A non-draining push-through gate valve and a method thereof

Abstract

A non-draining push-through gate valve (100) is disclosed. A two-piece bolted body (105) with two circular reinforced elastomer seats positioned at opposite sides. The two circular reinforced elastomer seats provide a tight seal in the open position. A gate (115) that moves along a vertical axis, pushing apart the elastomer seats when in the closed position, with an upward closing stroke. Two driving rods (120a, 120b) are positioned within the bolted body via guide slots, connecting to the gate's leading edge through a connector. The two driving rods transfer an actuating force, minimizing buckling forces and exiting the body during closure to create a compensatory volume equal to the fluid displaced by the gate, preventing pressurization. A hand wheel actuator (130) for operation, a gate cover (135) for protection, a packing gland assembly (140) to prevent leakage, and a gate support (145) to stabilize movement.

Description

[0001] A NON-DRAINING PUSH-THROUGH GATE VALVE AND A METHOD THEREOF

[0002] EARLIEST PRIORITY DATE:

[0003] This Application claims priority from a Complete patent application filed in India having Patent Application No. 202441079003, filed on October 17, 2024, and titled “A NON-DRAINING PUSH-THROUGH GATE VALVE AND A METHOD THEREOF”

[0004] FIELD OF INVENTION

[0005] Embodiments of the present disclosure relate to the field of fluid control systems, and more particularly, a non-draining push-through gate valve and a method thereof.

[0006] BACKGROUND

[0007] Push-through gate (PTG) valves are a type of industrial valve commonly used for handling contaminated media, such as slurries and sludges. The PTG valves offer several advantages over other valve types and are widely popular. However, they also have certain drawbacks. One major issue is that the valve’s body cavity needs to be drained periodically or continuously for proper functioning.

[0008] In PTG valve operation, a gate moves between two identical elastomer seats, forcing the seats apart during the closing stroke using the pointed edge of the gate. As the gate closes, it first reaches the inner diameter of the elastomer seat, which isolates the body cavity from the flow bore. However, the gate must move further, typically to the outer diameter of the seat for complete closure. During this movement, if the medium being handled is a liquid (which is incompressible), the fluid inside the body cavity becomes pressurized. This pressure buildup must be relieved to allow the gate to close properly. Typically, this is managed by fluid leaking past the packing at the top, back into the flow bore, or through an open bottom cover or drain connection.

[0009] Most PTG valves are equipped with wiper packing, which is not fully leak-tight, as they are not designed to provide a complete fluid seal. Consequently, these valves are fitted with a bottom cover that includes a drain port. Many users remove the drain cover and allow the fluid to drain to the ground, while others connect the drain port to a sump. Toward the end of the valve’s closing stroke, the gate moves into a locked volume of fluid. If the medium is a liquid, this can cause excessive pressure, leading to leakage through the seats or seals. To prevent this, body drains are typically provided. Additionally, many PTG valves use gland guides that are not leak-tight, unlike traditional gland packings used in other valve types, further allowing for some leakage to relieve pressure.

[0010] Hence, there is a need for a non-draining push-through gate valve and a method thereof which addresses the aforementioned issue(s).

[0011] OBJECTIVES OF THE INVENTION

[0012] Primary objective of the invention is to provide a push-through gate valve with a nondraining body that does not require drainage, enhancing operational efficiency.

[0013] Another objective of the invention is to include two circular reinforced elastomer seats, inserted from either side and held in place by mating pipeline flanges, ensuring a secure and tight seal.

[0014] Yet another objective of the invention is to utilize two driving rods positioned within the two-piece bolted body via two or more guide slots to enable smooth and steady movement of the gate, improving the reliability of valve operation. Yet another objective of the invention is to provide an upward closing stroke mechanism, operated by a hand wheel that drives the two driving rods connected to the gate, ensuring precise control and efficient operation.

