Hot Products
0102030405
China Gate Valve Flange End Suppliers - 2 to 14 Carbon Steel & Stainless Steel from Reliable Factory
Product Specifications
| Type | Gate Valve |
| Size | 2”-14“ |
| Pressure | 150LB |
| Connection | Flange End |
| Operation | Hand Wheel or Bevel Gear Box |
| Body Material | WCB/CF8M |
| Design Standard | API600 |
| FTF Dimension Standard | ASME B16.10 |
| Flange Dimension Standard | ASME B16.5 |
| Test Standard | API598 |
| Application | W.O.G |
Key Features
Shut-off Function
Gate valves are primarily used for on/off control rather than flow regulation. They are designed to either fully open or fully close the flow path.
Linear Motion
The gate (a flat or wedge-shaped disk) moves up and down in a straight line to control the flow. When the gate is lifted, the valve is open; when the gate is lowered, the valve is closed.
Full Bore Design
In the fully open position, gate valves provide a full bore, allowing for minimal pressure drop and unrestricted flow. This feature makes them suitable for applications where pressure drop needs to be minimized.
Bidirectional Flow
Gate valves can be used in both directions, meaning they can control flow from either side.
Tight Sealing
When fully closed, gate valves provide a tight seal, preventing any leakage. They are suitable for applications where tight shut-off is required.
Low Flow Resistance
Due to their full bore design and straight-through flow path, gate valves have low flow resistance when fully open.
Wide Range of Sizes
Gate valves are available in a wide range of sizes, making them suitable for various applications, from small residential plumbing to large industrial systems.
Material Versatility
Gate valves can be made from various materials, including cast iron, steel, stainless steel, bronze, and plastic, allowing them to be used in different environments and with different fluids.
Types of Gate
Gate valves can have different types of gates, such as wedge, parallel, knife, or slab gates, depending on the application and required sealing performance.
Not Ideal for Throttling
Gate valves are not recommended for throttling (partially open) applications because the gate can become damaged due to the high flow velocity and turbulence created when the valve is partially open.
Slow Operation
Gate valves typically require more time to operate compared to other types of valves, such as ball valves, because the gate must move a significant distance to fully open or close.
Applications Overview
Gate valves are commonly used in water supply systems, oil and gas pipelines, chemical processing, and other applications where a full flow and low flow resistance are important.
Applications
Water Supply System
Commonly used in water distribution systems for residential, commercial, and industrial buildings to control and isolate flow sections.
Oil and Gas Industry
Used in pipelines to transport crude oil, natural gas, and refined products. Suitable for high-pressure and high-temperature environments.
Chemical Processing
Ideal for handling corrosive and hazardous chemicals due to their tight sealing capabilities and full bore design.
Power Generation
Essential for controlling and isolating flow in steam, cooling water, and fuel supply systems under high-pressure conditions.
Wastewater Treatment
Employed in both influent and effluent systems to control sewage and treated water flow, handling large volumes efficiently.
Mining Industry
Selected for their durability in controlling the flow of abrasive slurries, tailings, and other high-volume fluids.
Petrochemical Industry
Manages the flow of various petrochemical products and by-products across a wide range of temperatures and pressures.
Pharmaceutical Industry
Utilized in processes requiring sterile and clean conditions to control the flow of fluids and gases in production lines.
Food and Beverage
Chosen for their sanitary design and ease of cleaning to regulate food-grade liquids, juices, and dairy products.
Marine & Shipbuilding
Specifically designed to control ballast water, fuel, and other fluid systems in demanding marine environments.
Fire Protection Systems
Installed as isolation valves in sprinkler and fire protection systems to shut off sections during system maintenance.
HVAC Systems
Regulates the flow of hot water or steam in heating, ventilation, and air conditioning systems.
Irrigation Systems
Controls the distribution of water to fields and crops in agricultural irrigation setups.
Technical Drawings
Frequently Asked Questions
What is the primary function of a gate valve?
Gate valves are specifically designed for isolation services (on/off control). They are intended to be fully opened or fully closed, allowing for unrestricted flow or complete shut-off. They should not be used for regulating or throttling fluid flow.
Why are gate valves not recommended for throttling?
When a gate valve is partially opened, the fluid velocity increases significantly through the gap. This high-speed flow causes severe turbulence, which can result in vibration, erosion, and permanent damage to both the gate and the valve seat, leading to leakage.
What are the benefits of a full bore gate valve design?
A full bore design means the internal port diameter of the valve is equal to the pipeline. When the valve is fully open, it creates a straight-through flow path, minimizing flow resistance and resulting in a very low pressure drop.
What body materials are available for these gate valves?
These gate valves are commonly manufactured using high-quality materials like Carbon Steel (WCB) for standard industrial applications, or Stainless Steel (CF8M) for applications requiring corrosion resistance and high-temperature performance.
Why does a gate valve have a slow operation time?
Because the gate must travel a distance equal to the full diameter of the pipe to open or close, it requires multiple turns of the handwheel. This slow operation is actually beneficial as it helps prevent water hammer in the pipeline.