Detailed Explanation of NGT Valves and SGT Valves
24 April 2025
Detailed Explanation of NGT Valves and SGT Valves:
NGT valves and SGT valves are two common types of valves in the industrial field, typically used for fluid control (e.g., gases, liquids, etc.). Below are their definitions and key differences:
NGT Valve (Needle Globe Valve, Needle-Type Globe Valve)
Function: Precisely regulates minute flow rates using a slender, needle-like valve core (resembling a needle tip). It is a variant of the globe valve.
Features:
1.High-Precision Control: The small contact area between the valve core and seat makes it suitable for low-flow or high-pressure differential conditions.
2.Excellent Sealing: Often used for high-pressure, high-temperature, or corrosive media.
3.Compact Structure: Typically designed as straight-through or angle-type configurations.
Applications: Laboratory instruments, petrochemical industries, boiler systems, high-pressure gas pipelines, and other scenarios requiring fine flow adjustment.
SGT Valve (Slab Gate Valve, Slab-Type Gate Valve)
Function: Controls fluid flow on/off by raising or lowering a flat, slab-like gate. It is a type of gate valve.
Features:
1.Full-Bore Design: When open, the flow path is completely unobstructed, resulting in minimal pressure loss.
2.Bidirectional Sealing: The gate can seal on both sides, making it suitable for pipelines with bidirectional flow.
3.High Wear Resistance: Commonly used for media containing particles or with high viscosity.
4.Applications: Long-distance pipelines (e.g., oil, natural gas), wastewater treatment, mining, and other scenarios requiring quick shutoff and low flow resistance.
Key Differences:
NGT Valve
Structure: Needle-shaped valve core
Control Precision: High (fine flow adjustment)
Sealing Performance: Excellent (high-pressure sealing)
Pressure Loss: Significant (throttling effect)
Typical Applications: Laboratories,high-pressure systems
SGT Valve
Structure: Flat slab gate
Control Precision: On/off control (not for regulation)
Sealing Performance: Good (bidirectional sealing)
Pressure Loss: Minimal (full-bore design)
Typical Applications: Pipeline transport, high-flow systems
NGT valves and SGT valves are two common types of valves in the industrial field, typically used for fluid control (e.g., gases, liquids, etc.). Below are their definitions and key differences:
NGT Valve (Needle Globe Valve, Needle-Type Globe Valve)
Function: Precisely regulates minute flow rates using a slender, needle-like valve core (resembling a needle tip). It is a variant of the globe valve.
Features:
1.High-Precision Control: The small contact area between the valve core and seat makes it suitable for low-flow or high-pressure differential conditions.
2.Excellent Sealing: Often used for high-pressure, high-temperature, or corrosive media.
3.Compact Structure: Typically designed as straight-through or angle-type configurations.
Applications: Laboratory instruments, petrochemical industries, boiler systems, high-pressure gas pipelines, and other scenarios requiring fine flow adjustment.
SGT Valve (Slab Gate Valve, Slab-Type Gate Valve)
Function: Controls fluid flow on/off by raising or lowering a flat, slab-like gate. It is a type of gate valve.
Features:
1.Full-Bore Design: When open, the flow path is completely unobstructed, resulting in minimal pressure loss.
2.Bidirectional Sealing: The gate can seal on both sides, making it suitable for pipelines with bidirectional flow.
3.High Wear Resistance: Commonly used for media containing particles or with high viscosity.
4.Applications: Long-distance pipelines (e.g., oil, natural gas), wastewater treatment, mining, and other scenarios requiring quick shutoff and low flow resistance.
Key Differences:
NGT Valve
Structure: Needle-shaped valve core
Control Precision: High (fine flow adjustment)
Sealing Performance: Excellent (high-pressure sealing)
Pressure Loss: Significant (throttling effect)
Typical Applications: Laboratories,high-pressure systems
SGT Valve
Structure: Flat slab gate
Control Precision: On/off control (not for regulation)
Sealing Performance: Good (bidirectional sealing)
Pressure Loss: Minimal (full-bore design)
Typical Applications: Pipeline transport, high-flow systems