| Customization: | Available |
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| Media: | Water |
| Temperature: | Ordinary Temperature |
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Introducing our premium Stainless Steel/Carbon Steel Flange Lift Check Valves, expertly engineered as automatic solutions to combat reverse flow in your pipeline systems. These valves skillfully utilize disc weight alongside medium pressure to ensure one-way flow control, rendering them indispensable in high-pressure or corrosive media environments. Perfectly suited for application in water treatment, petrochemical, power generation, pharmaceutical, and related sectors. Discover the comprehensive product details below:
Core Structure & Operating Principle
1. Structural Components
- Body & Bonnet: Crafted from premium stainless steel (304, 316, 316L) or robust carbon steel (WCB, WCC), with optional anti-corrosion finishes like galvanizing for enhanced durability in carbon steel.
- Disc (Valve Core): Designed with stainless steel or PTFE coatings, the sealing surfaces are expertly hard-faced with wear-resistant alloys such as Stellite, ensuring long-lasting resilience against erosion.
-Guidance System: Engineered with precision-machined guide sleeves to assure smooth vertical disc movement, effectively preventing any jamming or misalignment issues.
- Flange Connection: Adheres to ANSI, DIN, JIS standards;
flange face types (RF/FF) are matched to pipeline pressure ratings, ensuring seamless integration and operation.
2. Operating Principle
- Forward Flow: The medium pressure elevates the disc, allowing the valve to open efficiently.
-Reverse/Zero Flow: The disc closes swiftly under the influence of gravity and backpressure, effectively preventing any backflow.
Technical Specifications
- Nominal Diameter (DN): DN15-DN600, covering a broad range of standard industrial pipeline sizes.
- Pressure Rating: PN10-PN40 (or Class 150-Class 300), delivering robust performance under varying pressure conditions;
- Temperature Range:
Stainless Steel: -29°C to 425°C, adaptable based on material and seals, perfectly suited for wide-ranging temperature applications.
Carbon Steel: -29°C to 350°C, enhanced with anti-corrosion coatings to withstand challenging conditions.
- Compatible Media: Efficiently handles water, steam, oils, weak acids/alkalis, and gases, with required material compatibility.
Key Features
1. Reliable Backflow Prevention
Our vertical lift design offers an immediate response to reverse flow, ensuring protection for pumps, compressors, and additional valuable equipment.
2. Corrosion Resistance & Durability
- Stainless steel excels in corrosive environments while coated carbon steel significantly extends equipment lifespan.
- The hard-sealed structure is designed to endure high temperatures, pressure, and particle erosion, offering unmatched durability.
3. Low Flow Resistance
The straight-through flow path is optimized to minimize pressure drop, thereby reducing energy consumption and costs.
4. Easy Maintenance
Flange connections feature a design that facilitates quick disassembly, while removable bonnets enable straightforward disc cleaning and replacement.
Applications
- Water Treatment Systems: Ensures efficient pump outlet operation and reliable backflow prevention in supply and drainage networks.
- Petrochemical & Energy: Essential for crude oil and gas pipelines, as well as refining installations, offering robust performance.
- Power Generation: Integral for boiler feedwater and steam systems, providing reliable and efficient operation.
- Pharmaceutical/Food: Designed for clean media pipelines, requiring SS 316L with an electropolished finish for optimal performance.
Selection Guide
1. Material Selection
- Stainless Steel: Ideal for handling corrosive media like acids and alkalis, and perfect for sanitary applications in the food and pharmaceutical industries.
- Carbon Steel: Best suited for non-corrosive media such as water, oil, and steam, especially in cost-sensitive projects.
2. Critical Parameters
- Ensure a comprehensive understanding of the operational media type, the full spectrum of temperature and pressure ranges, the appropriate DN size, and adhere to the flange standard, such as ANSI B16.5, for optimal application.
- Tailor-made options are available: Opt for Austenitic stainless steel for superior performance in cryogenic conditions as low as -196°C; choose guide sleeves specifically designed for handling particle-laden media efficiently.
Installation & Maintenance
1. Installation
- It is crucial to ensure that the arrow on the valve body is precisely aligned with the direction of the medium's flow; **any form of reverse installation is strictly prohibited** to maintain system integrity.
- The valve is versatile for use in both horizontal and vertical pipelines; however, it is essential that the disc axis remains vertical to ensure proper functionality.
2. Maintenance
- Conduct regular inspections of the sealing surfaces to detect any signs of wear, and diligently remove any debris that may accumulate in the valve cavity to maintain optimal performance.
- Regularly assess the coating integrity on carbon steel valves operating in humid environments to prevent rust and ensure long-lasting durability.
3. Precautions
- Avoid rapid cycling or high-velocity backflow as these can lead to disc damage; exercise caution and maintain controlled operations.
- Implement a gradual start/stop of systems to effectively mitigate potential water hammer effects, ensuring smooth and safe operational transitions.
| 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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