[0015] BRIEF DESCRIPTION

[0016] In accordance with an embodiment of the present disclosure, a non-draining push- through gate valve is provided. The non-draining push-through gate valve includes a two-piece bolted body including two circular reinforced elastomers seats. The two circular reinforced elastomers seats are placed at opposite sides of the two-piece bolted body and coupled via a plurality of mating flanges of a pipeline. The two circular reinforced elastomers seats are adapted to provide a tight seal in an open position. The non-draining push-through gate valve includes a gate adapted to move along a vertical axis. The gate pushes apart the two circular reinforced elastomer seats when in a closed position. The gate moves in an upward closing stroke. The non-draining push-through gate valve includes two driving rods positioned within the two-piece bolted body via two or more guide slots and connected near the leading edge of the gate through a connector. The two driving rods is adapted to transfer an actuating force to the beveled, penetrating tip of the gate, thereby minimizing buckling forces on the gate. The two driving rods are adapted to permit movement of the gate between the open position and the closed position. The two driving rods is adapted to exit the two-piece bolted body during gate closure, thereby creating a compensatory volume equal to the fluid displaced by the gate to prevent fluid pressurization within a body cavity. The nondraining push-through gate valve includes a hand wheel actuator operatively connected to the two driving rods. The hand wheel actuator is adapted to move the gate in an upward closing stroke by actuating the two driving rods thereby pushing the two circular reinforced elastomers seats apart as the gate moves upward to the closed position. The non-draining push-through gate valve includes a gate cover positioned at the bottom of the non-draining push-through gate valve. The gate cover is adapted bolt to the two-piece bolted body for protection. The non-draining push-through gate valve includes a packing gland assembly adapted to seal the two driving rods and the gate, to prevent fluid leakage. The non-draining push-through gate valve includes a gate support provided at the top side of the two-piece bolted body. The gate support is adapted to stabilize the gate during gate movement.

[0017] In accordance with another embodiment of the present disclosure, a method to operate a non-draining push-through gate valve is provided. The method includes providing, by two circular reinforced elastomers seats of a two-piece bolted body, a tight seal in an open position. The method includes moving, by a gate, along a vertical axis. The gate pushes apart the two circular reinforced elastomer seats when in a closed position. The gate moves in an upward closing stroke. The method includes transferring, by two driving rods, an actuating force to the beveled, penetrating tip of the gate, thereby minimizing buckling forces on the gate. The method includes permitting, by the two driving rods, movement of the gate between the open position and the closed position. The method includes exiting, by the two driving rods, the two-piece bolted body during gate closure, thereby creating a compensatory volume equal to the fluid displaced by the gate to prevent fluid pressurization within a body cavity. The method includes moving, by a hand wheel actuator, the gate in an upward closing stroke by actuating the two driving rods thereby pushing the two circular reinforced elastomers seats apart as the gate moves upward to the closed position. The method includes bolting, by a gate cover, the two-piece bolted body for protection. The method includes sealing, by a packing gland, the two driving rods and the gate, to prevent fluid leakage. The method includes stabilizing, by a gate support, the gate during the gate movement.

[0018] To further clarify the advantages and features of the present disclosure, a more particular description of the disclosure will follow by reference to specific embodiments thereof, which are illustrated in the appended figures. It is to be appreciated that these figures depict only typical embodiments of the disclosure and are therefore not to be considered limiting in scope. The disclosure will be described and explained with additional specificity and detail with the appended figures.

[0019] BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The disclosure will be described and explained with additional specificity and detail with the accompanying figures in which:

[0021] FIG. 1(a) and FIG. 1(b) is a schematic representation of a non-draining push-through gate valve in accordance with an embodiment of the present disclosure;

[0022] FIG. 2(a) and FIG. 2(b) provide a schematic representation of the non-draining push- through gate valve in a fully open position and fully closed position respectively of FIG. 1(a) and FIG. l(b)in accordance with an embodiment of the present disclosure; and

[0023] FIG. 3(a) and FIG. 3(b) illustrate a flow chart representing the steps involved in a method to operate a non-draining push-through gate valve in accordance with an embodiment of the present disclosure.

[0024] Further, those skilled in the art will appreciate that elements in the figures are illustrated for simplicity and may not have necessarily been drawn to scale. Furthermore, in terms of the construction of the device, one or more components of the device may have been represented in the figures by conventional symbols, and the figures may show only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the figures with details that will be readily apparent to those skilled in the art having the benefit of the description herein.

[0025] DETAILED DESCRIPTION

[0026] For the purpose of promoting an understanding of the principles of the disclosure, reference will now be made to the embodiment illustrated in the figures and specific language will be used to describe them. It will nevertheless be understood that no limitation of the scope of the disclosure is thereby intended. Such alterations and further modifications in the illustrated system, and such further applications of the principles of the disclosure as would normally occur to those skilled in the art are to be construed as being within the scope of the present disclosure.

