DESC:
FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003

COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. Title of the Invention
VALVE ASSEMBLY FOR FLOAT OPERATED DEVICES
2. Applicant(s)
Name Nationality Address
FORBES MARSHALL PRIVATE LIMITED Indian A 34/35, MIDC, H BLOCK,PIMPRI, PUNE-411018, MAHARASHTRA, India
3. Preamble to the description

The following specification particularly describes the invention and the manner in which it is to be performed

FIELD
The present disclosure relates to float-operated condensate removal devices.
DEFINITION
As used in the present disclosure, the following terms are generally intended to have the meaning as set forth below, except to the extent that the context in which they are used indicate otherwise.
The term “motive fluid” refers to a high-pressure fluid used to produce flow of another fluid.
BACKGROUND
The background information herein below relates to the present disclosure but is not necessarily prior art.
Devices which are capable of operating when the pressure on the upstream of the device is greater than the pressure at the downstream of the device, are known as steam traps, whereas, devices which are capable of operating both, when the upstream pressure is greater as well as when it is lower than the downstream pressure are known as condensate pumping traps. Both these devices have a common function of allowing only to discharge condensate while arresting the flow of steam. Hence, float-operated condensate removal devices include steam traps, condensate pumps and condensate pumping traps.
Conventional condensate pumps run intermittently, and condensate accumulates in the shell of a condensate pump. Eventually, the accumulating liquid raises a float which energizes the pumping mechanism. The pump then runs until the level of liquid in the tank is substantially lowered. When the available upstream pressure is greater than the downstream pressure, the condensate is removed as soon as it accumulates in the shell of the condensate pump.
The valve assemblies in conventional condensate pumps, pumping traps and steam traps exert more forces while opening the trap orifice, which eventually damages the trap orifice. Thus, the conventional valve assemblies are not able to perform efficiently in the long run.
Therefore, there is felt a need to provide a valve assembly for float-operated condensate removal device that reduces forces on the trap orifice during operation.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows.
An object of the present disclosure is to ameliorate one or more problems of the prior art or to at least provide a useful alternative.
Another object of the present disclosure is to provide a valve assembly for float-operated condensate removal devices.
Yet another object of the present disclosure is to provide a valve assembly for float-operated condensate removal device that reduces forces on the trap orifice.
Still another object of the present disclosure is to provide a valve assembly for float-operated condensate removal device with simple methods to reduce forces on the trap orifice.
Still yet another object of the present disclosure is to provide a valve assembly for float-operated condensate removal device that reduces wear and tear of the trap orifice.
Other objects and advantages of the present disclosure will be more apparent from the following description, which is not intended to limit the scope of the present disclosure.
SUMMARY
The present disclosure envisages a float-operated condensate removal device. The condensate removal device comprises an enclosure, a condensate inlet and a condensate outlet, a motive fluid inlet and a motive fluid outlet, a trap orifice, a buoyant body, and a plurality of levers. The condensate inlet and a condensate outlet are provided on the enclosure. The condensate inlet and the condensate outlet are configured to allow condensate to pass through the enclosure. The motive fluid inlet and the motive fluid outlet are provided within the enclosure. The motive fluid inlet and the motive fluid outlet are configured to allow motive fluid to pass through the enclosure. The trap orifice is configured within the enclosure upstream of the condensate outlet. The plurality of levers is pivotally mounted in the enclosure at a main pivot point. The buoyant body is attached to a lever of the levers. The buoyant body is configured to be displaced due to change in level of condensate accumulated in the enclosure and the weight of the levers is configured to generate moment that is opposite to the moment due to weight of the buoyant body, thereby reducing the force exerted for opening the trap orifice to remove the condensate from the enclosure.
In an embodiment, the plurality of levers includes an orifice valve rod, a float lever, a second lever and a dead weight. The orifice valve rod is configured to be displaced for closing and opening the trap orifice. The float lever is operatively coupled with the orifice valve rod. The float lever is pivotally mounted in the enclosure at the main pivot point, and is configured to pivot for displacing the orifice valve rod. The second lever is pivotally mounted in the enclosure at the main pivot point and configured to engage with the float lever at a predetermined lower level of condensate. The dead weight is rigidly attached to the second lever. Weight of the second lever is configured to generate moment on the float lever that is opposite to the moment due to weight of the buoyant body.
In an embodiment, the condensate removal device includes a dead weight rigidly attached to the second lever.
In an embodiment, the condensate removal device includes a stopper configured to restrict the movement of the second lever beyond a predetermined level in the enclosure.
In an embodiment, the enclosure is formed of a base and a cover.
In an embodiment, the condensate removal device includes check valves provided at inlet and outlet. Each of the check valves is configured to restrict condensate flow in reverse direction in the enclosure.
In an embodiment, the buoyant body is pivotally coupled with the float lever via a main pivot.
In an embodiment, the float lever is configured to close the motive fluid inlet and further configured to open the motive fluid outlet, thereby cutting off the motive fluid supply and allowing motive fluid to vent from the enclosure.
The present disclosure also envisages an alternate embodiment of a float-operated condensate removal device. The condensate removal device comprises an enclosure, a condensate inlet and a condensate outlet, a motive fluid inlet and a motive fluid outlet, a trap orifice, a buoyant body, at least one lever, and spring. The condensate inlet and a condensate outlet provided on the enclosure and configured to allow condensate to pass through the enclosure. The motive fluid inlet and motive fluid outlet provided within the enclosure. The motive fluid inlet and motive fluid outlet are configured to allow motive fluid to pass through the enclosure. The trap orifice is disposed within the enclosure upstream of the condensate outlet. The lever is pivotally mounted in the enclosure at a main pivot point. The buoyant body is attached to a lever of the levers. The buoyant body is configured to be displaced due to change in level of condensate accumulated in the enclosure. The spring with one end thereof grounded on a fixed link and other end of the spring is configured to engage with the lever at a predetermined lower level of condensate and generate moment on the lever that is opposite to the moment due to weight of the buoyant body, thereby reducing the force exerted for opening the trap orifice to remove the condensate from the enclosure.
In an embodiment, one end of the spring is grounded on the fixed link formed by a trap housing and the other end configured to rest on a spring support.
In an embodiment, the device includes a pin passing through the spring and having an inbuilt stopper and an external stopper externally attached to pin. The external stopper is configured to remain in contact with the spring support always, and the inbuilt stopper is configured to touch a fixed support to allow the pin to disengage from the float lever
In an embodiment, the buoyant body at its lower most position allows the spring to generate force that is maximum to ensure maximum resistance to the moment of weight of the buoyant body.
In an embodiment, a plurality of springs is configured to be connected in series or parallel configuration to resist the movement of the buoyant body.
In an embodiment, the plurality of levers includes an orifice valve rod and a float lever. The orifice valve rod is configured to be displaced for closing and opening the trap orifice. The float lever is operatively coupled with the orifice valve rod and is configured to pivot for displacing the orifice valve rod.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
A float-operated condensate removal device of the present disclosure will now be described with the help of the accompanying drawing, in which:
Figure 1 illustrates a sectional view of a float-operated condensate pumping trap in accordance with the present disclosure;
Figure 2 illustrates a condensate inlet of a float-operated condensate removal device of Figure 1;
Figure 3 illustrates a sectional view of a float-operated steam trap of Figure 1;
Figure 4 illustrates a float lever and second lever of a float-operated condensate removal device of Figure 1;
Figure 5 illustrates a float lever and second lever in disengaged position of a float-operated condensate removal device of Figure 1;
Figure 6 illustrates a sectional view of an alternate float-operated condensate pumping traps in accordance with the present disclosure;
Figure 7 illustrates a condensate inlet of the float-operated condensate removal device of Figure 6;
Figure 8 illustrates a sectional view of a float-operated steam trap of Figure 6;
Figure 9 illustrates a float lever and second lever of a float-operated condensate removal device of Figure 6; and
Figure 10 illustrates a float lever and second lever in disengaged position of a float-operated condensate removal device of Figure 6.
