An underground gate valve operates by using a gate or a wedge-shaped disc to control the flow of fluid through a piping system.

Here's how it typically works:

Valve Position: The gate valve can be in either an open or closed position. In the closed position, the gate or disc blocks the flow of fluid, while in the open position, the gate is lifted or moved aside, allowing fluid to pass through.

Gate Structure: The gate or disc of an underground gate valve is typically rectangular or wedge-shaped. It is attached to a stem or spindle that extends vertically from the gate and is connected to the valve's operating mechanism.

Fluid Flow Control: To control the flow of fluid, the valve is operated by turning the operating mechanism, which lifts or lowers the gate. When the gate is in the closed position, it fits tightly against the valve seat, creating a seal that prevents fluid from passing through.

Opening the Valve: To open the valve, the operating mechanism is turned in a specific direction, which raises the gate from the valve seat. As the gate is lifted, a pathway is created for the fluid to flow through the valve.

Fully Open Position: When the valve is fully open, the gate is completely lifted, allowing the fluid to flow freely through the valve without obstruction. This provides maximum flow capacity with minimal pressure drop.

Closing the Valve: To close the valve, the operating mechanism is turned in the opposite direction, which lowers the gate back onto the valve seat. As the gate makes contact with the seat, it forms a tight seal, preventing the fluid from passing through the valve.

Flow Control Precision: Underground gate valves provide precise control over the flow of fluid by allowing the gate to be partially lifted, thus regulating the flow rate. This feature allows for throttling or modulating the flow as needed.

Operation Mechanisms: Underground gate valves can be operated manually using a handwheel or lever for smaller valves or through automated systems for larger valves. Automated systems can use electric, hydraulic, or pneumatic actuators to control the valve remotely.

It's important to note that underground gate valves are typically designed for on-off applications rather than continuous throttling. They are commonly used in various industries, including water distribution, underground gate valve wastewater treatment, oil and gas, and industrial processes, where a reliable and efficient flow control solution is required.

How is an underground gate valve installed in an underground piping system?


Installing an underground gate valve in a piping system involves several steps. Here is a general overview of the installation process:

Planning and Preparation:

Determine the appropriate location for the valve in the underground piping system, considering factors such as accessibility, proximity to the desired control point, and the layout of the pipeline.
Ensure that the valve size, type, and specifications align with the requirements of the piping system.
Obtain necessary permits and follow any local regulations or guidelines for underground installations.
Excavation:

Excavate the area where the valve will be installed, ensuring sufficient space for the valve and associated piping.
Excavation should be done carefully to avoid damaging existing underground utilities and structures.
Valve Placement:

Place the gate valve within the excavated area, ensuring proper alignment with the pipeline.
The valve should be oriented correctly, with the flow direction indicated by arrows on the valve body.
Piping Connection:

Connect the valve to the existing piping system using appropriate fittings, such as flanges or threaded connections.
Ensure the proper alignment and tightness of the connections to prevent leaks.
Valve Support:

Provide adequate support for the valve to ensure its stability and prevent stress on the piping connections.
Use suitable support structures, such as concrete pads or brackets, to secure the valve in place.
Backfilling:

Carefully backfill the excavated area around the valve, ensuring proper compaction of the soil.
Gradually backfill and compact the soil in layers to avoid excessive pressure on the valve and maintain stability.
Accessibility and Marking:

After the valve is installed and backfilled, ensure that it is easily accessible for operation, maintenance, and inspection.
Mark the location of the valve using appropriate signage or markers for future reference.
Testing and Commissioning:

Conduct pressure testing to ensure the integrity of the installed valve and associated connections.
Verify that the valve operates smoothly and effectively, opening and closing without any issues.
It's important to note that the specific installation process may vary depending on factors such as the valve size, type, and the requirements of the underground piping system. Following manufacturer guidelines and consulting with qualified professionals is crucial to ensure a proper and reliable installation.

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