GB2328491A - Thermostatic filling and backwash valve - Google Patents
Thermostatic filling and backwash valve Download PDFInfo
- Publication number
- GB2328491A GB2328491A GB9717716A GB9717716A GB2328491A GB 2328491 A GB2328491 A GB 2328491A GB 9717716 A GB9717716 A GB 9717716A GB 9717716 A GB9717716 A GB 9717716A GB 2328491 A GB2328491 A GB 2328491A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- thermostatic
- water
- tank
- filling
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices or arrangements for removing water, minerals or sludge from boilers ; Arrangement of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/486—Devices for removing water, minerals or sludge from boilers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
A thermostatic filling and backwash valve assembly comprises a valve body 10 fitted with a protruding water inlet 12, with the drain connection 14 discharging to an open drainage receptacle. Water flows through inlet 12 into the tank in the direction shown and creates a vacuum at the discharge connection 14, prohibiting water discharging directly to drain. When the flow ceases from inlet 12 the water in the tank "backwashes" to discharge connection 14. The "fill and backwash" cycle continues until the heat generated by the machine reaches a pre-set temperature, which activates a localised or remote sensing device and causes the valve to close. When steam generation has ceased and the temperature drops, the same localised or remote sensor will cause the valve to open allowing the tank to drain automatically.
Description
THERMOSTATIC FILLING AND BACKWASH VALVE
This invention relates to a thermostatic filling and backwash valve.
The generation of steam causes the solids in the water to build-up within the generator equipment. It is known that if water is regularly drained from the steam generator tank and replaced with clean fresh water the forming of scale can be reduced. This has been achieved in the past by electronic or electro-mechanical methods.
The present invention facilitates the operation with neither electromechanical means or electronic circuitry.
The invention is the adaptation of a thermostatic valve fitted with a protruding water inlet to the upstream end of the valve.
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing in which:
Figure 1 shows a cut-away section of the valve indicating flow directions;
Figure 2 shows an elevation of the valve and water inlet.
Referring to the drawing the assembly consists of the valve body 10 fitted with a protruding water inlet 12. The drain connection 14 discharges to an open drainage receptacle.
When water is flowing through inlet 12 into the tank in the direction shown, a vacuum is created at the discharge connection 14. This prohibits water flowing to the discharge connection 14. When the flow ceases from inlet 12 the water in the tank "backwashes" to discharge connection 14. The "fill and backwash" cycle continues until the heat generated by the machine reaches a pre-set temperature, which activates a localised or remote sensing device and causes the valve to close.
When steam generation has ceased, and the localised or remote sensor detects the temperature drop, the valve will open allowing the tank to drain automatically.
Claims (4)
1. A thermostatic filling and backwash valve comprising a thermostatic
valve fitted with a protruding water inlet.
2. A thermostatic filling and backwash valve as claimed in claim 1 wherein
a localised temperature sensor is provided.
3. A thermostatic filling and backwash valve as claimed in claim 1 wherein
a remote temperature sensor is provided.
4. A thermostatic filling and backwash valve substantially as described
herein with reference to Figures 1 and 2 of the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9717716A GB2328491A (en) | 1997-08-22 | 1997-08-22 | Thermostatic filling and backwash valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9717716A GB2328491A (en) | 1997-08-22 | 1997-08-22 | Thermostatic filling and backwash valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9717716D0 GB9717716D0 (en) | 1997-10-29 |
| GB2328491A true GB2328491A (en) | 1999-02-24 |
Family
ID=10817821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9717716A Withdrawn GB2328491A (en) | 1997-08-22 | 1997-08-22 | Thermostatic filling and backwash valve |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2328491A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB324843A (en) * | 1929-03-05 | 1930-02-06 | Mosinee Paper Mills Co | Improvements in apparatus for blowing scum and sediment from steam boilers |
| GB2099556A (en) * | 1981-05-29 | 1982-12-08 | Williams Gerald Austen | Electrode steam boiler |
| EP0092333A1 (en) * | 1982-04-06 | 1983-10-26 | Actrol Industries Pty. Ltd | Valve and system incorporating same |
-
1997
- 1997-08-22 GB GB9717716A patent/GB2328491A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB324843A (en) * | 1929-03-05 | 1930-02-06 | Mosinee Paper Mills Co | Improvements in apparatus for blowing scum and sediment from steam boilers |
| GB2099556A (en) * | 1981-05-29 | 1982-12-08 | Williams Gerald Austen | Electrode steam boiler |
| EP0092333A1 (en) * | 1982-04-06 | 1983-10-26 | Actrol Industries Pty. Ltd | Valve and system incorporating same |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9717716D0 (en) | 1997-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |