Gate Valve -Worm Gear Non-Rising Stem Cast Iron
Production Overview
The Worm Gear Non-Rising Stem Cast Iron Gate Valve from Vcore Valve is designed for smooth, reliable operation in pipeline systems where high torque is required to ensure a tight seal. With a non-rising stem (NRS) design, our valve offers space-saving benefits for installations with limited vertical clearance. The worm gear actuator provides a mechanical advantage for easier operation and precise control, even in high-pressure systems.
Key Features
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Worm Gear Actuation – Provides smooth, easy operation with high torque output for reliable shutoff
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Non-Rising Stem Design – Saves vertical space for confined installations or underground use
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Durable Cast Iron Body – High-strength, corrosion-resistant construction for long service life
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Encapsulated Wedge – Rubber-seated for a leak-tight seal and improved sealing performance
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Full-Bore Flow – Minimizes pressure loss and allows for efficient media passage
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Long Service Life – Low-maintenance design with easy stem and seal replacement
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Manual and Electric Operation – Manual handwheel, optional electric actuator for automation
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Compliant with International Standards – Manufactured to meet ANSI, ISO, and AWWA standards
Technical Specifications
| Item | Description |
|---|---|
| Valve Type | Worm Gear Non-Rising Stem Cast Iron Gate Valve |
| Body Material | Cast Iron (ASTM A126, GGG50) |
| Wedge Material | Ductile Iron or Stainless Steel with Rubber Seat |
| Seat Material | Metal Seat (SS 304/316 or Brass) or Rubber Seat (EPDM/NBR) |
| Stem Material | Stainless Steel 304 / 316 |
| Coating | Fusion Bonded Epoxy (FBE) or Painting |
| Size Range | DN50–DN1200 (2”–48”) |
| Pressure Rating | PN10 / PN16 / PN25 / 150LB |
| Temperature Rating | -10°C to +80°C (rubber seat), up to 250°C (metal seat) |
| Connection Types | Flanged (ANSI B16.1), Grooved (AWWA C606), Threaded |
| Stem Type | Non-Rising Stem (NRS) |
| Operation | Manual Handwheel or Electric Actuator |
| Media | Water, Oil, Gas, Fire Water, Steam |
| Standards Compliance | AWWA C509, ISO 9001, EN 1074-2 |
Main Dimensions & Weight
| DN (mm) | L (mm) | H (mm) | W (mm) | Weight (kg) |
|---|---|---|---|---|
| 50 | 160 | 290 | 150 | 12 |
| 100 | 200 | 380 | 180 | 22 |
| 150 | 250 | 480 | 210 | 38 |
| 200 | 300 | 600 | 250 | 65 |
| 250 | 350 | 720 | 300 | 100 |
| 300 | 400 | 860 | 350 | 150 |
| 400 | 500 | 1000 | 400 | 230 |
| 500 | 600 | 1200 | 500 | 320 |
Function
Our Worm Gear Non-Rising Stem Cast Iron Gate Valve is primarily used to control the flow of water, oil, gas, and steam in pipeline systems. The valve’s non-rising stem design allows the stem to remain stationary during operation, ideal for installations with limited vertical space, such as underground systems or industrial applications with confined spaces.
Our worm gear actuator provides a mechanical advantage for smooth operation, even under high-pressure or high-torque conditions. This design reduces the effort needed to operate the valve and provides precise control of the valve’s opening and closing positions. The metal seat and resilient wedge design ensure long-lasting performance and leak-tight sealing, even in challenging media conditions.
Made from durable cast iron (typically ASTM A126 or GGG50), this valve features a metal seat and resilient rubber encapsulated wedge for a durable and leak-tight seal. It is commonly used for water, oil, and gas pipeline isolation, especially where long-lasting, low-maintenance operation is a priority. The valve’s design makes it ideal for underground installations, as well as industrial and municipal applications requiring reliable flow control.
Application
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Municipal Water Supply – Isolation and regulation of potable water lines
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Oil & Gas – Flow control in fuel, natural gas, and chemical pipelines
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Power Generation – Boiler feed lines and cooling water systems
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HVAC Systems – Isolation of water lines in commercial or industrial buildings
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Fire Protection – Control of water flow in fire mains and sprinkler systems
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Wastewater Treatment – Isolation in sewage and sludge treatment pipelines
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Mining & Mineral Processing – Flow control for slurry and waste pipelines