| Customization: | Available |
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| Media: | Water |
| Temperature: | Ordinary Temperature |
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Introducing our Stainless Steel/Carbon Steel Flange Lift Check Valves - a cutting-edge solution engineered to safeguard your pipelines with automatic precision. These valves are meticulously crafted to halt reverse flow, harnessing the power of disc weight and medium pressure to ensure seamless unidirectional flow control. Perfectly suited for high-pressure or corrosive environments, these valves find their place in an array of industries including water treatment, petrochemical, power generation, and pharmaceuticals. Explore the detailed features that make this product an industry favorite:
Core Structure & Operating Principle
1. Structural Components
- Body & Bonnet: Meticulously constructed from premium stainless steel (304, 316, 316L) or robust carbon steel (WCB, WCC), with optional anti-corrosion coatings like galvanizing for carbon steel.
- Disc (Valve Core): Available in stainless steel or PTFE-coated designs; sealing surfaces are enhanced with hard-faced, wear-resistant alloys such as Stellite to endure erosive conditions.
-Guidance System: Engineered with precision-machined guide sleeves, ensuring seamless vertical disc movement, eliminating risks of jamming or misalignment.
- Flange Connection: Compliant with ANSI, DIN, JIS standards, designed to match varying pipeline pressure ratings with available flange face types (RF/FF).
2. Operating Principle
- Forward Flow: The medium pressure gracefully lifts the disc, allowing the valve to open effortlessly.
-Reverse/Zero Flow: The disc swiftly closes under the influence of gravity and backpressure, effectively blocking any backflow.
Technical Specifications
- Nominal Diameter (DN): Available from DN15 to DN600, accommodating standard industrial pipeline sizes.
- Pressure Rating: Engineered to handle PN10-PN40 or Class 150-Class 300 pressure ratings; tailored for diverse applications.
- Temperature Range:
Stainless Steel: Capable of operating between -29°C to 425°C, varying with material and seals for optimal performance.
Carbon Steel: Operates efficiently from -29°C to 350°C, necessitating anti-corrosion coating for longevity.
- Compatible Media: Versatile compatibility with water, steam, oils, weak acids/alkalis, and gases, ensuring material compatibility for diverse uses.
Key Features
1. Reliable Backflow Prevention
The vertical lift design guarantees a rapid and reliable response to reverse flow, providing critical protection for pumps, compressors, and other vital equipment.
2. Corrosion Resistance & Durability
- Stainless steel construction is ideal for corrosive environments, while coated carbon steel enhances service life.
- The hard-sealed structure is engineered to withstand high temperatures, pressure, and particle erosion, ensuring durability.
3. Low Flow Resistance
A straight-through flow path is designed to minimize pressure drop, leading to reduced energy consumption and improved efficiency.
4. Easy Maintenance
Flange connections are designed for quick disassembly, and a removable bonnet facilitates easy disc cleaning and replacement.
Applications
- Water Treatment Systems: Essential for pump outlets and backflow prevention in supply and drainage networks.
- Petrochemical & Energy: Perfect for crude oil, gas pipelines, and refining installations.
- Power Generation: Suitable for boiler feedwater and steam systems, providing reliable performance.
- Pharmaceutical/Food: Ideal for clean media pipelines, requiring SS 316L with an electropolished finish for superior sanitation.
Selection Guide
1. Material Selection
- Stainless Steel: Best suited for corrosive media such as acids/alkalis and sanitary applications in the food or pharmaceutical industries.
- Carbon Steel: Recommended for non-corrosive media like water, oil, and steam, offering a cost-effective solution for budget-conscious projects.
2. Critical Parameters
- Clearly specify the type of media, the acceptable temperature and pressure range, the DN size, and the specific flange standard such as ANSI B16.5 to ensure optimal compatibility and performance.
- Customization options include the use of Austenitic stainless steel, ideal for withstanding cryogenic conditions as low as -196°C, and guide sleeves designed specifically for handling media with particulate content.
Installation & Maintenance
1. Installation
- Ensure the valve body arrow is perfectly aligned with the flow direction of the medium; **reverse installation is strictly forbidden** to maintain functionality.
- This valve is versatile for horizontal or vertical pipelines; however, it is crucial that the disc axis stays vertical to ensure proper operation.
2. Maintenance
- Conduct regular inspections of the sealing surfaces for wear and diligently remove any debris from within the valve cavity to maintain peak performance.
- In humid environments, frequently examine the coating integrity of carbon steel valves to prevent rust and maintain their protective quality.
3. Precautions
- To avoid potential disc damage, steer clear of rapid cycling or exposure to high-velocity backflow.
- Implement gradual start and stop procedures for systems to effectively reduce the risk of water hammer effects, ensuring the longevity and reliability of the valve.
| Working pressure | PN16~PN40 OR 150LB~300LB |
| Suitable medium | Water, gas, air and some corrosive liquid |
| Investment | Casting body and cap |
| Delivery time | Usual 15 days |
| Shipping port | NingBo,YiWu |
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