Extension Stem Gate Valve
- Body: GGG50
- Bonnet: GGG50
- Wedge: GGG50 EPDM Vulcanized
- Bonnet Bolts: Steel 8.8 + Wax
- Stem: 2Cr13, SS316, SS316L
- Stem Nut: GGG50
- Gasket: NBR
- O Ring: EPDM
- Support: Steel
- Gear Box: Q235
- Resilient Seating: The valve is equipped with a resilient seated design that offers superior sealing and leak prevention.
- Corrosion Resistance: The valve components are built to resist corrosion, ensuring a longer lifespan even in harsh underground conditions.
- EPDM Sealing: The extension stem and other components use EPDM vulcanized material, ensuring durability and compatibility with drinking water applications.
- Adjustable Stem Length: The extension spindle, coupled with the telescopic drive rod, allows for flexible installation and operation at various depths.
| No. | Part | Material | ASTM Spec. |
|---|---|---|---|
| 1 | Body | Ductile Iron | A536-65-45-12 |
| 2 | Wedge | Ductile Iron | EPDM Encapsulated A536-65-45-12 |
| 3 | Stem Nut | Bronze | ASTM C95200 |
| 4 | Stem | Stainless Steel | ANSI 304 |
| 5 | Gasket | Rubber | EPDM |
| 6 | Bolt | Stainless Steel | SS304 |
| 7 | Bonnet | Ductile Iron | A536-65-45-12 |
| 8 | O-Ring | Rubber | NBR |
| 9 | Thrust Collar | Bronze | ASTM C95200 |
| 10 | O-Ring | Rubber | NBR |
| 11 | Gland | Ductile Iron | A536-65-45-12 |
| 12 | O-Rings | Rubber | NBR |
| 13 | Dust Ring | Rubber | NBR |
| 14 | Operating Nut (Optional) | Ductile Iron | A536-65-45-12 |
| 15 | Bolts | Stainless Steel | SS304 |
| 16 | Washer | Stainless Steel | SS304 |
| 17 | Handwheel (Optional) | Ductile Iron | A536-65-45-12 |
| 18 | Bolts | Stainless Steel | SS304 |
Extension Stem Gate Valve
The extension stem gate valve is a robust and reliable valve solution designed for underground installations. Typically used in water supply systems, this valve is designed to be installed below the ground surface, with its operating components accessible from the surface level for ease of maintenance and operation. Below, we will explore the installation process, design features, and operation of the extension stem gate valve.
Installation of Extension Stem Gate Valve
The underground resilient seated gate valve with the extension spindle, telescopic drive rod, and surface box is installed below the ground surface, with the valve body embedded in the pipeline. This setup is ideal for locations where access to the valve is required from the surface level, while the valve body itself remains safely underground, integrated within the pipeline.
Extension Spindle and Telescopic Drive Rod
The extension spindle extends from the valve body up to the surface level, allowing for easy operation of the valve even when the valve body is buried deep underground. This spindle passes through the telescopic drive rod, which is a key component that allows for the adjustment of the height of the extension spindle to match the installation depth of the valve.
The telescopic drive rod ensures that the extension spindle can be adjusted as needed, offering flexibility for different installation depths and ensuring that the valve can be operated from the surface, regardless of how deep it is buried.
Surface Box
The surface box is positioned at ground level and serves as a protective enclosure for the extension spindle and telescopic drive rod. It provides an easily accessible point for valve operation, allowing the user to operate and maintain the valve with minimal effort. The surface box prevents dirt, debris, and other external elements from interfering with the valve’s operation while providing a weather-resistant enclosure.
Operating the Valve
To operate the underground gate valve, a wrench or valve key can be used to turn the extension spindle inside the surface box. Turning the spindle will raise or lower the gate inside the valve body, thereby controlling the flow of the fluid through the pipeline. This simple operation makes the valve easy to manage, even in remote or underground locations.
Design Standards and Compliance
The extension stem gate valve is designed according to several internationally recognized standards to ensure reliability, safety, and compatibility with existing systems.
- Valve Design: Conforms to DIN3352 and EN1074 standards.
- Face to Face Dimensions: Compliant with DIN3302 F4/F5 and EN558-1 standards, ensuring standardized dimensions for ease of integration into existing pipeline systems.
- Flange Drilling: Standard flange drilling according to EN1092-2 and ISO7005-2, ensuring compatibility with various flange types.
- Hydraulic Testing: The valve undergoes hydraulic testing according to EN12266 and ISO5208, ensuring that each valve meets strict leakage and pressure requirements.
Applications of the Extension Stem Gate Valve
This valve is suitable for a variety of underground installations, including:
- Water Supply Systems: Ideal for controlling the flow of potable water in municipal and industrial pipelines.
- Irrigation Systems: Used to manage water flow in agricultural applications.
- Sewage and Wastewater Systems: Used in wastewater treatment plants for controlling fluid flow.
With its durable construction and user-friendly operation, the extension stem gate valve is an essential component for underground fluid control.
Conclusion
The extension stem gate valve offers a reliable and efficient solution for underground fluid control. With features such as resilient seating, corrosion resistance, and easy surface-level operation, this valve provides a seamless and durable option for managing pipelines that require underground installation.
Explore More with Jhy Group
Jhy Group is dedicated to providing high-quality valve solutions, including the extension stem gate valve, designed to meet the most stringent industry standards. Our products are built to last and are ideal for a wide range of applications.
For more information:
- Download our product catalog to explore detailed specifications.
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