LIST OF REFERENCE NUMERALS
100 Float-operated condensate removal device
1 Condensate Inlet
2 Condensate Outlet
3 Base
4 Cover Assembly
5 Motive Fluid Inlet
6 Motive Fluid Outlet
7 Buoyant body
8 First Lever
9 Second Lever
10 Weight
11 Trap orifice
12 Enclosure
13 Trap Housing
14 Spring
15 Spring support
16 Orifice valve rod
17 Pin
18 Fixed support
A Main Pivot
D Inbuilt Stopper
F External Stopper
DETAILED DESCRIPTION
Embodiments, of the present disclosure, will now be described with reference to the accompanying drawing.
Embodiments are provided so as to thoroughly and fully convey the scope of the present disclosure to the person skilled in the art. Numerous details are set forth, relating to specific components, and methods, to provide a complete understanding of embodiments of the present disclosure. It will be apparent to the person skilled in the art that the details provided in the embodiments should not be construed to limit the scope of the present disclosure. In some embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.
The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure. As used in the present disclosure, the forms "a,” "an," and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. The terms "comprises," "comprising," “including,” and “having,” are open-ended transitional phrases and therefore specify the presence of stated features, elements, units and/or components, but do not forbid the presence or addition of one or more other features, elements, components, and/or groups thereof.
As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed elements.
A float-operated condensate removal device 100 of the present disclosure is now described with reference to Figure 1 through Figure 10.
Figures 1-5 illustrate a float-operated condensate removal device 100 in accordance with the present disclosure. The condensate removal device 100 comprises an enclosure 12, a condensate inlet 1 and a condensate outlet 2, a motive fluid inlet 5 and a motive fluid outlet 6, a trap orifice 11, a buoyant body 7, and a plurality of levers 8, 9.
The condensate inlet 1 and the condensate outlet 2 are provided on the enclosure 12. The condensate inlet 1 and the condensate outlet 2 are configured to allow condensate to pass through the enclosure 12. In an embodiment, the enclosure 12 is formed of a base 3 and a cover assembly 4. The inlet and outlet connections for condensate are provided on the base 3 and the cover assembly 4. The cover assembly 4 and the base 3 are connected together to form an enclosure 12.
The motive fluid inlet 5 and the motive fluid outlet 6 are provided within the enclosure 12. The motive fluid inlet 5 and the motive fluid outlet 6 are configured to allow motive fluid, generally steam, to pass through the enclosure 12. In an embodiment, the motive fluid inlet 5 and a motive fluid outlet 6 are provided on the base 3.
The trap orifice 11 is configured within the enclosure 12 upstream of the condensate outlet 2. The plurality of levers 8, 9 is pivotally mounted in the enclosure 12 at a main pivot point A. In an embodiment, the buoyant body 7 is pivotally coupled with the float lever 8 via a main pivot A. The buoyant body 7 is attached to a lever of the levers 8, 9. The buoyant body 7 is configured to be displaced due to change in level of condensate accumulated in the enclosure 12 and the weight of the levers 8, 9 is configured to generate moment that is opposite to the moment due to weight of the buoyant body 7, thereby reducing the force exerted for opening the trap orifice 11 to remove the condensate from the enclosure 12. In an embodiment, the plurality of levers 8, 9 includes an orifice valve rod 16, a float lever 8, and a second lever 9. The orifice valve rod 16 is configured to be displaced for closing and opening the trap orifice 11. The float lever 8 is operatively coupled with the orifice valve rod 16. The float lever 8 is pivotally mounted in the enclosure 12 at the main pivot point A, and is configured to pivot for displacing the orifice valve rod 16. The second lever 9 is pivotally mounted in the enclosure 12 at the main pivot point A and configured to engage with the float lever 8 at a predetermined lower level of condensate. The weight of the second lever 9 is configured to generate moment on the float lever 8 that is opposite to the moment due to weight of the buoyant body 7.
