Large diameter stainless steel flanged penstock gate
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DN1600 Large-Diameter Stainless Steel Flanged Gate Valve Product Introduction
Core Product Overview
This DN1600 large-diameter stainless steel flanged gate valve is a heavy-duty shut-off valve specially designed for large-diameter fluid pipeline systems. It is precision-manufactured with all-stainless steel and features a flanged connection and large-diameter compatible structure, enabling precise on-off control of media in pipelines. Suitable for complex industrial working conditions such as high temperature, high pressure and strong corrosion, the product is widely used in water supply and drainage projects, chemical industry, petroleum, electric power, metallurgy and other fields. It is the core equipment for realizing media cut-off and ensuring safe and stable operation of large-diameter pipelines.
Core Technical Parameters
| Parameter Item | Specific Specification |
|---|---|
| Nominal Diameter | DN1600 (1600mm) |
| Nominal Pressure | PN1.0~PN2.5MPa (Compatible with Class 150~300 American Standard rating) |
| Valve Body Material | 304/316L Stainless Steel (Duplex Steel 2205 customizable on demand) |
| Gate/Seat Seal | Stainless Steel Body Hardened Seal/Stellite Alloy Hardfacing (Metal Hard Seal) |
| Stem Material | 304/316 Stainless Steel (Nitrided Treatment, Corrosion and Wear Resistant) |
| Applicable Media | Water, Sewage, Steam, Oil Products, Acid-Alkali Solutions, Corrosive Fluids, etc. |
| Applicable Temperature | -29℃~200℃ (Up to 550℃ for metal seal version) |
| Connection Standard | National Standard GB/T 9113, American Standard ASME B16.5, Japanese Standard JIS (Customizable on demand) |
| Driving Mode | Manual Handwheel/Worm Gear Transmission (Electric and Pneumatic customization supported) |
| Sealing Grade | Complies with API 598 Grade VI Zero Leakage Standard |
Product Structure and Performance Advantages
1. All-Stainless Steel Anti-Corrosion Structure
Core components such as the valve body, gate plate and valve cover are integrally formed of 304/316L stainless steel. The 316L material contains molybdenum elements, which has ultra-strong corrosion resistance to chloride ions, acid-base salts and other corrosive media, making it suitable for strong corrosion scenarios such as chemical engineering and seawater desalination. The surface is finely polished to reduce media deposition and flow resistance, extending the service life of the equipment.
2. Large-Diameter Exclusive Seal Design
For the DN1600 extra-large diameter, a double gate self-adaptive structure is adopted. The gate plate compensates for thermal deformation and installation deviation of the valve body through a wedge design, realizing zero-leakage bidirectional sealing. The metal hard sealing surface is treated with Stellite alloy hardfacing, with hardness up to HRC45-50, which is wear-resistant and high temperature resistant, completely solving the pain point of easy seal failure in large-diameter valves.
3. Efficient Transmission and Convenient Operation
Equipped with an external screw trapezoidal thread transmission system, the exposed length of the valve stem directly reflects the valve opening, facilitating on-site monitoring and maintenance. The combination of handwheel and worm gear reduction mechanism greatly reduces the operating torque, allowing a single person to open and close the DN1600 large-diameter valve. Electric or pneumatic actuators can be optionally installed to adapt to automatic control systems and realize remote precise control.
4. High Reliability and Low Maintenance
The straight-through flow channel design has a flow resistance coefficient ≤0.1 when fully open, reducing media energy loss. The triple seal structure (flexible graphite packing + metal corrugated ring + gland) effectively reduces the risk of external leakage of the valve stem. The valve body adopts a reinforced wall thickness design, resistant to high pressure and deformation, meeting the pressure bearing requirements of large-diameter pipelines. The overall structure is easy to disassemble and assemble, and the gate plate and valve stem can be extracted as a whole without disassembling the pipeline, reducing later maintenance costs.
Application Scenario Details
- Municipal Water Supply and Drainage Engineering: Main pipes of urban water supply networks, medium cut-off of large-diameter pipelines in sewage treatment plants, suitable for various water qualities such as sewage and clean water;
- Chemical Industry: Medium cut-off of acid-base solution and chemical raw material transmission pipelines, stable operation in strong corrosive media environment to ensure production safety;
- Petrochemical Industry: Crude oil and product oil transmission pipelines, high temperature and high pressure resistant, adapting to complex working conditions of oil fields and refineries;
- Power Industry: Medium cut-off of large-diameter pipelines in power plant circulating water and cooling water systems, temperature and corrosion resistant, adapting to high load operation of power plants;
- Metallurgical Industry: Medium cut-off of metallurgical wastewater and industrial fluid transmission, resistant to particle wear, meeting the harsh working condition requirements of the metallurgical industry.
Product Customization and Service
We provide non-standard customization services, and can adjust materials (such as duplex steel, Hastelloy), driving methods (electric/pneumatic/hydraulic), flange standards and sealing forms according to the actual working conditions of customers. We provide full-process technical support, including selection guidance, installation and commissioning, and after-sales maintenance, to ensure that the product is compatible with various large-diameter pipeline systems and meets the personalized needs of different industries.
