Stainless Steel/Carbon Steel H76 Wafer-Type Dual Disc Check Valve
Product Description
Product Overview
The H76 Wafer-Type Dual Disc Check Valve is an automatic valve designed to prevent medium backflow. Featuring a wafer-style connection, it is widely used in pipeline systems for petroleum, chemical, power, water supply, and drainage applications. The valve body is available in stainless steel (e.g., 304, 316) or carbon steel (WCB), offering corrosion resistance, high-pressure tolerance, and responsive opening/closing performance.
Structure and Working Principle
- Dual Disc Design: Two symmetrical discs are pre-tensioned by springs to assist rapid closure, minimizing water hammer impact.
- Wafer-Style Installation: A flangeless valve body is clamped between pipeline flanges via bolts, saving space and ideal for compact piping layouts.
- Operation: During forward flow, fluid pressure opens the discs; upon flow cessation or reversal, the discs close instantly under spring force and reverse pressure to block backflow.
Key Features
- Low Water Hammer Effect: Split-disc design reduces closing impact, protecting pipeline integrity.
- Lightweight: 30%~50% lighter than conventional check valves, ensuring easy installation and maintenance.
- Reliable Sealing: Seal faces use rubber, PTFE, or metal-to-metal hard sealing, compatible with water, steam, oils, and more.
- Versatility: Stainless steel suits corrosive environments (e.g., seawater, acids); carbon steel offers cost efficiency for standard conditions.
Applications
- Municipal water supply and drainage systems
- Petrochemical pipelines
- Thermal power plant cooling water circulation
- HVAC systems
- Marine and offshore platforms
Selection and Installation Guidelines
- Selection Criteria: Choose material and seal type based on medium (corrosivity, temperature), pressure, and pipe size.
- Installation Direction: Align valve arrow with flow direction; suitable for horizontal or vertical mounting.
- Maintenance: Regularly inspect disc springs and seal surfaces; prevent debris accumulation.
The H76 Wafer-Type Dual Disc Check Valve stands out for its compact design, rapid response, and low maintenance, making it ideal for backflow prevention in space-constrained or high-frequency systems. Optimal performance requires matching materials and sealing solutions to specific operating conditions.
Product Parameters
Pressure Rating |
PN10~PN40 (or Class 150~300) |
Nominal Diameter |
DN50~DN600 (2"~24") |
Temperature Range: |
Stainless Steel: -29ºC~200ºC (rubber seal) / 425ºC (metal seal) |
|
Carbon Steel: -29ºC~425ºC |
Connection Standards |
GB, ANSI, DIN, JIS wafer flange dimensions. |
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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.