In an embodiment, the buoyant body 7 can be of any shape and is connected pivotally to the main pivot A via a float lever 8 rigidly connected to buoyant body as shown in figure 4 and figure 5. A weight 10 can be of any shape and is attached pivotally to the main pivot A via a second lever 9. The second lever 9 is rigidly connected to a weight 10. The weight 10 applies a force which restricts the augmentation spring force and weight of the buoyant body 7. The buoyant body 7 in its lower most position is acted upon by moment of the weight 10 which opposes the moment due to the weight of the buoyant body 7.
The condensate removal device 100 includes a stopper D configured to restrict the movement of the second lever 9 due to moment exerted by the float lever 8 due to rise in level of condensate in the enclosure 12 beyond a predetermined level of the condensate in the enclosure 12. As illustrated in Figures 4 and 5, the stopper D may be a protrusion provided on the trap housing 13 that engages with a slot provided on the second lever 9 at an angle of inclination of the second lever 9 corresponding to the predetermined level of the condensate at which the float lever 8 must disengage from the second lever 9.
In an embodiment, the condensate removal device 100 includes check valves provided at condensate inlet 1 and condensate outlet 2. Each of the check valves is configured to restrict condensate flow in reverse direction in the enclosure 12. In an embodiment, the float lever 8 is configured to close the motive fluid inlet 5 and is further configured to open the motive fluid outlet 6, thereby cutting off the motive fluid supply and allowing motive fluid to vent from the enclosure 12.
In an operative configuration, when the available upstream pressure is greater than the downstream pressure, as the condensate enters the enclosure 12, the buoyant body 7 along with float lever 8 and second lever 9 starts moving as a single rigid body as shown in Figure 3. This motion results in opening of a trap orifice 11 which connects the condensate to the condensate outlet 2. This single body motion is continued until the second lever 9 reaches the lever second stopper D. When the second lever 9 reaches the lever second stopper D, further motion of the second lever 9 is restricted by the lever second stopper D and just the float lever 8 moves further, as shown in Figure 5. The motion of the buoyant body 7, the float lever 8 and the second lever 9 as a rigid link makes the moment created due to the weight 10 oppose the moment created due to the weight of the buoyant body 7. This reduces the force required to open trap orifice 11. The dead weight 10 produces opposing moment to the buoyant force during downward motion of the buoyant body 7.
However, when the upstream pressure drops below the downstream pressure, only devices operating in both trapping as well as pumping can recover the condensate successfully. In these devices, the pump mechanism operates between two defined water levels within the enclosure 12 created by base 3, and cover assembly 4. In such a case, the condensate keeps entering the enclosure 12, which causes the float to rise further. This results in the further motion of float lever 8 independent from the second lever 9 after reaching the stopper D, as shown in Figure 4, as the float lever 8 disengages from the second lever 9. When the float lever 8 reaches upper level, pump mechanism operates and opens motive fluid inlet 5. Motive fluid enters the enclosure 12 and when the pressure inside the enclosure 12 becomes higher than the pressure at the condensate outlet 2, condensate starts discharging. As condensate the condensate moves out of enclosure 12, float lever 8 level also falls. As float lever reaches a lower level, motive fluid inlet 5, closes cutting off the motive fluid supply and motive fluid outlet 6 open allowing motive fluid to vent from enclosure 12. This completes the pumping. As float lever 8 moves further downward, it reengages with second lever 9. In any other type of construction, it is also possible that second lever 9 engages 5 degrees even before the float lever 8 reaches lower level.
Figure 6-10 illustrates an alternate embodiment of the float-operated condensate removal device 100 in accordance with the present disclosure.
The condensate removal device 100 of Figure 6-10 comprises an enclosure 12, a condensate inlet 1 and a condensate outlet 2, a motive fluid inlet 5 and a motive fluid outlet 6, a trap orifice 11, a buoyant body 7, a lever 8 and spring 14.
