| Customization: | Available |
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| Media: | Water |
| Temperature: | Ordinary Temperature |
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Our top-tier stainless steel and carbon steel flange lift check valves are intelligently engineered to automatically halt reverse flow in pipelines. By harnessing the force of the disc weight and the medium's pressure, these valves ensure seamless unidirectional flow control. Perfectly suited for high-pressure or corrosive media systems, they find their indispensable applications in water treatment, petrochemical, power generation, pharmaceutical, and more. Dive into a comprehensive product description below:
Core Structure & Operating Principle
1. Structural Components
- Body & Bonnet: Expertly crafted from stainless steel (304, 316, 316L) or carbon steel (WCB, WCC). Optional anti-corrosion coatings like galvanizing are available for carbon steel.
- Disc (Valve Core): Features a stainless steel or PTFE-coated design, with sealing surfaces hard-faced using robust, wear-resistant alloys such as Stellite, ensuring resilience against erosion.
- Guidance System: Precision-engineered guide sleeves guarantee smooth vertical disc movement, eliminating risks of jamming or misalignment.
- Flange Connection: Adheres to ANSI, DIN, JIS standards.
Flange face types (RF/FF) are expertly aligned with pipeline pressure ratings.
2. Operating Principle
- Forward Flow: The medium's pressure elegantly lifts the disc, opening the valve effortlessly.
- Reverse/Zero Flow: The disc closes swiftly under the combined forces of gravity and backpressure, effectively blocking any backflow.
Technical Specifications
- Nominal Diameter (DN): DN15-DN600, accommodating a wide array of standard industrial pipeline sizes.
- Pressure Rating: PN10-PN40, or equivalently Class 150-Class 300.
- Temperature Range:
For Stainless Steel: From -29°C to 425°C, varying with material and seals.
For Carbon Steel: Ranges from -29°C to 350°C, necessitating anti-corrosion coating.
- Compatible Media: Accommodates water, steam, oils, weak acids/alkalis, and gases, considering material compatibility.
Key Features
1. Reliable Backflow Prevention
The vertical lift design guarantees a lightning-fast response to reverse flow, safeguarding pumps, compressors, and other critical equipment.
2. Corrosion Resistance & Durability
- Stainless steel thrives in corrosive environments, while coated carbon steel extends its service life significantly.
- The hard-sealed structure is adept at withstanding high temperatures, pressures, and particle erosion.
3. Low Flow Resistance
A straight-through flow path reduces pressure drop, optimizing energy consumption.
4. Easy Maintenance
Flange connections facilitate quick disassembly, and the removable bonnet allows for straightforward disc cleaning or replacement.
Applications
- Water Treatment Systems: Ideal for pump outlets and backflow prevention within supply/drainage networks.
- Petrochemical & Energy: Essential for crude oil/gas pipelines and refining installations.
- Power Generation: Perfect for boiler feedwater and steam systems.
- Pharmaceutical/Food: Suited for clean media pipelines, requiring SS 316L with an electropolished finish.
Selection Guide
1. Material Selection
- Stainless Steel: Best for corrosive media (acids/alkalis) and sanitary applications (food/pharma).
- Carbon Steel: Ideal for non-corrosive media (water, oil, steam) and projects with cost considerations.
2. Critical Parameters
- Clearly specify the type of media, along with the operating temperature and pressure range, including the designated DN size and the precise flange standard, such as ANSI B16.5, to ensure compatibility and performance.
- Explore our custom options, including the use of austenitic stainless steel specifically for challenging cryogenic conditions as low as -196°C, and the inclusion of guide sleeves for handling particle-laden media, ensuring efficiency and reliability.
Installation & Maintenance
1. Installation
- Ensure the valve body arrow aligns perfectly with the direction of the medium flow; remember, reverse installation is strictly prohibited to maintain optimal functionality.
- Designed for both horizontal and vertical pipelines, the disc axis must always be kept vertical, ensuring uncompromised operation.
2. Maintenance
- Conduct regular inspections of the sealing surfaces for any signs of wear and make sure to clear out any debris from the valve cavity to maintain effectiveness.
- Routinely check the integrity of the coating on carbon steel valves, especially in humid environments, to prevent rust and ensure longevity.
3. Precautions
- To avoid damaging the disc, steer clear of rapid cycling or exposure to high-velocity backflow.
- Initiate and cease systems gradually to effectively reduce water hammer effects, protecting the infrastructure.
| 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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