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China Gate Valve Suppliers - Ductile Iron, Stainless Steel & Rubber Metal Seated From Factory, API 602 Compliant
Product Specification
| Product Name | Gate Valve | Material | Ductile Iron/Carbon Steel / Stainless Steel |
| Type | Cap top | Medium | Water/oil/gas/steam/chemicals |
| Size | DN100-DN2400 | Seal | Rubber/Metal |
| Operation | gear/pneumatic/electric | Standard | DIN/ANSI/GOST/JIS/BS |
Product Description
Gate valves play an indispensable role in fluid transportation infrastructure, supporting the smooth flow of liquids and gases in diverse sectors. Material selection varies significantly by use case: brass is favored for small-sized valves due to its excellent corrosion resistance and easy machinability, while alloy steel is utilized for high-pressure operating conditions that demand exceptional durability.
Distinct structural traits define its reliable functionality. Gates come in two primary designs—wedge-shaped or parallel-faced—with wedge-shaped variants ensuring tight sealing when closed, even in low-pressure environments. The bonnet, an integral part of the structure, encapsulates the stem and preserves the valve’s operational integrity by preventing dust, moisture, and contaminants from entering internal components.
In real-world scenarios, they are widely installed in oil and gas pipelines, refineries, and chemical plants. Their primary function is to isolate specific pipeline sections for repair, inspection, or replacement tasks. Unlike many other valve types, they minimize flow resistance when fully open, optimizing fluid throughput and reducing energy consumption.
Proper operation involves careful handling of the manual handwheel. Gentle rotation is recommended when opening to avoid sudden pressure fluctuations that could damage the pipeline, and steady, gradual turning is required during closure to achieve a leak-proof seal that maintains system efficiency.
Frequently Asked Questions
What materials are used to manufacture these gate valves?
These gate valves are manufactured using high-quality materials including Ductile Iron, Carbon Steel, and Stainless Steel. Additionally, brass is used for small-sized valves, and alloy steel is selected for high-pressure operating environments.
What are the two primary designs available for the gate?
The gates come in two primary structural designs: wedge-shaped and parallel-faced. Wedge-shaped gates are particularly effective in ensuring a tight, reliable seal when closed, even in low-pressure environments.
What is the function of the valve bonnet?
The bonnet is an integral part of the valve structure that encapsulates the stem. It preserves the valve's operational integrity by preventing external contaminants like dust, moisture, and debris from entering the internal components.
Where are these gate valves typically installed?
These valves are widely installed in fluid transportation infrastructures, including oil and gas pipelines, chemical plants, and refineries, primarily to isolate specific pipeline sections for maintenance, inspection, or repair.
How should the manual handwheel be operated?
It should be operated with care: use a gentle rotation when opening the valve to avoid sudden pressure fluctuations that could damage the pipeline, and turn it steadily and gradually during closure to ensure a tight, leak-proof seal.