H74 Stainless Steel Wafer-Type Single-Disc Check Valve

• Customization: Available
• Media: Water
• Temperature: Ordinary Temperature
• Model NO.: H74
• Material: Stainless Steel
• Connection Form: Wafer
• Structure: Swing
• Pressure: Normal
• Function: Wafer
• 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: Wafer
• Transport Package: 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: 1.000kg

Product Description

H74 Stainless Steel Wafer-Type Single-Disc Check Valve

Product Description

  The H74 stainless steel wafer-type single-disc check valve is an ultra-compact valve designed for installation in space-constrained environments. It features a streamlined structure, reliable performance, and versatile applications. Below is the detailed product description:  

1. Structural and Design Features
- Ultra-Thin Profile: Structural length is only 1/4~1/8 of traditional flange check valves, with reduced weight (approximately 1/4~1/20 of conventional valves), enabling easy installation and handling in tight spaces.  
- Single-Disc Swing-Type Design: Equipped with a single disc integrated with an O-ring seal and spring-assisted closure mechanism. Ensures rapid response, excellent sealing, and fast closing to minimize water hammer effects.  
- Flexible Installation: Suitable for horizontal or vertical mounting without additional supports, adapting to diverse pipeline layouts.  


2. Technical Specifications
- Nominal Diameter: DN50~DN1000, covering a wide range of pipeline sizes.  
- Pressure Rating: PN10~PN40 (GB standard) or 150Lb~300Lb (ASME), with a maximum working pressure of 4.0MPa.  
- Temperature Range:  
  - Hard-sealed valves: Up to 400°C.  
  - Soft-sealed valves (e.g., rubber): -29°C to 250°C (depending on sealing material).  
- Test Pressure:  
  - Shell test pressure: 1.5× nominal pressure.  
  - Seal test pressure: 1.1× nominal pressure.  


3. Material and Sealing Performance
- Body Material: Stainless steel (304, 316, 316L), carbon steel (WCB), or copper, ensuring corrosion resistance for diverse media.  
- Sealing Materials: Nitrile rubber (NBR), fluororubber (FKM), EPDM, or PTFE. Hard-sealed variants use stainless steel, suitable for aggressive media like acids, alkalis, oils, and steam.  


4. Applications 
- Compatible Media: Water, oils, steam, acidic/alkaline fluids (e.g., sulfuric acid, hydrochloric acid), and strong oxidizers (e.g., aqua regia).  
- Typical Use Cases: Urban water supply/drainage, petrochemical plants, metallurgy, firefighting systems, power stations, and pharmaceutical industries requiring backflow prevention.  


5. Key Advantages 
- Low Flow Resistance: Smooth flow passage allows minimal pressure drop for valve opening, reducing energy consumption.  
- High Reliability: Robust compact design minimizes closing impact, ensuring long service life and low maintenance.  
- Customization Options: Multiple models (e.g., H74H, H74W, H74X) 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.