[0027] The terms “comprises”, “comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such a process or method. Similarly, one or more devices or subsystems or elements or structures or components preceded by "comprises... a" does not, without more constraints, preclude the existence of other devices, sub-systems, elements, structures, components, additional devices, additional sub-systems, additional elements, additional structures or additional components. Appearances of the phrase "in an embodiment", "in another embodiment" and similar language throughout this specification may, but not necessarily do, all refer to the same embodiment.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. The system, methods, and examples provided herein are only illustrative and not intended to be limiting.

[0029] In the following specification and the claims, reference will be made to a number of terms, which shall be defined to have the following meanings. The singular forms “a”, “an”, and “the” include plural references unless the context clearly dictates otherwise.

[0030] Embodiments of the present disclosure, related to a non-draining push-through gate valve. The non-draining push-through gate valve includes a two-piece bolted body including two circular reinforced elastomers seats. The two circular reinforced elastomers seats are placed at opposite sides of the two-piece bolted body and coupled via a plurality of mating flanges of a pipeline. The two circular reinforced elastomers seats are adapted to provide a tight seal in an open position. The non-draining push- through gate valve includes a gate adapted to move along a vertical axis. The gate pushes apart the two circular reinforced elastomer seats when in a closed position. The gate moves in an upward closing stroke. The non-draining push-through gate valve includes two driving rods positioned within the two-piece bolted body via two or more guide slots and connected near the leading edge of the gate through a connector. The two driving rods is adapted to transfer an actuating force to the beveled, penetrating tip of the gate, thereby minimizing buckling forces on the gate. The two driving rods is adapted to permit movement of the gate between the open position and the closed position. The two driving rods is adapted to exit the two-piece bolted body during gate closure, thereby creating a compensatory volume equal to the fluid displaced by the gate to prevent fluid pressurization within a body cavity. The non-draining push- through gate valve includes a hand wheel actuator operatively connected to the two driving rods. The hand wheel actuator is adapted to move the gate in an upward closing stroke by actuating the two driving rods thereby pushing the two circular reinforced elastomers seats apart as the gate moves upward to the closed position. The nondraining push-through gate valve includes a gate cover positioned at the bottom of the non-draining push-through gate valve. The gate cover is adapted bolt to the two-piece bolted body for protection. The non-draining push-through gate valve includes a packing gland assembly adapted to seal the two driving rods and the gate, to prevent fluid leakage. The non-draining push-through gate valve includes a gate support provided at the top side of the two-piece bolted body. The gate support is adapted to stabilize the gate during the gate movement.

[0031] FIG. 1(a) and FIG. 1(b) is a schematic representation of a non-draining push-through gate valve (100) in accordance with an embodiment of the present disclosure. The nondraining push-through gate valve (100) is a type of valve used to control the flow of fluid through a pipe. The fluid includes, but is not limited to, slurry, water, oil, chemical solutions, and the like. The non-draining push-through gate valve (100) includes a two- piece bolted body (105) including two circular reinforced elastomers seats (110). The two-piece bolted body (105) forms the main housing of the non-draining push-through gate valve (100). The two-piece bolted body (105) is made of material including, but is not limited to, cast steel, stainless steel, high-grade alloys, and the like. The two circular reinforced elastomers seats (110) are placed at opposite sides of the two-piece bolted body (105) and coupled via a plurality of mating flanges of a pipeline. The two circular reinforced elastomers seats (110) are adapted to provide a tight seal in an open position. The tight sealing prevents any leakage through the non-draining push-through gate valve (100). When a gate (115) moves into the closed position, the two circular reinforced elastomers seats (110) are pushed apart, allowing for complete closure and sealing of the flow path.

[0032] In an embodiment, corrosion-resistant materials may be used in the non-draining push- through gate valve (100) for all its components.

[0033] It must be noted that the two circular reinforced elastomers seats (110) converge at the center of a body of the non-draining push-through gate valve (100) with sufficient compressive force to create a tight fluid seal when the non-draining push-through gate valve (100) is open.

[0034] The non-draining push-through gate valve (100) operates by moving the gate (115) between the two circular reinforced elastomers seats (110) to either block or allow the flow. The gate (115) controls the flow of the fluid. The gate (115), a flat, vertically oriented plate, moves along a vertical axis between the open and closed positions. In the open position, the gate (115) allows fluid to flow through the valve unobstructed. When moved to the closed position, the gate (115) pushes apart the two circular reinforced elastomer seats, thereby blocking the fluid flow. The gate (115) operates in an upward closing stroke to achieve this. The actuating force is applied at the leading edge of the gate (115), enabling the use of composite materials comprising fiber reinforced plastic or sandwich structures with a metal edge for the gate (115).

