H74 Stainless Steel Wafer-Type Single-Disc Check Valve
Product Description
Introducing the H74 stainless steel wafer-type single-disc check valve, a marvel of modern engineering crafted for the most demanding space-constrained environments. This ultra-compact valve integrates a sleek design with robust performance, offering versatile solutions across various applications. Below, we delve into the detailed product description:
1. Structural and Design Features
- Ultra-Thin Profile: With a structural length reduced to just 1/4~1/8 of traditional flange check valves, and a significant weight reduction (approximately 1/4~1/20 of conventional valves), this valve is crafted for effortless installation and handling, even in the most confined spaces.
- Single-Disc Swing-Type Design: This innovative design is equipped with a single disc, integrated with an O-ring seal and spring-assisted closure mechanism. It ensures rapid response, exceptional sealing, and prompt closing to minimize the risk of water hammer effects.
- Flexible Installation: Designed for ultimate adaptability, this valve is suitable for horizontal or vertical mounting without the need for additional supports, ensuring seamless integration into diverse pipeline layouts.
2. Technical Specifications
- Nominal Diameter: DN50~DN1000, accommodating an extensive range of pipeline sizes to meet your specific requirements.
- Pressure Rating: PN10~PN40 (GB standard) or 150Lb~300Lb (ASME), with a robust maximum working pressure of 4.0MPa, ensuring reliability under high-pressure conditions.
- Temperature Range:
- Hard-sealed valves: Capable of withstanding temperatures up to 400°C, making them ideal for high-temperature applications.
- Soft-sealed valves (e.g., rubber): Offering a versatile operating range from -29°C to 250°C, depending on the sealing material selected, to suit a variety of application needs.
- Test Pressure:
- Shell test pressure: Designed to withstand a test pressure of 1.5× nominal pressure, ensuring structural integrity and performance.
- Seal test pressure: Assured at 1.1× nominal pressure, guaranteeing exceptional sealing efficacy.
3. Material and Sealing Performance
- Body Material: Choose from stainless steel (304, 316, 316L), carbon steel (WCB), or copper, providing excellent corrosion resistance tailored for diverse media.
- Sealing Materials: Options include nitrile rubber (NBR), fluororubber (FKM), EPDM, or PTFE, with hard-sealed variants utilizing stainless steel, making them suitable for aggressive media such as acids, alkalis, oils, and steam.
4. Applications
- Compatible Media: This valve is engineered to handle water, oils, steam, acidic/alkaline fluids (e.g., sulfuric acid, hydrochloric acid), and strong oxidizers (e.g., aqua regia).
- Typical Use Cases: Ideal for urban water supply/drainage systems, petrochemical plants, metallurgy, firefighting systems, power stations, and pharmaceutical industries where backflow prevention is critical.
5. Key Advantages
- Low Flow Resistance: Engineered for efficiency, the smooth flow passage ensures minimal pressure drop during valve opening, reducing energy consumption and operational costs.
- High Reliability: The robust and compact design minimizes the impact on closing, ensuring a long service life with reduced maintenance needs.
- Customization Options: Offering multiple models such as H74H, H74W, H74X, each designed to meet various sealing requirements and international standards (GB, ASME).
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.