H74 Stainless Steel Wafer-Type Single-Disc Check Valve
Product Description
Introducing the H74 stainless steel wafer-type single-disc check valve - an engineering marvel in valve design, perfect for space-limited installations. This ultra-compact valve combines a sleek structure with dependable performance, offering unparalleled versatility. Here's an in-depth look at its features and capabilities:
1. Structural and Design Features
- Ultra-Thin Profile: This valve's slender form, with a structural length only 1/4~1/8 of traditional flange check valves and significantly reduced weight (approximately 1/4~1/20 of conventional valves), ensures effortless installation and maneuverability in confined areas.
- Single-Disc Swing-Type Design: Featuring a sophisticated single disc with an integrated O-ring seal and spring-assisted closure, it guarantees swift responsiveness, superior sealing, and rapid closure, effectively minimizing water hammer effects.
- Flexible Installation: Designed for seamless horizontal or vertical mounting without the need for additional supports, this valve adapts effortlessly to a variety of pipeline configurations.
2. Technical Specifications
- Nominal Diameter: Ranging from DN50 to DN1000, this valve accommodates an extensive range of pipeline sizes with ease.
- Pressure Rating: With a rating of PN10~PN40 (GB standard) or 150Lb~300Lb (ASME), this valve supports a maximum working pressure of 4.0MPa, ensuring robust performance under demanding conditions.
- Temperature Range:
- Hard-sealed valves: Capable of handling temperatures up to 400°C, perfect for high-temperature applications.
- Soft-sealed valves (e.g., rubber): Suitable for temperatures ranging from -29°C to 250°C, depending on the sealing material, catering to various operational needs.
- Test Pressure:
- Shell test pressure: Rated at 1.5 times the nominal pressure, ensuring structural integrity.
- Seal test pressure: Rated at 1.1 times the nominal pressure, guaranteeing dependable sealing performance.
3. Material and Sealing Performance
- Body Material: Constructed from stainless steel (304, 316, 316L), carbon steel (WCB), or copper, this valve offers exceptional corrosion resistance, making it suitable for a plethora of media.
- Sealing Materials: Options include nitrile rubber (NBR), fluororubber (FKM), EPDM, or PTFE. Hard-sealed variants employ stainless steel, ideal 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 like sulfuric and hydrochloric acid, and strong oxidizers such as aqua regia.
- Typical Use Cases: It excels in urban water supply/drainage, petrochemical industries, metallurgy, firefighting systems, power stations, and pharmaceutical industries, where preventing backflow is crucial.
5. Key Advantages
- Low Flow Resistance: Its smooth flow passage ensures minimal pressure drop during valve operation, significantly reducing energy consumption.
- High Reliability: The robust, compact design minimizes closing impact, promising extended service life and reduced maintenance needs.
- Customization Options: Available in multiple models (e.g., H74H, H74W, H74X) to meet diverse sealing requirements and comply with 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.