstream of the pump 12.
One or more expansion vessel 15 is connected on a branch pipe 15 A between the pressuring pump 12 and pressure limiting valve 5. An isolation valve 15B is provided in branch pipe 15A.
A pump controller 16 is connected to pressure sensor 14 and pump 12.
In use mains water enters via inlet 2 and isolation valve 2A. Water passes through second non return valve 11 to pump 12 which pressurises the water from the available mains water pressure to around 8 Bar and fills and pressurises the expansion vessel 15 to maintain a positive pressure across the pressure limiting valve 5 at a pressure above the mains water supply pressure. Any air in the water is removed by the automatic air vent 13 to prevent cavitation in pump 12.
Pressure sensor 14 senses the water pressure downstream of the pump and, with controller 16, turns the pump 12 on when the pressure falls below a first lower value (e.g. around 3.8 Bar) which is the desired service pressure, and turns the pump off when the pressure exceeds a second upper value (e.g. around 8-10 Bar) which is the desired maximum pressure.
The pressure limiting valve controls the flow rate of water which is delivered to the water delivery pipe system. The outlet pressure, ie the pressure of water which is delivered to the water delivery pipe system, is lower than the upper value.
The invention ensures that a consistent flow rate of water which exceeds that available from the mains is delivered to the water delivery pipe system.
Preferably the pressure in the expansion vessel is more than IBar and delivers water to the water delivery pipe system at a flow rate of more thanlOlit/min. More preferably the pressure in the expansion vessel is more than 3.5Bar and delivers water to the delivery pipe system at flow rates of between 36 and 300 lit/min depending on the application and the size of the delivery pipe.
More preferably the pressure in the expansion vessel is between 7.8 and 8 Bar which compresses the air in the expansion vessel and increases the volume of water which can be stored in the expansion vessel to between 70-90% of the expansion vessel's volume.
Preferably the pump is a peripheral pump or more preferably a rotary vane pump in which all parts are floating and self lubricating. Preferably the pump motor is a conventional electric motor or more preferably a linear motor which has no moving parts as they are quiet and very efficient.
In an especially preferred embodiment the pump is a rotary vane pump and the motor is a linear motor.
In the event that the pump 12 or expansion vessel 15 should fail, the first non return valve 4 allows water to flow directly from the water inlet to the water outlet through the first pressure limiting valve 5 to the water delivery pipe system, albeit only at mains water pressure. Thus providing a fail-safe system.
It will be appreciated that, when pressure in expansion vessel 15 is higher than mains pressure, first non return valve 4 prevents flow of pressurised water back to the mains supply.
A pump temperature sensor 17 is connected to the controller 16 to turn off the pump if the pump temperature rises above a predetermined level. This might occur in the event of no water flowing through the pump, e.g. due to a closed valve or there being no water available.
In an alternative embodiment a pressure sensor which is able to detect pressures below zero is provided on the inlet side of the pump which turns the pump off if the pressure falls below a preset level to protect the pump in the event of a failure in the water inlet.
Preferably the system automatically resets once water pressure is restored. In an alternative embodiment a mechanical sensor is provided which turns the pump off if the pressure exceeds a preset level to protect the system from becoming over-pressurised.
If any one of the temperature or pressure sensors is activated a manual re-setting operation may be required.
A visual pressure gauge 18 is provided between the first non return valve 4 and pressure limiting valve 5. This may also be a digital device displayed on controller 16.
The digital device may also have means to indicate when one or more of the following
a) System on and functioning b) The pump is running c) Manual Reset required eg. because of overpressure failure
Preferably the water inlet 2, water outlet 3, first non return valve 4 and pressure limiting valve 5, and the bypass loop for pressurising the water comprising the second non return valve 11 and the pressurising pump 12, and an expansion vessel 15 are connected by pipes formed in a common housing or manifold. A schematic cross-section of such a manifold is shown in Figure
2. In Figure 2 a manifold is formed from three joined blocks 2OA, 2OB, 20C. The blocks create a network of pipes with apertures connected to the various components as shown. Water flow direction is shown by the dotted arrows. First and second non return valves 4, and 11 may be integrated with the pipe work as shown. The air vent 13, pressure sensor 14 and pressure gauge 18, and pressure limiting valve 5 may be screwed into threaded apertures on the block 2OA, 20B, 2OC.
It is envisaged that a manifold would be sold containing the first and second non return valves 4,11, the air vent 13, the pressure sensor 14, the pressure gauge 18, and the pressure limiting valve 5. The end user would connect the pump and expansion vessel to the manifold at the point of installation. More commonly the pump, controller and manifold arrangement are sold as a single pre-assembled unit, optionally incorporated in a sound insulated housing, for the user to connect to the inlet, outlet and expansion vessel or vessels.

