| Customization: | Available |
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| Media: | Water |
| Temperature: | Ordinary Temperature |
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Crafted for excellence, our stainless steel/carbon steel flange lift check valves are sophisticated automatic solutions, ingeniously engineered to thwart reverse flow in pipelines. By leveraging disc weight and medium pressure, they ensure impeccable unidirectional flow control. These valves are quintessential for high-pressure or corrosive media systems, seamlessly integrating into water treatment, petrochemical, power generation, pharmaceutical, and a myriad of related industries. Explore the detailed product description below for a comprehensive understanding:
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 enhanced durability of carbon steel.
- Disc (Valve Core): Engineered with a stainless steel or PTFE-coated design; the sealing surfaces are fortressed with wear-resistant alloys such as Stellite to boldly resist erosion.
- Guidance System: Advanced precision-machined guide sleeves are employed to ensure smooth and impeccable vertical disc movement, effectively preventing any jamming or misalignment.
- Flange Connection: Adheres to ANSI, DIN, JIS standards ensuring superior compatibility;
flange face types (RF/FF) meticulously match the pipeline pressure ratings for seamless integration.
2. Operating Principle
- Forward Flow: The medium pressure adeptly lifts the disc, facilitating the valve's opening with grace.
- Reverse/Zero Flow: The disc swiftly closes under the influence of gravity and backpressure, effectively blocking any backflow with precision.
Technical Specifications
- Nominal Diameter (DN): DN15-DN600 which comprehensively covers the standard industrial pipeline sizes, ensuring versatile application.
- Pressure Rating: PN10-PN40 (or Class 150-Class 300); these ratings are tailored to meet a wide range of operational demands.
- Temperature Range:
Stainless Steel: -29°C to 425°C (dependent on material and seals), promising resilience under varying conditions.
Carbon Steel: -29°C to 350°C (necessitates anti-corrosion coating), ensuring enhanced longevity.
- Compatible Media: Designed for versatility, compatible with Water, steam, oils, weak acids/alkalis, and gases, provided material compatibility is confirmed.
Key Features
1. Reliable Backflow Prevention
With a vertical lift design, these valves promise a rapid response to reverse flow, safeguarding pumps, compressors, and other vital equipment effectively.
2. Corrosion Resistance & Durability
- Stainless steel is perfectly suited for corrosive environments; coated carbon steel significantly extends the service life.
- Featuring a hard-sealed structure, these valves fiercely withstand high temperatures, pressure, and particle erosion.
3. Low Flow Resistance
A straight-through flow path is meticulously designed to minimize pressure drop, significantly reducing energy consumption.
4. Easy Maintenance
Ingenious flange connections allow for quick and effortless disassembly; the removable bonnet simplifies disc cleaning and replacement.
Applications
- Water Treatment Systems: Ideal for pump outlets and backflow prevention in supply and drainage networks.
- Petrochemical & Energy: Perfect for crude oil/gas pipelines and refining installations.
- Power Generation: A robust choice for boiler feedwater and steam systems.
- Pharmaceutical/Food: Tailored for clean media pipelines, requiring SS 316L with an electropolished finish for optimal hygiene.
Selection Guide
1. Material Selection
- Stainless Steel: Choose for corrosive media such as acids/alkalis and for sanitary applications in the food and pharmaceutical sectors.
- Carbon Steel: Best suited for non-corrosive media like water, oil, and steam, offering a cost-effective solution.
2. Critical Parameters
- Specify the essential media type, with precise temperature and pressure ranges. Ensure to include DN size and conform to the specified flange standard, such as the globally recognized ANSI B16.5, for optimal compatibility and performance.
- Our custom options are designed to cater to specific requirements: Utilize austenitic stainless steel for robust performance under cryogenic conditions as low as -196°C. Additionally, choose guide sleeves to enhance efficiency in handling particle-laden media.
Installation & Maintenance
1. Installation
- Ensure the valve body arrow is precisely aligned with the medium flow direction; under no circumstance should the installation be reversed, as this could impact performance.
- This valve is engineered for seamless installation on both horizontal and vertical pipelines, with the stipulation that the disc axis must consistently remain vertical to ensure proper function.
2. Maintenance
- Conduct regular inspections of the sealing surfaces for any signs of wear. Additionally, thoroughly clean and remove any debris present within the valve cavity to maintain optimal operation.
- In environments with high humidity, it is crucial to ensure the integrity of the coating on carbon steel valves to prevent possible rust formation, safeguarding longevity and performance.
3. Precautions
- To prevent potential damage to the disc, avoid rapid cycling or exposure to high-velocity backflow, which can be detrimental to the valve's integrity.
- For enhanced system longevity, gradually initiate and halt systems to effectively mitigate the effects of water hammer, ensuring smooth operation.
| 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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