[0035] In an embodiment, the gate (115) is designed as a thinner movable component that minimizes buckling forces on the gate (115). This reduction in buckling forces allows for the use of a thinner gate, improving the overall efficiency and reducing stress on the elastomer seats during valve operation.

[0036] The non-draining push-through gate valve (100) includes two driving rods (120a, 120b) positioned within the two-piece bolted body via two or more guide slots (125 a, 125b) and connected near the leading edge of the gate (115) through a connector. The two driving rods (120a, 120b) is adapted to transfer an actuating force to the beveled, penetrating tip of the gate (115), thereby minimizing buckling forces on the gate (115). The actuating force is coming from a hand wheel actuator (130) (or other actuating mechanisms) to the gate (115), allowing the gate (115) to move between the open and closed positions. By connecting to the leading edge of the gate (115), the two driving rods (120a, 120b) ensure the force is applied where it’s most effective, reducing the risk of buckling. As the gate (115) closes, the two driving rods (120a, 120b) exit the two-piece bolted body (105), thereby creating a compensatory volume equal to the fluid displaced by the gate (115) to prevent fluid pressurization within a body cavity. The connector links the driving rods to the leading edge of the gate (115). The connector allows the two driving rods (120a, 120b) to transfer force efficiently to the gate (115), ensuring smooth movement.

[0037] In the closed position, the tip of the gate (115) aligns with the inner diameter (ID) of the seats, isolating the flow bore from the valve body cavity. At this point, the fluid trapped inside the body cavity is fully contained. The gate (115) needs to move slightly further (towards the outer diameter (OD) of the seat) to reach the fully closed position. To enable this movement, the push through gate valves creates a compensatory volume within the body cavity, preventing fluid pressurization. The volume required by the gate (115) to move from close position to open position is given by:

[0038] ^Required=L X W X T

[0039] Where:

[0040] L = the distance between close position to open position the gate movement,

[0041] W = the width of the gate,

[0042] T = the thickness of the gate.

[0043] The gate (115) is moved by the two driving rods (120a, 120b) connected to it. As the gate (115) closes, the two driving rods (120a, 120b) move the same distance as the gate (115) and exit the body cavity, creating additional volume. The volume generated by the two driving rods (120a, 120b) moving out of the body cavity during gate (115) closure is:

[0044] Where, D is the diameter of the two driving rods (120a, 120b). By ensuring that areequal, the fluid within the body cavity remains unpressurized, facilitating smooth valve operation. The diameter of the two driving rods (120a, 120b) D, is selected accordingly to meet this requirement.

[0045] The hand wheel actuator (130) is a mechanical device connected to the two driving rods (120a, 120b), typically positioned on the top position of the two-piece bolted body (105). The hand wheel actuator (130) is manually operated to control the movement of the gate (115). By turning the hand wheel actuator (130), the two driving rods (120a, 120b) are actuated, causing the gate (115) to move vertically. The upward stroke of the gate (115) (closing) ensures smooth operation. The non-draining push-through gate valve (100) includes a gate cover (135) positioned at the bottom of the non-draining push-through gate valve (100). The gate cover (135) is adapted bolt to the two-piece bolted body (105) for protection. The gate cover (135) protects the internal components from external elements and damage.

[0046] The non-draining push-through gate valve (100) includes a packing gland assembly (140) adapted to seal the two driving rods (120a, 120b) and the gate, to prevent fluid leakage.

[0047] The non-draining push-through gate valve (100) includes a gate support (145) provided at the top side of the two-piece bolted body (105). The gate support (145) is adapted to stabilize the gate (115) during the gate movement. More specifically, the gate support (145) ensures the gate remains aligned as it moves vertically, preventing it from wobbling or becoming misaligned.

[0048] FIG. 2(a) and FIG. 2(b) provide a schematic representation of the non-draining push- through gate valve (100) in a fully open position FIG. 2(a) and fully closed position FIG. 2(b) in accordance with an embodiment of the present disclosure. In the fully open position, as depicted in FIG. 2(a), the gate (115) is in the lowest position, allowing fluid to flow unobstructed through the non-draining push-through gate valve (100). In this position, the two circular reinforced elastomer seats remain in close contact, forming a tight seal with the pipeline but without obstructing the flow path. The gate (115) is entirely removed from the flow path. In FIG. 2(b), the fully closed position is shown, where the gate (115) has been pushed upwards, pressing against the two circular reinforced elastomer seats. This movement of the gate (115) causes the elastomer seats to be pushed apart, fully blocking the flow of fluid through the valve.