The condensate inlet 1 and a condensate outlet 2 provided on the enclosure 12 and configured to allow condensate to pass through the enclosure 12. The motive fluid inlet 5 and motive fluid outlet 6 provided within the enclosure 12. The motive fluid inlet 5 and motive fluid outlet 6 are configured to allow motive fluid, generally steam, to pass through the enclosure 12. Figures 6-8 illustrate a float-operated mechanism of the present disclosure enclosed within a base 3 and cover assembly 4. The inlet and outlet connections for condensate can be provided on the base 3 and/or the cover assembly 4. The cover assembly 4 and the base 3 are connected together to form an enclosure 12. The motive fluid inlet 5 and the motive fluid outlet 6 are provided on the base 3.
The trap orifice 11 is disposed within the enclosure 12 upstream of the condensate outlet 2. The lever 8 is pivotally mounted in the enclosure 12 at a main pivot point A. The buoyant body 7 is attached to the lever 8. The buoyant body 7 is configured to be displaced due to change in level of condensate accumulated in the enclosure 12.
The spring 14 with one end thereof grounded on a fixed link 18 made on trap seat 13 or any other suitable way and other end of the spring 14 is configured to engage with a lever of the levers 8 via pin 17 at a predetermined lower level of condensate and generate moment on a lever of the levers 8 that is opposite to the moment due to weight of the buoyant body 7, thereby reducing the force exerted for opening the trap orifice 11 to remove the condensate from the enclosure 12.
The buoyant body 7 which can be of any shape is connected pivotally or rigidly to the main pivot A via float lever 8 rigidly connected to the buoyant body 7. The spring-based arrangement is made such that it initially opposes the weight of buoyant body 7. The spring-based arrangement consists of the spring 14 of any form, viz., extension, compression and/or leaf spring or any other form of resilient element. Figure 9 shows an example of one such possible spring arrangement wherein the compression spring 14 is used, one end of spring 14 is ground on the fixed link formed by a trap housing 13. The other end of spring 14 rests on a spring support 15. A pin 17 with an inbuilt stopper D and an externally attached external stopper F are provided, wherein an end of the pin 17 engages with lever 8. The external stopper F is always in contact with spring support 15. Inbuilt stopper D initially is away from fixed link 18 when float lever is at lower level thereby compressing the spring. As the float lever 8 moves upwards, inbuilt stopper D moves near fixed support 18, thereby reducing spring compression. At a certain level, inbuilt stopper D engages with fixed support 18 disengaging pin 17 from float lever 8.
In an operative configuration, initially the spring 14 is in compressed position. The buoyant body 7 in its lower most position is acted by moment of the spring 14 force which restricts the moment due to the weight of the buoyant body 7. When the buoyant body 7 is at its lowermost position, the force generated by the spring 14 is maximum to ensure maximum resistance to the moment of weight of the buoyant body 7. This resistance to the weight of the buoyant body reduces the force required to open trap orifice 11. The spring 14 can be used individually or in series or parallel as per the application.
To restrict the condensate flow in reverse, check valves that can be inbuilt and/or provided externally are provided at the condensate inlet 1 and the condensate outlet 2 which can be inbuilt and/or provided externally. When the available upstream pressure is greater than the downstream pressure, as the condensate enters the enclosure 12, the buoyant body 7 along with float lever 8 begins to move upwards. This motion results in opening of a trap orifice 11 which connects the condensate to the condensate outlet 2. As the float lever 8 moves in an upward direction, the spring 14 begins decompressing leading to a reduced spring force acting on the float lever 8. This brings stopper D closer to the fixed link 18. As the buoyant body 7 rises further stopper D touches fixed 18 and pin 17 disengages from lever 8 as shown in figure 8. Thus, the force generated by spring 14 acting on the float lever 8 now becomes null. The spring force produces opposing moment to the buoyant force during downward motion of the buoyant body 7.