Claims

Claims:
1. An apparatus for increasing the flow rate of water supplied to a water delivery pipe system above the flow rate achieved using mains water alone comprising: a) a water inlet for connection to a mains water supply; b) a water outlet for connection to a water delivery pipe system; c) a first non return valve and a pressure limiting valve in series between the water inlet and the water outlet; and d) a loop for pressurising the water comprising: i) a loop inlet connected between the water inlet and first non return valve; ii) a loop outlet connected between the first non return valve and the pressure limiting valve; iii) a second non return valve connected in series to a pump, and an expansion vessel ; in use water at mains pressure enters the water inlet, the water is pressurised by the pump and a positive pressure develops across the pressure limiting valve, the pressurised water is then delivered to the water outlet at a flow rate which exceeds the flow rate achieved using the mains water supply pressure.
2. An apparatus as claimed in claim 1 wherein the first non return valve allows water to flow from the water inlet to the water outlet through the pressure limiting valve directly if the loop for pressurising the water fails.
3. An apparatus as claimed in claim 1 or claim 2 wherein a pressure sensor senses the pressure of the water in the expansion vessel and turns the pump on when the pressure falls below a first lower value and turns the pump off when the pressure reaches a second upper value.
4. An apparatus as claimed in claim 3 wherein the upper value is between 8 and 10 Bar.
5. An apparatus as claimed in claim 3 or claim 4 wherein the upper value is selected to deliver water to the outlet at a flow rate of more than 10 lit/min.
6. An apparatus as claimed in any one of claims 3 to 5 wherein the upper value is selected to deliver water to the outlet at a flow rate which exceeds the inlet flow rate.
7. An apparatus as claimed in claim 3, 4 or 5 wherein the lower value is 3.8 Bar
8. An apparatus as claimed in any one of claims 3 to 7 wherein the pressure sensor senses the pressure of the water downstream of the pump.
9. An apparatus as claimed in any preceding claim wherein an air vent is provided upstream of the pump for removing air to prevent cavitation in the pump.
10. An apparatus as claimed in any preceding claim wherein the pump is driven by a linear motor.
11. An apparatus as claimed in any preceding claim wherein the pump is a rotary vane pump.
12. An apparatus as claimed in any preceding claim wherein the loop for pressurising the water further comprises a pump temperature sensor and a pump controller to turn the pump off if the pump temperature rises above a pre-determined level.
13. An apparatus as claimed in any preceding claim wherein the water inlet, water outlet, first non return valve pressure limiting valve, and the loop for pressurising the water are connected by pipes formed in a common housing or manifold.
EP09731605.3A 2008-04-17 2009-04-16 Apparatus to pressurise mains water supply Not-in-force EP2288761B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0806976A GB2459155A (en) 2008-04-17 2008-04-17 Apparatus for increasing the flow rate of water in a delivery pipe system
PCT/EP2009/054569 WO2009127710A1 (en) 2008-04-17 2009-04-16 Apparatus to pressurise mains water supply

Publications (2)

Publication Number Publication Date
EP2288761A1 true EP2288761A1 (en) 2011-03-02
EP2288761B1 EP2288761B1 (en) 2015-08-26

Family

ID=39472244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09731605.3A Not-in-force EP2288761B1 (en) 2008-04-17 2009-04-16 Apparatus to pressurise mains water supply

Country Status (3)

Country Link
EP (1) EP2288761B1 (en)
GB (1) GB2459155A (en)
WO (1) WO2009127710A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130014843A1 (en) * 2009-12-17 2013-01-17 Alan Derek Wright Pressure enhancing device
WO2014159710A1 (en) 2013-03-13 2014-10-02 Merit Medical Systems, Inc. Serially deposited fiber materials and associated devices and methods
WO2015100502A1 (en) * 2014-01-03 2015-07-09 Massachusetts Institute Of Technology Self-throttling valves for residential water supply systems
CN106088215A (en) * 2016-08-11 2016-11-09 安徽海沃特水务股份有限公司 A kind of non-negative pressure water service system and control method
CN107201768A (en) * 2017-06-22 2017-09-26 合肥佳洋电子科技有限公司 A kind of intelligent water supply system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2031502B (en) 1978-10-11 1982-10-13 Amtrol Inc Water pressure booster system and control valve therefor
CN2312254Y (en) * 1997-09-16 1999-03-31 张明亮 Non-suction height type pipeline and its water supply equipment set
US7077160B1 (en) * 2003-08-15 2006-07-18 Ratz Werner K Water pressure pump

Non-Patent Citations (1)

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Title
See references of WO2009127710A1 *

Also Published As

Publication number Publication date
GB2459155A (en) 2009-10-21
GB0806976D0 (en) 2008-05-21
EP2288761B1 (en) 2015-08-26
WO2009127710A1 (en) 2009-10-22

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