[0049] FIG. 3(a) and FIG. 3(b) illustrate a flow chart representing the steps involved in a method (200) to operate a non-draining push-through gate valve in accordance with an embodiment of the present disclosure. The non-draining push-through gate valve is a type of valve used to control the flow of fluid through a pipe. The fluid includes, but is not limited to, slurry, water, oil, chemical solutions, and the like. The method (200) includes providing, by two circular reinforced elastomers seats of a two-piece bolted body, a tight seal in an open position in step 205. The tight sealing prevents any leakage through the non-draining push-through gate valve. When a gate moves into the closed position, the two circular reinforced elastomers seats are pushed apart, allowing for complete closure and sealing of the flow path.

[0050] In an embodiment, corrosion-resistant materials may be used in the non-draining push- through gate valve for all its components.

[0051] It must be noted that the two circular reinforced elastomers seats converge at the center of a body of the non-draining push-through gate valve with sufficient compressive force to create a tight fluid seal when the non-draining push-through gate valve is open.

[0052] The two-piece bolted body forms the main housing of the non-draining push-through gate valve. The two-piece bolted body is made of material including but not limited to cast steel, stainless steel, high-grade alloys, and the like.

[0053] The method (200) includes moving, by a gate, along a vertical axis. The gate pushes apart the two circular reinforced elastomer seats when in a closed position. The gate moves in an upward closing stroke in step 210. The gate controls the flow of the fluid. The gate, a flat, vertically oriented plate, moves along a vertical axis between the open and closed positions. In the open position, the gate allows fluid to flow through the valve unobstructed.

[0054] In an embodiment, the gate is designed as a thinner movable component that minimizes buckling forces on the gate. This reduction in buckling forces allows for the use of a thinner gate, improving the overall efficiency and reducing stress on the elastomer seats during valve operation. The method (200) includes transferring, by two driving rods, an actuating force to the beveled, penetrating tip of the gate, thereby minimizing buckling forces on the gate in step 215. The actuating force is applied at the leading edge of the gate, enabling the use of composite materials comprising fiber reinforced plastic or sandwich structures with a metal edge for the gate.

[0055] The method (200) includes permitting, by the two driving rods, movement of the gate between the open position and the closed position in step 220.

[0056] The method (200) includes exiting, by the two driving rods, the two-piece bolted body during gate closure, thereby creating a compensatory volume equal to the fluid displaced by the gate to prevent fluid pressurization within a body cavity in step 225.

[0057] The method (200) includes moving, by a hand wheel actuator, the gate in an upward closing stroke by actuating the two driving rods, thereby pushing the two circular reinforced elastomers seats apart as the gate moves upward to the closed position in step 230. The hand wheel actuator is a mechanical device connected to the two driving rods, typically positioned on the top position of the two-piece bolted body. The hand wheel actuator is manually operated to control the movement of the gate.

[0058] The method (200) includes bolting, by a gate cover, the two-piece bolted body for protection in step 235. The gate cover protects the internal components from external elements and damage.

[0059] The method (200) includes sealing, by a packing gland, the two driving rods and the gate, to prevent fluid leakage in step 240.

[0060] The method (200) includes stabilizing, by a gate support, the gate during the gate movement in step 245. More specifically, the gate support ensures the gate remains aligned as it moves vertically, preventing it from wobbling or becoming misaligned. Various embodiments of the non-draining push-through gate valve and the method thereof as described above offer several advantages. By using specifically sized two driving rods connected to the gate, the issue of fluid pressurization within the body cavity is effectively eliminated. This prevents leakage and eliminates the need for a body drain. The gate operates using an upward closing stroke, allowing any media sediments at the bottom of the valve body to remain unaffected by gate movement during closure. The connection of the two driving rods to the leading edge of the gate ensures that the actuating force is optimally applied where it is most needed, reducing buckling forces. This feature allows for the use of a thinner gate, minimizing seat flexure and wear. Furthermore, the absence of a body drain requirement makes the push-through gate valves suitable for handling a wide range of media, including corrosive fluids. The non-draining push-through gate valves also incorporate a high- performance packing gland assembly to seal the two driving rods and gate, ensuring fluid-tight operation. The application of actuating force at the leading edge of the gate opens the possibility for using materials such as fiber-reinforced plastic (FRP) or sandwich composites (composites with metal edges) for the gate.

[0061] It will be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of the disclosure and are not intended to be restrictive thereof.