However, when the upstream pressure of the condensate drops below the downstream pressure, only devices operating in both trapping as well as pumping can recover the condensate successfully. The device 100, the pump mechanism operates between two defined water levels within the enclosure 12 created by base 3 and cover assembly 4. In such a case, the condensate keeps entering the enclosure 12, which causes the buoyant body 7 to rise further. Float lever 8 also moves with buoyant body, thereby reducing compression of spring 14, due to movement of stopper D closer to fixed support 18. At a certain level of liquid, pin 17 disengages from float lever 8 bring spring force to zero. When the float lever 8 reaches upper level, pump mechanism operates and opens motive fluid inlet 5. Motive fluid enters the enclosure 12 and when the pressure inside the enclosure 12 becomes higher than the pressure at the condensate outlet 2, condensate starts discharging. As condensate moves out of enclosure 12, float lever 8 level also falls. As float lever reaches a lower level, motive fluid inlet 8, closes cutting off the motive fluid supply and motive fluid outlet 6open allowing motive fluid to vent from enclosure 12. This completes the pumping. As float lever 8moves further downward it reengages with the pin17. In any other type of construction, it is also possible that the pin 17 engages 5 degrees even before the float lever 8 reaches lower level.
Thus, in the device 100 higher operating pressures can be achieved using the same internal components. The device 100 helps in reducing the size of the buoyant body 7 and hence resulting in a compact construction. The device 100 has higher condensate removal capacity. The device 100 has reduced consumption of motive gas per cycle than the prior art. Also, the device 100 has reduced wear and tear of trap orifice 11.
The foregoing description of the embodiments has been provided for purposes of illustration and not intended to limit the scope of the present disclosure. Individual components of a particular embodiment are generally not limited to that particular embodiment but are interchangeable. Such variations are not to be regarded as a departure from the present disclosure, and all such modifications are considered to be within the scope of the present disclosure.
TECHNICAL ADVANCEMENTS
The present disclosure described hereinabove has several technical advantages including, but not limited to, the realization of a float-operated condensate removal device, that:
• has higher operating pressures can be achieved using the same internal components;
• helps in reducing in size of the buoyant body and hence resulting in a compact construction;
• has higher condensate removal capacity;
• has reduced consumption of motive gas per cycle than the prior art; and
• has reduced wear and tear of trap seating orifice.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
The foregoing description of the specific embodiments so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
While considerable emphasis has been placed herein on the components and component parts of the preferred embodiments, it will be appreciated that many embodiments can be made and that many changes can be made in the preferred embodiments without departing from the principles of the disclosure. These and other changes in the preferred embodiment as well as other embodiments of the disclosure will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the disclosure and not as a limitation.

,CLAIMS:WE CLAIM:
1. A float-operated condensate removal device (100) comprising:
a. an enclosure (12);
b. a condensate inlet (1) and a condensate outlet (2) provided on the enclosure (12) and configured to allow condensate to pass through the enclosure (12);
c. motive fluid inlet (5) and motive fluid outlet (6) provided within said enclosure (12), said motive fluid inlet (5) and motive fluid outlet (6) configured to allow motive fluid to pass through said enclosure (12);
d. a trap orifice (11) configured within said enclosure (12) upstream of said condensate outlet (2);
e. a buoyant body (7); and
f. a plurality of levers (8, 9,) pivotally mounted in said enclosure (12) at a main pivot point (A), said buoyant body (7) attached to a lever of said levers (8, 9), said buoyant body (7) configured to be displaced due to change in level of condensate accumulated in said enclosure (12), and the weight of said levers (8, 9) configured to generate moment that is opposite to the moment due to weight of said buoyant body (7), thereby reducing the force exerted for opening said trap orifice (11) to remove the condensate from said enclosure (12).
