Stainless Steel/Carbon Steel Flange Lift Check Valve

• Customization: Available
• Media: Water
• Temperature: Ordinary Temperature
• Model NO.: H41 Check Valve
• Material: Stainless Steel
• Connection Form: Flange
• Structure: Swing
• Pressure: Normal
• Function: Swing
• Sealing Form: Soft
• Flow Direction: Unidirection
• Standard: GB
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Applying Mediem: Water Oil Gas
• MOQ: 1 PC
• Shipment Time: 15 Days
• Connection Ends: Flange
• Transport Package: Carton, Plywood Case
• Specification: 1/2"~12"
• Trademark: SAFETYSUS
• Origin: Wenzhou
• HS Code: 8481804090
• Production Capacity: 1000PCS/Week
• Package Size: 20.00cm * 30.00cm * 20.00cm
• Package Gross Weight: 3.000kg

Product Description

Stainless Steel/Carbon Steel Flange Lift Check Valve

Product Description

  Stainless steel/carbon steel flange lift check valves are automatic valves designed to prevent reverse flow in pipelines. Utilizing disc weight and medium pressure for unidirectional flow control, they are ideal for high-pressure or corrosive media systems in water treatment, petrochemical, power generation, pharmaceutical, and related industries. Below is a detailed product description:  


Core Structure & Operating Principle
1. Structural Components  
   - Body & Bonnet: Constructed from stainless steel (304, 316, 316L) or carbon steel (WCB, WCC), with optional anti-corrosion coatings (e.g., galvanizing for carbon steel).  
   - Disc (Valve Core): Stainless steel or PTFE-coated design; sealing surfaces are hard-faced with wear-resistant alloys (e.g., Stellite) to withstand erosion.  
   -Guidance System: Precision-machined guide sleeves ensure vertical disc movement, preventing jamming or misalignment.  
   - Flange Connection: Complies with ANSI, DIN, JIS standards;
                                     flange face types (RF/FF) match pipeline pressure ratings.  

2. Operating Principle  
   - Forward Flow: Medium pressure lifts the disc, opening the valve.  
   -Reverse/Zero Flow: Disc closes rapidly under gravity and backpressure, blocking backflow.  



Technical Specifications 
- Nominal Diameter (DN): DN15-DN600 (covers standard industrial pipeline sizes).  
- Pressure Rating: PN10-PN40 (or Class 150-Class 300);
- Temperature Range:  
   Stainless Steel: -29°C to 425°C (varies with material and seals).  
   Carbon Steel: -29°C to 350°C (requires anti-corrosion coating).  
- Compatible Media: Water, steam, oils, weak acids/alkalis, gases (material compatibility required).  



Key Features
1. Reliable Backflow Prevention 
   Vertical lift design ensures rapid response to reverse flow, protecting pumps, compressors, and other equipment.  
2. Corrosion Resistance & Durability  
   - Stainless steel suits corrosive environments; coated carbon steel extends service life.  
   - Hard-sealed structure withstands high temperatures, pressure, and particle erosion.  
3. Low Flow Resistance
   Straight-through flow path minimizes pressure drop, reducing energy consumption.  
4. Easy Maintenance 
   Flange connections allow quick disassembly; removable bonnet facilitates disc cleaning/replacement.  


Applications 
- Water Treatment Systems: Pump outlets, backflow prevention in supply/drainage networks.  
- Petrochemical & Energy: Crude oil/gas pipelines, refining installations.  
- Power Generation: Boiler feedwater, steam systems.  
- Pharmaceutical/Food: Clean media pipelines (requires SS 316L with electropolished finish).  


Selection Guide 
1. Material Selection
   - Stainless Steel: For corrosive media (acids/alkalis), sanitary applications (food/pharma).  
   - Carbon Steel: Non-corrosive media (water, oil, steam), cost-sensitive projects.  
2. Critical Parameters  
   - Specify media type, temperature/pressure range, DN size, and flange standard (e.g., ANSI B16.5).  
   - Custom options: Austenitic stainless steel for cryogenic conditions (-196°C); guide sleeves for particle-laden media.  


Installation & Maintenance
1. Installation
   - Align valve body arrow with medium flow direction; **reverse installation is strictly prohibited**.  
   - Suitable for horizontal/vertical pipelines, but disc axis must remain vertical.  
2. Maintenance 
   - Regularly inspect sealing surfaces for wear and remove debris from the valve cavity.  
   - Check coating integrity on carbon steel valves in humid environments to prevent rust.  
3. Precautions 
   - Avoid rapid cycling or high-velocity backflow to prevent disc damage.  
   - Gradually start/stop systems to mitigate water hammer effects.  

 

Detailed Photos

 

 

Product Parameters

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

 

Certifications

 

Company Profile

 

FAQ

Q:How do you pack?
A:Plastic bags-------(Paper boxes)-------Cartons-------Plywood cases

Q:How long is the quality guarantee period?
A:We supply 6 to 12 months for quality guarantee according to customers' using frequency.

Q:How can you guarantee the quality of products?
A:First of all, we have the numerical control device to manufacture products accurately. Then our quality inspectors will test products one by one to make sure every flange or fitting we sell is qualified.

Q:How can I check your factory situation while it's difficult for me to come to China.
A:We have photos and videos on our website, It shows every step of the manufacturing.
Alternatively, I can take videos or photos of our factory and send them to you.

Q:What is your lead time?
A:It's around 15 days normally. If we have the products in stock, it will be about 5days.

Q:Can you print our Logo on the valves/Fittings?
A:Yes, we can totally produce products according to your this kind special request, even manufacture it based on your drawing

Q:Are samples available to be sent with free?
A:It depends on what product you need. There are hundreds of products we sell. You can contact us for particular answer.

Q:Do you have a minimum quantity of the products?
A:No, we will build business with you with even 1pc. We believe this cooperation will be a long-term relationship for our high quality, competitive price and good after-sale service.

Q:Where are the main markets for your products?
A:We hope to make business with companies from all over the world. And for now, our flanges and fittings have been exported to especially in North America, South America, South Asia, Europe and Middle East.

Q:Are you a factory or trading company?
A:We are a factory specialized in manufacturing flange and fitting over 10 years.