[0062] While specific language has been used to describe the disclosure, any limitations arising on account of the same are not intended. As would be apparent to a person skilled in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein.

[0063] The figures and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, the order of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts need to be necessarily performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples.

Claims

I CLAIM:

1. A non-draining push-through gate valve (100) comprising: characterized in that, a two-piece bolted body (105) comprising: two circular reinforced elastomers seats (110) placed at opposite sides of the two-piece bolted body (105) and coupled via a plurality of mating flanges of a pipeline, wherein the two circular reinforced elastomers seats (110) are adapted to provide a tight seal in an open position; a gate (115) adapted to move along a vertical axis, wherein the gate (115) pushes apart the two circular reinforced elastomer seats when in a closed position, wherein the gate (115) moves in an upward closing stroke; two driving rods (120a, 120b) positioned within the two-piece bolted body (105) via two or more guide slots (125a, 125b) and connected near the leading edge of the gate (115) through a connector, wherein the two driving rods (120a, 120b) is adapted to: transfer an actuating force to the beveled, penetrating tip of the gate (115), thereby minimizing buckling forces on the gate (115); permit movement of the gate (115) between the open position and the closed position; and exit the two-piece bolted body (105) during gate (115) closure, thereby creating a compensatory volume equal to the fluid displaced by the gate (115) to prevent fluid pressurization within a body cavity; a hand wheel actuator (130) operatively connected to the two driving rods (120a, 120b), wherein the hand wheel actuator (130) is adapted to move the gate (115) in an upward closing stroke by actuating the two driving rods (120a, 120b) thereby pushingthe two circular reinforced elastomers seats (110) apart as the gate (115) moves upward to the closed position; a gate cover (135) positioned at the bottom of the non-draining push-through gate valve, wherein the gate cover (135) is adapted bolt to the two-piece bolted body (105) for protection; a packing gland assembly (140) adapted to seal the two driving rods (120a, 120b) and the gate (115), to prevent fluid leakage; and a gate support (145) provided at the top side of the two-piece bolted body (105), wherein the gate support (145) is adapted to stabilize the gate (115) during the gate movement.

2. The non-draining push-through gate valve (100) as claimed in claim 1 , wherein the two circular reinforced elastomers seats (110) meet at the centre of the valve body, exerting sufficient compressive force to form a tight fluid seal when the gate (115) is in the open position.

3. The non-draining push-through gate valve (100) as claimed in claim 1 , wherein the push-through gate valve (100) is used to handle corrosive fluids.

4. The non-draining push-through gate valve (100) as claimed in claim 1 , wherein the actuating force is applied at the leading edge of the gate (115), enabling the use of composite materials comprising fibre reinforced plastic or sandwich structures with a metal edge for the gate (115).

5. The non-draining push-through gate valve (100) as claimed in claim 1, wherein two or more guide slots (125a, 125b) are provided to ensure smooth and steady movement of the gate (115) during operation.

6. The non-draining push-through gate valve (100) as claimed in claim 1 , wherein the gate (115) is a thin, movable component controlled by the two driving rods (120a, 120b).

7. The non-draining push-through gate valve (100) as claimed in claim 1 , wherein the connector links the two driving rods (120a, 120b) to the leading edge of the gate (115), allowing the two driving rods (120a, 120b) to transfer force to the gate (115), thereby ensuring smooth movement of the gate (115) during operation.

8. The method (200) to operate a non-draining push-through gate valve comprising: characterized in that, providing, by two circular reinforced elastomers seats of a two-piece bolted body, a tight seal in an open position; (205) moving, by a gate, along a vertical axis, wherein the gate pushes apart the two circular reinforced elastomer seats when in a closed position, wherein the gate moves in an upward closing stroke; (210) transferring, by two driving rods, an actuating force to the beveled, penetrating tip of the gate, thereby minimizing buckling forces on the gate; (215) permitting, by the two driving rods, movement of the gate between the open position and the closed position; (220) exiting, by the two driving rods, the two-piece bolted body during gate closure, thereby creating a compensatory volume equal to the fluid displaced by the gate to prevent fluid pressurization within a body cavity; (225) moving, by a hand wheel actuator, the gate in an upward closing stroke by actuating the two driving rods thereby pushing the two circular reinforced elastomers seats apart as the gate moves upward to the closed position; (230)bolting, by a gate cover, the two-piece bolted body for protection; (235) sealing, by a packing gland, the two driving rods and the gate, to prevent fluid leakage; and (240) stabilizing, by a gate support, the gate during the gate movement. (245)

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