2. The condensate removal device (100) as claimed in claim 1, wherein said plurality of levers includes:
a. an orifice valve rod (16) configured to be displaced for closing and opening said trap orifice (11);
b. a float lever (8) operatively coupled with said orifice valve rod (16), said float lever (8) pivotally mounted in said enclosure (12) at said main pivot point (A) and configured to pivot for displacing said orifice valve rod (16);
c. a second lever (9) pivotally mounted in said enclosure (12) at said main pivot point (A) and configured to engage with said float lever (8) at a predetermined level of condensate; and
d. a dead weight (10) rigidly attached to said second lever (9), wherein weight of said second lever (9) configured to generate moment on said float lever (8) that is opposite to the moment due to weight of said buoyant body (7).
3. The device (100) as claimed in claim 2, which includes a stopper (D) configured to restrict the movement of said second lever (9) beyond a predetermined level in enclosure (12).
4. The device (100) as claimed in claim 1, wherein said enclosure (12) is formed of a base (3) and a cover assembly (4).
5. The device (100) as claimed in claim 1, which includes check valves provided at condensate inlet (1) and condensate outlet (2) configured to restrict condensate flow in reverse direction in said enclosure (12).
6. The device (100) as claimed in claim 2, wherein said buoyant body (7) is pivotally coupled with said float lever (8) via a main pivot (A).
7. The device (100) as claimed in claim 2, wherein said float lever (8) configured to close said motive fluid inlet (5) and further configured to open said motive fluid outlet (6), thereby cutting off the motive fluid supply and allowing motive fluid to vent from said enclosure (12).
8. A float-operated condensate removal device (100) comprising:
a. an enclosure (12);
b. a condensate inlet (1) and a condensate outlet (2) provided on said enclosure (12) and configured to allow condensate to pass through said enclosure (12);
c. motive fluid inlet (5) and motive fluid outlet (6) provided within said enclosure (12), said motive fluid inlet (5) and motive fluid outlet (6) configured to allow motive fluid to pass through said enclosure (12);
d. a trap orifice (11) disposed within said enclosure (12) upstream of said condensate outlet (2);
e. a buoyant body (7);
f. at least one lever (8) pivotally mounted in said enclosure (12) at a main pivot point (A), said buoyant body (7) attached to said lever (8), said buoyant body (7) configured to be displaced due to change in level of condensate accumulated in said enclosure (12); and
g. a spring (14) with one end thereof grounded on a fixed link (18) and other end of said spring (14) configured to engage with said lever (8) at a predetermined lower level of condensate and generate moment on said lever (8) that is opposite to the moment due to weight of said buoyant body (7), thereby reducing the force exerted for opening said trap orifice (11) to remove the condensate from said enclosure (12).
9. The device (100) as claimed in claim 8, wherein one end of said spring (14) is grounded on said fixed link formed by a trap housing (13) and the other end configured to rest on a spring support (15).
10. The device (100) as claimed in claim 8, which includes a pin (17) passing through said spring (14) and having an inbuilt stopper (D) and an external stopper (F) externally attached to pin (17), wherein said external stopper (F) is configured to remain in contact with said spring support (15) always, and wherein said inbuilt stopper (D) is configured to touch a fixed support (18) to allow said pin (17) to disengage from said float lever (8).
11. The device (100) as claimed in claim 8, wherein said buoyant body (7) at its lower most position allows said spring (14) to generate force that is maximum to ensure maximum resistance to the moment of weight of the buoyant body (7).
12. The device (100) as claimed in claim 8, wherein a plurality of springs is configured to be connected in series or parallel configuration to restrict the movement of said buoyant body (7).
13. The condensate removal device (100) as claimed in claim 8, wherein said plurality of levers (8) includes:
a. an orifice valve rod (16) configured to be displaced for closing and opening said trap orifice (11); and
b. a float lever (8) operatively coupled with said orifice valve rod (16) and configured to pivot for displacing said orifice valve rod (16).
Dated this 09th day of June, 2021

_______________________________
MOHAN RAJKUMAR DEWAN, IN/PA – 25
of R. K. DEWAN & CO.
Authorized Agent of Applicant