Gate Valve Basics and Working Principles
2025-08-15
This comprehensive guide explores the fundamental concepts, working mechanisms, and technical specifications of gate valves. You'll learn about different gate valve types, their key components, operational principles, and how to select the right valve for your application. We'll also examine Zhongguan's premium gate valve product line with detailed technical comparisons.
1. Gate Valve Fundamentals and Types
Gate valves are linear motion valves designed for complete shutoff of fluid flow. Zhongguan manufactures three primary gate valve configurations:
Rising Stem Gate Valves (ZS Series)
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Visible stem indicates valve position
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Suitable for above-ground installations
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Standard sizes: 2" to 24"
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Pressure rating: 150# to 2500#
Non-Rising Stem Gate Valves (NRS Series)
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Compact design for limited spaces
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Ideal for underground applications
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Standard sizes: 2" to 12"
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Pressure rating: 150# to 900#
Wedge Gate Valves (WG Series)
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Superior sealing performance
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High-pressure applications
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Standard sizes: 2" to 36"
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Pressure rating: 150# to 2500#
2. Key Components and Working Mechanism
Major Components:
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Body: Contains the fluid pressure (cast steel, stainless steel)
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Bonnet: Provides access to internal parts
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Gate: The blocking element (solid, flexible, or split wedge)
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Stem: Transmits motion from actuator to gate
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Seat: Provides sealing surface for the gate
Operation Principle:
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Handwheel rotation moves stem vertically
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Stem motion raises or lowers the gate
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Gate moves perpendicular to flow direction
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Full open position creates minimal flow restriction
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Complete closure blocks all fluid passage
3. Zhongguan Gate Valve Technical Specifications
| Model | Size Range | Pressure Rating | Body Material | Temperature Range | Connection Type |
|---|---|---|---|---|---|
| ZG-ZS100 | 2"-24" | 150#-2500# | WCB | -29°C to 425°C | Flanged |
| ZG-NRS200 | 2"-12" | 150#-900# | CF8 | -196°C to 800°C | Socket Weld |
| ZG-WG300 | 2"-36" | 150#-2500# | LCB | -46°C to 345°C | Butt Weld |
| Feature | ZG-ZS100 | ZG-NRS200 | ZG-WG300 |
|---|---|---|---|
| Stem Material | 13Cr | 17-4PH | 316SS |
| Seat Material | 13%Cr | Stellite 6 | 316L |
| Operation | Manual/Gear | Manual | Actuated |
| Fire Safe | API 607 | API 607 | API 6FA |
4. Selection Guide and Applications
Industry Applications:
✔ Oil & Gas: WG series for high-pressure pipelines
✔ Water Treatment: ZS series for municipal systems
✔ Power Plants: NRS series for steam service
✔ Chemical Processing: Special alloy valves for corrosion resistance
Selection Criteria:
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Fluid characteristics (temperature, pressure, corrosiveness)
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Installation requirements (space constraints)
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Operation frequency (manual vs. automated)
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Industry standards (API, ANSI, ASME compliance)
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Maintenance considerations (accessibility)
For expert assistance in selecting the perfect gate valve for your specific needs, contact our engineering team today. With over 25 years of valve manufacturing experience, I personally guarantee Zhongguan valves deliver reliable performance in the most demanding applications.
Contact Us:
📧 Email: [email protected]
