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| Media: | Water |
| Temperature: | Ordinary Temperature |
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Discover the unparalleled reliability and innovation crafted in our stainless steel and carbon steel flange lift check valves. Engineered to perfection, these automatic valves are masters in preventing reverse flow across your pipeline systems. Harnessing the power of disc weight and medium pressure, they assure unidirectional flow control, making them indispensable for high-pressure or corrosive environments, especially in the realms of water treatment, petrochemical, power generation, and pharmaceuticals. Dive into the details below to explore the exceptional features that these valves bring to your industrial applications:
Core Structure & Operating Principle
1. Structural Components
- Body & Bonnet: Impeccably crafted from the finest stainless steel (304, 316, 316L) or robust carbon steel (WCB, WCC). Elevate durability with optional anti-corrosion coatings, including galvanizing for carbon steel.
- Disc (Valve Core): Purposefully designed with stainless steel or PTFE coatings, these discs boast sealing surfaces reinforced with wear-resistant alloys like Stellite, ensuring they stand up to erosion.
- Guidance System: Experience seamless performance with precision-machined guide sleeves that guarantee smooth, vertical disc movement while eliminating jamming and misalignment.
- Flange Connection: Adheres to ANSI, DIN, and JIS standards with unparalleled precision.
Flange face types (RF/FF) are engineered to align perfectly with pipeline pressure ratings.
2. Operating Principle
- Forward Flow: The powerful medium pressure elegantly lifts the disc, effortlessly opening the valve for a seamless flow.
- Reverse/Zero Flow: Witness the rapid and reliable closure of the disc, driven by gravity and backpressure, to effectively block any unwanted backflow.
Technical Specifications
- Nominal Diameter (DN): DN15-DN600, accommodating a comprehensive range of standard industrial pipeline sizes.
- Pressure Rating: PN10-PN40, or opt for Class 150-Class 300, tailored to meet diverse operational demands.
- Temperature Range:
Stainless Steel: Withstands conditions from -29°C to 425°C, varying with material and sealing elements.
Carbon Steel: Endures temperatures from -29°C to 350°C, provided with a protective anti-corrosion coating.
- Compatible Media: Designed for versatility, capable of handling water, steam, oils, weak acids/alkalis, and gases, necessitating material compatibility.
Key Features
1. Reliable Backflow Prevention
Ingeniously crafted with a vertical lift design for a swift response to reverse flow, ensuring the safeguarding of pumps, compressors, and vital equipment.
2. Corrosion Resistance & Durability
- Stainless steel is the ideal choice for corrosive environments, while coated carbon steel ensures extended service life.
- The rugged hard-sealed structure triumphs over high temperatures, pressure, and particle erosion.
3. Low Flow Resistance
Designed with a straight-through flow path to significantly minimize pressure drop and optimize energy consumption.
4. Easy Maintenance
Flange connections facilitate quick disassembly, while the removable bonnet allows for effortless disc cleaning and replacement.
Applications
- Water Treatment Systems: The perfect choice for pump outlets and backflow prevention in supply and drainage networks.
- Petrochemical & Energy: From crude oil and gas pipelines to refining installations, these valves excel in demanding environments.
- Power Generation: Reliable performance in boiler feedwater and steam systems.
- Pharmaceutical/Food: Ideal for clean media pipelines, requiring SS 316L with an electropolished finish for optimal sanitary conditions.
Selection Guide
1. Material Selection
- Stainless Steel: Perfectly suited for handling corrosive media such as acids and alkalis, as well as sanitary applications in the food and pharmaceutical sectors.
- Carbon Steel: A cost-effective solution for non-corrosive media including water, oil, and steam, ideal for budget-conscious projects.
2. Critical Parameters
- Clearly define the type of media, including its temperature and pressure range. Specify the DN size alongside the flange standard (such as ANSI B16.5) for optimal compatibility and performance.
- Explore tailored options: Choose austenitic stainless steel for challenges posed by cryogenic conditions reaching as low as -196°C. Opt for guide sleeves to ensure seamless operation in environments with particle-laden media.
Installation & Maintenance
1. Installation
- Ensure the valve body arrow is perfectly aligned with the medium flow direction; **reverse installation is strictly prohibited** to maintain optimal performance.
- Versatile for both horizontal and vertical pipelines, provided the disc axis remains vertical to ensure efficient functionality.
2. Maintenance
- Conduct regular inspections to assess the sealing surfaces for any wear. Promptly remove debris within the valve cavity to maintain longevity and efficiency.
- In humid environments, consistently check the coating integrity of carbon steel valves to avert rust and ensure durability.
3. Precautions
- To prevent damage to the disc, avoid scenarios involving rapid cycling or high-velocity backflow.
- Initiate or shut down systems gradually to effectively mitigate any potential effects of water hammer.
| 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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